[33] CEPHALOPODS OF NORTHEASTERN COAST OF AMERICA. 243 



nearly parallel with the midrib, but after the first 3 inches they diverge 

 quite regularly to the point, at 25 inches from the end, beyond which we 

 cannot trace them, until they reappear in the first part of the anterior 

 section, where they are quite small and soon fade out entirely, at some 

 distance from the extreme end. Near the posterior end, between the 

 principal costre and the margin, there are on each side two additional 

 costae, much less distinct, and many faint radiating lines . But these di- 

 verge more rapidly, and mostly run into the margin at G to 8 inches from 

 the posterior end. The anterior portions and posterior portions are pale 

 yellow or bluff, fading to whitish at the thin margins, and deepening into 

 pale amber at the midrib. Their substance is flexible, translucent, and 

 very thin — scarcely thicker than parchment, except at the midrib and 

 cost*. 



The third section evidently came from the middle region, where the 

 shell was thickest and broadest. This piece is 7.50 inches long and 4.10 

 broad, with a strongly convex midrib, .30 to .35 of an inch broad, run- 

 ning through the center, but without any lateral costae. In this portion 

 the shell is much thicker and firmer than in the others, and of a decided 

 brownish yellow or dull amber-color, but quite translucent ; it is finely 

 striated with close, nearly parallel lines. The breadth and form of this 

 middle portion must remain undetermined for the present. The ante- 

 rior section is quite incomplete, but is over 10 inches long, and shows 

 an extreme width of about G inches, or 5.75 where the lateral costae dis- 

 appear. Some of the fragments extend forward 8 inches or more be- 

 yond that point, and gradually fade out, both at the ends and lateral 

 margins, into a white, soft but tough, fibrous membrane. So far as this 

 portion is preserved, it indicates a broadly rounded and ill-defined an- 

 terior margin. 



To this species I refer, with some doubt, the tentacular arm of No. 2, 

 preserved in the museum of Saint John's, Newfoundland. It agrees essen- 

 tially in form and size, as will be seen from the description and meas- 

 urements, with the corresponding arms of No. 5. Still, it must be re- 

 membered that, as yet, no reliable distinctions have been made out 

 between the tentacular arms of A. Rarveyi and A. pr biceps. 



The total length of the tentacular arm of No. 2 was estimated at 30 to 

 35 feet. The portion saved measured, when fresh, 579.12™ (19 feet). The 

 circumference of the slender portion was 9 cm to 10 em ; of the enlarged 

 sucker-bearing part, 15.21" (G inches); length of the part bearing 

 suckers, 7G.2 cm (30 inches) ; diameter of the largest suckers, 3.17 cra (1.25 

 inches). Calculating from the photograph, the portion bearing the larger 

 suckers was about 45.7 cm (18 inches) in length, and about G.35 cm (2.5 

 inches) broad across the face; distance between attachments of large 

 suckers, 4.27 cm (1.G8 inches) ; outside diameter of larger suckers, 2.95 cm to 

 3.18 cm (1.16 to 1.25 inches) ; inside diameter, 1.86 cm to 2.54™ (.74 to 1 inch); 

 diameter of the small suckers of the outside rows, 1.02' ,n to 1.22 cm (.40 to 

 .48 of an inch). Mr. Harvey afterwards sent to me a full series of meas- 



