A. E. Verrill — North American Cephalopods, 213 



closely, both in form and size, with those of No. 10, the type of the 

 species, but are a trifle larger. Tlie total length of the upper man- 

 dible is 133"""; greatest breadth, 99™"'; from inner angle of anterior 

 edge to the dorsal end of frontal lamina, 9o ; tip of rostrum, or 

 beak, to the dorsal end of frontal lamina, 92 ; tip of rostrum to 

 bottom of notch, 19 ; notch to inner end of anterior edge, 38 ; 

 transverse breadth between anterior edges, 17"'"'. 



The total length of the lower mandible is 95™™; breadth, from 

 gular lamina to inner end of alge, 99 ; front edge of jaw to posterior 

 end of gular lamina, 83 ; breadth of alae, 41 ; posterior edge of alfe 

 to end of gnlar lamina, 44*5 ; tip of beak to bottom of notch, '22 ; 

 notch to inner angle of aire, 70 ; depth of notch, 3'5™"\ 



The general form of this species is very well shown on Plate XX. 

 This figure has been based upon the sketches and measurements 

 made by me soon after the specimen was received in New York and 

 before it had been " mounted" (see i)age 189). The head was, how- 

 ever, so badly injured that it could not be accurately figured, and 

 this part is, therefore, to be regarded as a restoration, as nearly 

 correct as could be made under the circumstances. It may require 

 considerable corrections, both as to size and form. The caudal fin is 

 remarkable for its small size, as in A. Harveyi. Its breadth is 

 scarcely more than that of the gi-eatest diameter of the body. It is 

 short-sagittate in form, with strongly divergent side lobes, which 

 extend forward beyond their lateral insertions, and end in a rounded 

 or blunt angle. The posterior end is somewhat prolonged and acute, 

 but less so than in that of A. Harveyi, which it otherwise resembles. 

 One of the figures (Plate XIX, fig. 2), was made by me several weeks 

 after it had been placed in strong alcohol, and had shrunk consider- 

 ably ; the other (fig. 1) was made by Dr. J. B. Holder after it had 

 been in alcohol only a few days. 



When fresh, the caudal fin was 84*="' in breadth, but when sketched 

 by Dr. Holder its breadth was 7 1''"' ; its length, from posterior tip to 

 lateral insertions, 48*3'^™; from tip to end of lateral lobes, 6P™. 



The length of the body and head together, when fresh, was about 

 289''"' (9*5 feet) ; but when measured by me it was about 218'="\ 



The sessile arms were unequal in size and length, the longer ones 

 considerably longer than the head and body together. Mr. Harvey 

 found that the longest arms, said to be the ventral ones, were SSS*^™ 

 (11 feet) long, and 43*2°™ (17 inches) in circumference at base. 

 When first examined by me the ventral arms measured 10 '5 feet, 

 and were longer than any of the others, but all the rest were more 



