REPORT OF COMMISSIONER OF FISH AND FISHERIES. [110] 
transverse breadth, across ale, 32™™; transverse breadth, across anterior 
edges of ali, at teeth, 11™™. 
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 in 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 papille; 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 isa large opening to the space beneath 
this membrane. 
The beak is closely surrounded by a thick, prominent, lobed, and 
wrinkled fleshy collar, with papille.on its inner surface; outside of this 
there is a smooth, sharp-edged, ess ees less enue 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 upoi 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™™; of the ventral, 9"™; breadth of the 
dentigerous zone, anteriorly, 5°"; breadth of mar canal menibroe ante- 
riorly, 7™. 
The median teeth (Plate XVII, fig. 4, a) are broad, with three stout 
points, the middle one nearly ferice as long as the lateral ; the inner 
lateral teeth (b) are much longer, with one long stout point Ain 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 S. 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 X VII, figs. 5, 5 a) resembles that of Ommastrephes ; it is 
long, widest anteriorly, bordered by strong ribs, obtusely pointed at the 
