REPORT OF COMMISSIONER OF FISH AND FISHERIES. [110] 
transverse breadth, across a he, 32 mm ; transverse breadth, across anterior 
edges of ake, at teeth, ll mm . 
These jaws agree pretty nearly in form and size with those of 0. 
pteropus, as figured by Steenstrup, but the latter have a deeper notch in 
the upper mandible, with a more evident lobe beyond it, while the lower 
mandible has a broader and less triangular notch. 
The buccal membrane is large, thin, prolonged into seven acute angles 
or lobes, of which the upper is iu the median plane, opposite the inter¬ 
val between the dorsal arms; the six others are opposite the three other 
pairs of sessile arms. The inner surface of this membrane is covered, 
near the periphery, with small rounded papillae; externally it is con¬ 
nected to the arm by seven membranous bridles, corresponding to the 
seven angles; of these the dorsal one forks, one branch going to the 
inner margin of each dorsal arm; the upper lateral ones join the mar¬ 
ginal membrane of the upper angle of the upper lateral arms; the lower 
lateral ones join the lower marginal membrane of the third pair of arms; 
the ventral ones join the marginal membrane outside of the sucker- 
bearing face of the ventral arms. In front of the bases of each of the 
dorsal and tentacular arms there is a large opening to the space beneath 
this membrane. 
The beak is closely surrounded by a thick, prominent, lobed, and 
wrinkled fleshy collar, with papilla; on its inner surface; outside of this 
there is a smooth, sharp-edged, erect collar, less prominent than the 
inner one. 
The odontophore is similar to that of Ommastrephes; it is sharply bent 
upon itself anteriorly, with the ventral end less than half as long as the 
dorsal; the dentigerous zone is yellowish brown in color, and bordered 
laterally by a thin ridge formed by a row of small plates; the lateral 
membrane is broad, thin, and pale yellow, running straight across, from 
the ventral end, at right angles to the dorsal portion, and then folding 
back upon itself joins ^the dorsal part of the odontophore farther back, 
near its middle; beyond this point it is very narrow and rolled in. 
Length of the dorsal portion, 19 mm ; of the ventral, 9 mm ; breadth of the 
dentigerous zone, anteriorly, 5 mm ; breadth of marginal membrane, ante¬ 
riorly, 7 mm . 
The median teeth (Plate XVII, fig. 4, a) are broad, with three stout 
points, the middle one nearly twice as long as the lateral; the inner 
lateral teeth ( b ) are much longer, with one long stout point and a short 
denticle on the outer side, below the middle; the two outer rows ( c , d) 
have simple, long, and rather stout, curved teeth, those of the outermost 
row a little longer and narrower than the others. The teeth differ de¬ 
cidedly from those of 8. megaptera in the shortness of the lateral denticles 
of the median and inner lateral teeth; moreover, all the teeth are stouter 
and less acute. 
The pen (Plate XVII, figs. 5,5 a) resembles that of Ommastrephes ; it is 
long, widest anteriorly, bordered by strong ribs, obtusely pointed at the 
