A, EF. Verrill—North American Cephalopods. 237 
transverse breadth across alze, 23; across anterior edge, at teeth, 
75; notch to union of gular lamina and al, 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™"; 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 cesophagus is very long 
and slender, dark-colored. 
Measurements of Histioteuthis Collinsii. 
Millimeters. | Inches. 
Wentacular-arms;, length ..-.-.-£-.---....--: 609 and 635 24 and 25 
MinmavewabiNAsers o>. <= soso ee 12°5 “50 
Breadth of club, without membrane _________ 5 “70 
iis"mentbranous, border= +£2.22 222..32.05.2.62 6:2 on 
Maree Omelibpenc a 225 eth Sot Oo de 69 2°75 
Length of the slender tip _-.--------..--- 2 31 1-25 
Mimcorsal crest ..2s.2<4<20-4-2- eee ee 37 1:50 
Length of dorsal arm of left side-...________ 355 14 
Mrs laterali(2d pair)cass 292252220 2.582. 432 17 
Greedulataral.(Sd pair) oso. .522252-Ne 222 eS 438 L725 
Sravouindleme ssa se wen ee fle Sl 361 14:25 
Breadth of lateral arms, at base__________-_- 22°5 “90 
siimclnensternne Ss APS 00 os edi se Ae 19 75 
Diameter of eye-opening..........-._.__._- 22°5 “90 
Diameter of head, at base of arms__________. 87 3°50 
Breadth of web, between arms___-__________- 203 to 254 8 to 10 
Diameter of largest suckers of tentacular-arms'! 6°5 26 
