A. E. Verrill — North American Cephalopods. 
237 
transverse breadth across alas, 23 ; across anterior edge, at teeth, 
7*5 ; notch to union of gular lamina and aloe, 6 - 5 ; breadth of gular 
lamina, 12 - 5. 
The odontophore is rather short, the dorsal portion not much 
exceeding the ventral in length ; the lateral membrane is broad and 
thin, its posterior border extending transversely straight across to the 
dorsal fold, nearly at right angles to the dorsal portion of the odon- 
tophore ; the dentigerous portion, including a thickened lateral ridge, 
outside the teeth, is light red in color. Length of dorsal portion, 
from anterior bend, 8’5 mm ; of ventral portion, 8; breadth of den- 
tigerous zone, 3. 
The median teeth are short, with a strongly incurved, acute cen- 
tral point, and with small inconspicuous or rudimentary, blunt lateral 
denticles on each side ; the inner lateral teeth are considerably longer, 
without a distinct lateral denticle; the two outer rows have simple, 
rather slender, strongly incurved, acute teeth, the outermost a little 
longer and more slender. The plates along the border appear to be 
so closely united as not to be easily separated entire; they form a 
continuous, but slight, narrow ridge, which has an undulated surface. 
The membrane lining the palate bears pale yellowish, scattered, stout, 
not very acute, and but slightly curved teeth, with bases not much 
enlarged ; among these are clusters of small, stony, smoothish gran- 
ules, often aggregated into masses of considerable size. The gular 
membrane also bears aggregations of small, smoothish, rounded and 
angular granules, with others that are larger, oblong and oval, smooth, 
and more or less regularly arranged. The (esophagus is very lono- 
and slender, dark-colored. 
Measurements of Histioteuthis Collinsii. 
Millimeters. 
Tentacular-arms, length 
Diameter at base 
Breadth of club, without membrane . 
Its membranous border ... 
Length of club 
Length of the slender tip 
Of dorsal crest 
Length of dorsal arm of left side 
Of 1st lateral (2d pair) 
Of 2d lateral (3d pair) 
Of ventral 
Breadth of lateral arms, at base 
Thickness 
Diameter of eye-opening 
Diameter of head, at base of arms 
Breadth of web, between arms.. 
Diameter of largest suckers of tentacular-arms 
609 and 635 
125 
17-5 
62 
69 
31 
37 
355 
432 
438 
361 
225 
19 
22-5 
87 
203 to 254 
6-5 
Inches. 
24 and 25 
•50 
•70 
•25 
2- 75 
1-25 
1 *50 
14 
17 
17-25 
14-25 
•90 
•76 
•90 
3- 50 
8 to 10 
•26 
