[23] CEPHALOPODS OF NORTHEASTERN COAST OF AMERICA. 233 



SPECIAL DESCRIPTIONS OF THE ATLANTIC COAST SPECIES. 

 Architeuthis Steenstrup. 



Architeuthus Steenstrup, Oplysninger om Atlanter, Collossale Blaeksprutter, 

 Forhandlinger Skarid. Naturf., 18513, vol. vii, p. 182, Christiana, 1857 (name 

 proposed, but no generic characters given). 



Architeuthis Halting, Verb. K. Akad., Weten., Natuurk., IX, 1860. 



Meyaloteuthis Kent, Proc. Zool. Soc, London, 1874, p. 178 (no generic charac- 

 ters given). 



Size large. Body stout, nearly round, swollen in the middle. Caudal 

 fin, in the typical species, relatively small, sagittate. Head large, 

 short. Eyes very large, oblong-ovate, with well-developed lids and an- 

 terior sinus. Sessile arms stout, their suckers large, very oblique, with 

 the edges of the horny rings strongly serrate, especially on the outer 

 margin. The suckers of the basal half of all the arms, except the ven- 

 tral ones, differ from the distal ones in being denticulated all around 

 and less oblique. The margin has around it a free-edged membrane, 

 which closely surrounds the denticles when the sucker is used, and 

 allows a vacuum to be produced. Tentacular arms very long and slender, 

 in extension, the proximal part of the club furnished with an irregular 

 group of small, smooth-rimmed suckers, intermingled with rounded 

 tubercles on each arm, the suckers on one arm corresponding with the 

 tubercles of the other, so that by them the two arms may be firmly 

 attached together without injury, and thus used in concert; other simi- 

 lar suckers and tubercles, doubtless for the same use, are distantly 

 scattered along the slender part of these arms, one sucker and one 

 tubercle occurring near together. A small cluster of smooth-edged 

 suckers also occurs at the tips. The internal shell (imperfectly known 

 in one species only) has a thin and very broad, lanceolate posterior 

 blade, expanding forward from the end, with divergent ribs. 



This genus is closely allied to Ommastrephes, from which it may be 

 best distinguished by the presence of the peculiar connective suckers 

 and tubercles for uniting the tentacular arms together. 



Architeuthis Harveyi Verrill. — (Harvey's Giant Squid.) 



Meyaloteuthis Harveyi Kent, Proc. Zool. Soc. London, 1874, p. 178. 

 Architeuthis monachus Verrill, Ainer. Journal Science, vol. ix, pp. 124, 177, pi. 



2, 3, 4, 1875; vol. xii, p. 23G, 1876. American Naturalist, vol. ix, pp. 



22, 78, figs. 1-6, 10, 1875 (? non Steenstrup). 

 Ommastrephes Harveyi Kent, Proc. Zool. Soc. London, 1874, p. 492. 

 Ommastrephes (Architeuthis) monachus Tryon, Manual of Conchology, vol. i, p. 



184, pi. 83, fig. 379, pi. 84, figs. 380-385, 1879. (Descriptions compiled and 



figures copied from the papers by A. E. V. ) 

 Architeuthis Harveyi Verrill, Trans. Conn. Acad., vol. v, pp. 197, 259, pis. 13- 



16 a, 26, 1879-'80. Arner. Journal Science, vol. xix, pp. 284, 287, pi. 13, 



1880. 



