368 A. E. VerrUl — North American Gephalopods. 



and large, elongated pyriform, attached singly or in clusters by the 

 small end. 



In addition to the seve)-al small species described here, a much lar- 

 ger rough-backed species has been taken several times at Fort Macon 

 and near Beaufort, N. 0. This is probably Octopus rugosiis Bosc, a 

 West Indian species. 



Octopus Bairdii Yerrill. 



Octopus Bairdii Verrill, Amer. Jour. 8d., v, p. 5, Jan., 1873; .\ix, p. 294=, 1880; 



American Naturalist, vii, p. H94, figs. 7(i, 77, 1873; Am. Assoc. Adv. Sci. for 



1873, p. 348, pi. 1, figs. 1, 2, 1874. 

 Lt. 0. Sars, Molliisca Regiouis Arctic^; Norvegiic, p. 339, pi. 33, tigs. 1-10 ( ? ), pi. 



xvii, figs. 8a to %d (dentition and Jaws), 1878. 

 Tyron, Man. Gonch.. i, p. 116, pi. 32, figs. 37, 38 (description and figures from tlie 



papers by A. E. V.). 

 Verrill, Bulletin Mus. Comp. Zool., viii, p. 107, pi. 2, figs. 4, 4a; pi. 4, figs. 1, la, 



1881. 



Plate XXXIII, pigs. 1, la. Plate XXXIV, figs. 5, 6. Plate XXXVI, fig. 10. 

 Plate XXXVIII, fig. 8 ; Plate XLIX, figs. 4, 4a ; Plate LI, figs. 1, la. 



The body is short, thick, somewhat depressed, broadly rounded 

 posteriorly, separated from the head only by a slight constriction at 

 the sides. Head almost as broad as the body, swollen above and 

 around the eyes, concave in the middle above ; around the eyes, and 

 especially in front and above, there are numerous small, conical, often 

 irregular and rough tubercles; a little removed from the upper side 

 of each eye, is a much larger, rough, irregularly conical, erectile cirrus, 

 which has some small, more or less prominent, conical papillae on 

 its surface ; the whole upper surface of the body, head, and arms is 

 also covered with minute scattered papillae, which are usually but 

 little prominent, but in some of the larger males they become much 

 larger and more numei'ous, and have the form of small prominent 

 warts. 



The jaws (Plate XLIX, fig. 4«) have rather blunt, slightly incurved 

 tips, with the angle at the bases of the cutting edges round and with- 

 out any distinct notch. The odontt)phore, (Plate XLIX, fig. 4) has a 

 median row of large, acute teeth, with broad bases without lateral 

 denticles; the inner lateral teeth are much smaller, with curved acute- 

 tiiangular points; outer lateral teeth longer and more acute ; mar- 

 ginal plates large and distinct. 



Siphon large, tapering, capable of being l)ent in all directions, so 

 as to be used for swinnning either forward, backward, or sideways, 

 according to its direction. 



