REPORT OF COMMISSIONER OF FISH AND FISHERIES. [ 40 ] 
inner edge nearly straight; at the base is a rather large and wide, Y-shaped 
notch, the tooth beyond it being broad-triangular and rather large; 
beyond the tooth the alee are white, soft, and cartilaginous. 
Measurements of jaws {in inches). 
Transverse diameter of buccal mass.. 1. 50 
Vertical diameter of buccal mass. 1.70 
Upper mandible: 
Tip to end of frontal lamina. 1.25 
Tip to notch.57 
Tip to lateral border of lamina.77 
Lower mandible: 
Tip to border of mentum.45 
Tip to lateral border of al®.70 
Tip to inner end of alse. 1. 02 
Tip to bottom of notch. 32 
Hight of tooth....06 
Notch to inner end of al*. 80 
Mentum to inner end of alte. 1. 20 
The portion of the oesophagus preserved is 14.75 inches long and about 
.15 of an inch broad, in its flattened condition. 
The radula (Plate Y, figs. 5-7) is amber-colored, .18 of an inch broad. 
The tridentate median teeth have moderately long but not very acute 
points, of which the middle one is a little the longest. The inner lateral 
teeth are bidentate, and somewhat broader and longer than the median 
ones; their outer denticle is well developed, but considerably shorter 
than the inner one. The next to the outer lateral teeth are larger at base 
and much longer, simple, broad, tapering, 'flattened, slightly curved, 
acute at tip. They appear not to have the small lateral denticle observed 
on the corresponding teeth of the adult Architeuthis (see Plate Y, figs. 
1 , 2). The outer lateral teeth are similar to the preceding, but rather 
longer and not quite so broad at base. The marginal plates are well- 
developed, thin, somewhat rhomboidal. 
The internal cavity of the ears is somewhat irregularly three-lobed, 
with several rounded papfilm projecting inward from its sides, very much 
as in those of Ommastrephes. Each ear contained two irregular-shaped 
otoliths, one of which (Plate Y, fig. 8) was much larger than the other, 
in each ear. 
The eyes were both burst, and most of their internal structure was de¬ 
stroyed. So far as preserved they closely agree with those of Omma¬ 
strephes. The eyeballs w r ere large and somewhat oblong in form, and 
appear to have been nearly 2 inches broad and 3 long. The eyelids 
are badly mutilated, but the anterior sinus can be imperfectly made 
out. It seems to have been broad and rounded. The aquiferous cavities 
appear to have been like those of Ommastrephes. The form and struc¬ 
ture of the cartilaginous ‘brain-box’ also appear to be essentially the 
same as in the genus last named. 
