A, EF. Verrill—North American Cephalopods. 249 
The lower mandible now measures, from the tip of the rostrum to 
the posterior dorsal border of the mentum, 13"™"; tip to the extreme 
posterior end of the gular lamina, 50"; to the dorsal angle of the same, 
33™™" tip to the inner end of the alee, 46"; to the bottom of the notch, 
13™"; breadth of ale, 24™™; transverse breadth at notches, 12™". 
The upper mandible, from the tip of the beak to the end of the 
palatine lamina, is 71™™ long; from tip of beak to end of frontal 
lamina, 538"; to bottom of notch, 11™™; length of exposed (dark) 
portion of anterior edge of ale, 14™™. 
The odontophore (Plate XXIV, figs. 1-4), has a very broad, thin, 
marginal membrane, yellowish-white in color, becoming brown and 
thickened toward the dentigerous portion, where there is a row of 
very small, thin plates, bordering the outer row of teeth; the ventral 
portion of the dentigerous band is dark brown, regularly convex, and 
narrowed gradually to the obtuse end; the dorsal portion is consider- 
ably longer, abruptly bent backward, with the borders incurved, 
gradually decreasing to the posterior end; on this part the teeth 
become much smaller and paler. 
The outer lateral teeth, on the anterior portion, are long, slender, 
sharp, and strongly curved; the median ones are much shorter, with 
a sharp, strongly curved central point and a very small, almost 
rudimentary denticle on each side; the inner laterals are a little 
longer than the median, with a stout incurved point; on the outer 
side of its base there is a small denticle; the teeth of the two outer 
rows, on each side, are simple. 
Length of odontophore, from anterior bend to posterior tip of dor- 
sal end, 22™"; to tip of ventral end, 14™™; breadth of lateral mem- 
brane, in middle, 11™™; of dentigerous belt, anteriorly, 3". 
The following measurements were made by Mr. Dall, from the 
fresh specimens. 
Table of measurements (in inches). 
No.1. ; No.2. No, 3. 
Total length (to mutilated ends of tentacles),-.--| 80+ Oe 167 + 
Base of arms to tip of tail (head and body), - ---_- 51 67 102 
Base of arms to edge of mantle (head),________- 5 6 10°5 
Edge of mantle to tip of tail (body), ----------- 46 61 91°5 
Length of tail-fins (insertion to tip), ----------- ae 33°75 48 
Brosdineomiall-nms: 222s 502 Po eek oe eee 13°5 + 25:5 42 
MEM UNOb NOM len cece Soe sccsen se Seek oaas se 60 89 
Breaarnioef pen, in middle, ....2.=.-. 202.8 Ae ce 12°25 
Length of tentacular-arms (ends gone),-___-_--. 30+ 43 4 61+ 
Length of longest sessile arms (ends gone), _--.-| 30+ 2375+ | 40+ 
WrAMe Lomo MOC yao s22h ease sso: | eee 75 zs 18 
Breadth between insertions of fins, ----.--_---- SE 3°5 5 
HD AINOLOELOls OV Cyseranye sass Se aa aso oe ee =o 1 1:25 
TRANS. Conn. ACAD., VOL. V. 31 FEBRUARY, 1880. 
