Bulletin of the United States National MuseumSmithsonian Institution Press, 1916 |
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adductor ridge alæ Albatross station amphitrite articular furrow articular ridge balanoides BALANUS BALANUS Balanus tintinnabulum barnacle basal edge basal margin base basis basiscutal angle Bering Sea border carina Chthamalus cirri Cirrus iii CIRRUS VI compartments concavus conic crenatus Darwin distal epidermis external fathoms figure fixed scutum greatest diameter growth-ridges Gruvel height Hoek individuals Island labrum lateral depressor muscle Latitude length Lepas Linnæus longitude longitudinal lower mandible MAXILLA Monograph narrow National Museum nearly numerous oblique opercular valves orifice outer pairs of spines parietal tubes parietes Pilsbry Plate pores posterior ramus radii rostratus rostrum sculpture scuta scutum scutum and tergum SEGMENT OF CIRRUS septa sheath shell short smooth species specimens spinules spongicola spur striæ subequal subspecies summits sutures teeth tergal margin tergum Tetraclita thin tintinnabulum transverse septa Type.-Cat Unalaska unequal rami upper usually Verruca W. H. Dall wall wide
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Seite 251 - ... examined about 25 skulls which belong to Symbos cavifrons. In all of these the exostoses of the horn-core meet across the forehead. If the Grand Rapids skull is the female of S. cavifrons, it is very remarkable that only one female should be discovered among 25 specimens. Among the skulls of S. cavifrons there is a good deal of variation in the size of the cores. It seems very probable that those specimens which have the more feebly developed cores are the females. Inasmuch as in the males of...
Seite 277 - Cope). I have observed them on specimens of that species hauled up on the beach at Monterey for cutting off the blubber, in the bay whaling of that locality. The superior surface of the lateral laminae being covered by the black skin of the whale, are not visible ; and the animal, removed from its native element — protruding its bright yellow hood in every direction, to a surprising distance, as if gasping for breath — presented a truly singular appearance.
Seite 158 - General appearance. — White, usually of a dirty tint, from the yellowish or brownish persistent epidermis ; conical, generally with the parietes rugged and irregularly folded longitudinally, but sometimes much depressed and extremely smooth ; often cylindrical and very rugged ; occasionally club shaped, the upper part being much wider than the lower ; specimens in this latter condition sometimes have extremely narrow parietes, like mere ribs, and wide radii. The orifice In the cylindrical varieties...
Seite 128 - Inner lamina slightly ribbed; the dentlculi on the bases of the parietal longitudinal septa are sharp. I could not see any transverse septa in the parietal tubes. The radii are rather narrow, their summits are remarkably jagged and very oblique ; the septa are plainly denticulated on both sides, but chiefly on the lower side; each septum itself, toward the inner lamina of the radius, branches and divides ; the interspaces are filled up nearly solidly.
Seite 138 - ... subequal branches of about 35 segments. These segments are convex anteriorly, each with 6 or 7 pairs of spines, and having the usual posterior sutural groups of small spines. (Fig. 6 D, I5th and i6th segments of cirrus v.) The penis is very long, over 20 mm., purplish, densely and conspicuously annulated, with a very few short hairs near the end. There is a blunt projection on the dorsal base. The cirri and mouth parts of the largest specimen in group no. 38670 agree fully with no. 38667. In...
Seite 79 - PI. 1, fig. 6, 1841, Darwin, op. cit., pp. 248, 614, PI. 5, fig. 4. From Massachusetts Bay to Florida and the West Indies. It sometimes occurs in brackish or even fresh water. Professor J. Wyman found it living about 50 miles up the St. John's River, Florida, where the water was fresh enough to drink, and the specimens lived well when transferred to a vessel of perfectly fresh water.
Seite 136 - D, i5th and i6th segments of cirrus v. sometimes bear short, acute spines projecting outward and downward, each prolonged upward in a short rib. These spines appear in groups and are not numerous when present. The radii are much wider than in B. rostratus, transversely striated, with the upper edges parallel to the base. They are only very little sunken below the parietes. Internally the plates are deeply, closely, and sharply sulcate, and the bases of the parietes have square holes as in B. rostratus....
Seite 117 - in the cirri none of the segments are very protuberant. In the first pair, one ramus is nearly twice as long as the other. In the posterior pairs the segments are not much elongated, but each supports seven pairs of spines.
Seite 165 - Phila. 1877, p. 60. Many specimens of this species are in the United States National Museum from various points in Illinois. The chief distinctive character of this species, the small size of the scales, seems to be constant Specimens of an Aphododerus, from near New Orleans, the original locality of Aphredederus gilbosus Le Sueur, seem to be identical with A.