346 Mr. H. J. Carter on some West-Indian Leiigtli 6j inches, greatest diameter 3^ ; aperture with the canal 3| long, 1^ wide. Eah. ? This species has lately been purchased by the British Mu-seum, and, although of large size, is apparently undescribed. It is a ponderous sliell, in form not unlike certain species of the genus Fasciolaria, and well distinguished by the character of its sculpture. The uppermost of the spiral ridges forms the thickening beneath the sutural line ; and the two beneath are a little finer than the three others upon the lower convex half of the whorls. XXXVI. — Some Sponges from the West Indies and Acapuico in the Liverpool Free Museum described, with general and classijicatory Remarks. By H. J. CARTER, F.li.S. &.c. [Plates XI. & Xir.] [Concluded from p. 801.] Family 2. Suberitida. Group Laxa. Cliona caribhoia, n. s]). Sponge excavating ; appearing on the surface of old coral [Fg rites) in irregularly scattered subcircular holes, varying in size under a quarter of an inch in diameter, which commu-nicate through short channels with cavernous ragged excava-tions interiorly ; channels filled with tubular processes of the sponge, open and marginated at the holes or closed by a per-forated diaphragm, communicating internally with the sponge, which tapestries the cavernous excavations. Texture loose. Colour ochraceous yellow. Vents represented by the open holes ; pore-area by the diaphragms. Spicules of two forms, viz. : — 1, skeletal, pin-like, smooth, curved, consisting of a spherical head followed by a constriction and then a fusiform shaft, about as wide in the thickest part as the head, gradually terminating in a sharp point, length about 95 by 2^-G0()0ths of an inch (PL XII. fig. 26, a) ; 2, flesh-spicule, a spinispi-rula, extremely slender, about 7-6000ths inch long, presenting five or six bends (fig. 26, 5, c) . Size of specimen indefinite and undeterminable, from the internal extent of the excavations being concealed.
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