A, EF. Verrill—North American Cephalopods. 185 
specimen :* one showing the entire body, somewhat mutilated anteri- 
orly; the other showing the head with the ten arms attached (plate 
XIII). The body or mantle of this specimen was about seven feet 
long, and between five and six feet in circumference; the relatively 
small caudal fin was arrow-shaped and twenty-two inches broad, but 
short, thick, and very pointed at the end; the two long tentacular- 
arms were twenty-four feet in length, and two and a half inches in 
circumference, except at the broader part near the end; the largest 
suckers, which form two regular alternating rows, of twelve each, 
were 1°25 inches in diameter, with serrated edges. There is also an 
outer row of much smaller suckers, alternating with the large ones, on 
each margin; the terminal part is thickly covered with small ser- 
rated suckers; and numerous small suckers and tubercles are crowded 
on that portion of the arms where the enlargement begins, before the 
commencement of the rows of large suckers. The arrangement of 
the suckers is nearly the same as on the long arm of No. 2, but in the 
latter the terminal portion of the arm, beyond the large suckers, as 
shown in the photographs, is not so long, tapering, and acute, but 
this may be due to the different conditions of the two specimens. 
The eight short arms were each six feet long; the two largest were 
ten inches in circumference at base; the others were 9, 8 and 7 inches. 
These short arms taper to slender acute tips, and each bears about 
100 large, oblique suckers, with serrated margins. 
The portions of the pen in my possession belong mostly to the two 
ends, with fragments from the middle region, so that although 
neither the actual length nor the greatest breadth can be given, we 
can yet judge very well what its general form and character must 
have been. It was a broad and thin structure, of a yellowish brown 
color, and translucent. Its anterior portion (plate XV, fig. 3) resem- 
bles that of Zoligo, but its posterior termination is entirely different, 
for instead of having a regular lanceolate form, tapering to a point at 
the figure were restored as in Loligo. Subsequent studies and additional specimens 
show that this genus is closely allied to Ommastrephes. Therefore, the head would 
have been more correctly shown had it been restored with reference to that genus» 
which has been done in this paper. The most obvious difference is in the eyes, which 
have distinct lids and an anterior sinus. 
* Cuts made from these photographs have been published in several magazines and 
newspapers, but they have been engraved with too little attention to details to be of 
much use in the discrimination of specific differences. I have, therefore, prepared 
new figures from these photographs with the greatest care possible. These figures 
are particularly valuable, as showing the arrangements of the suckers on the short 
arms. 
Trans. Conn. AOAD., VOL. V. 24 DECEMBER, 1879, 
