33° BULLETIN OF THE BUREAU OF FISHERIES. 



emarginate on the ventral side. Head small, narrower than the body, subquadrate ; eyes moderate and 

 prominent, lachrymal sinus large. Sessile arms, not half so long as the body, nearly of the same size; 

 formulaof relative size, counting from the dorsal side, i, 2, 4, 3, tlie second and last, being almost exactly 

 of the same length, the dorsal the smallest. The dorsal arms are connected at their base by a minute 

 membrane, which does not run up their sides; the second and third arms, and the tentacles have this 

 membrane on one side, nuuiing to the extreme tips; the ventral and the adjoining arms are united by 

 a larger membrane, but like the dorsal, the ventral arms are unprovided with it beyond the base, and 

 are not united to each other; the tips are laterally compressed. The cupules on the sessile arms are 

 strongly constricted at their base, and are pedunculated; they are arranged in a double series, without 

 being either in pairs, nor yet alternating. They commence a short distance from die base of the arms, 

 and are continued to the extreme tips, becoming smaller and scattered as they approach the end. Ten- 

 tacles, nearly two-thirds the length of the body, exclusive of the head, the club forming about one-third 

 of the whole; the club is little if at all widened; tentacle naked to the baseof the club, where the "sucker" 

 is placed, consisting of a small, irregularly rounded disc, bearing eight or nine sessile cupules. Beyond, as 

 far as the extreme tip, are large and small, strongly hooked claws, arranged in an irregular line, and each 

 one pierced near the base, and above grooved for half its length on the concave side. Mouth small, 

 surrounded by a thin, simple lip, and outside of that, by a seven-lobed fold of skin, two lobes of which 

 are placed opposite the base of the ventral arms — one opposite the space between the dorsals, and the 

 other four opposite the laterals. Mandibles black. Siphon small, hardly projecting beyond the mantle. 

 Fins dorsal, triangular, terminal, half as long as the body, outer angle rounded. Internal plate long, 

 very slender, widest in the middle, tapering both ways, median ridge as high as the lateral plate, conical 

 portion at the base, minute, laterally compressed, tip curved. 



Color, light yellowish -brown, on the under surface and inside of the arms; back purplish-brown, 

 nearly black on the median line and the posterior portion of the head, caused as in the preceding species, 

 by the peculiar arrangement of dark spots. On the back of the fins these spots are of two sizes — large ones 

 surrounded by an uncolored space, and small ones of a lighter color, interspersed. 



Length of horny plate, 3.2 inches; width, .15 inch; length of terminal cone, .15 inch; circum- 

 ference of body, 2 inches; length of fin, 1.6 inches; breadth of fins, 2.1 inches, length of longest sessile 

 arm, 1.5 inches; length of shortest, .9 inch; length of tentacle, 2.1 inches. 



Said to have been caught off Cape Horn. 



[From Proceedings Academy Natural Science, Philadelphia, vol. xiv, 1S62, p. 483.] 

 DESCRIPTION OF A NEW SPECIES OF CEPHALOPOD FROM THE COAST OF C.\LIFORNI.\. 



By W. M. Gabb. 



Ommastrephes Tryonii. — Body large, subcylindrical for about two-thirds of its length, posterior 

 tliird tapering, acute at tlie extremity. Fins between one-third and one-fourth the length of the body, 

 nearly twice as broad as long, rhomboidal; angles rounded. Anterior of the body truncated at a right 

 angle to the length and with a slight angle on the dorsal median line. Siphon short, broad, head small, 

 not wider than the body, flattened above (and at the sides?). Eyes small. Sessile arms robust, short, 

 compressed: comparative length, 4, 2, i, 3, the dorsal being the shortest, although they are all of nearly 

 equal length. The second and third pair are so compressed that the cups appear to be arranged in a 

 single line. The lower half or two-thirds of the outer side of the dorsal and the whole of the same portion 

 of the other arms are fringed with a narrow membrane. The inner side of the third pair is also fringed 

 on each side of the cupules. 



The cupules are all small, but the bordering rows of teeth are well marked. Tentacular arms com- 

 pressed, very little longer than the longest pair of sessile arms. Cupules arranged on the distal two- 

 fifths, largest in the middle, becoming very small towards each end. Mouth small, the surrounding 

 membrane without cupules, with a bifurcating process between the dorsal pair of arms and one extending 

 to each of the other sessile arms. Surface flesh colored, covered with small dots, sparsely placed on 



