A. E. Verrill — North American Cephalopods. 



237 



transverse breadth across alae, 23 ; across anterior edge, at teeth, 

 7'5 ; notcii to union of gular hiraina and alae, 6*5 ; breadth of guhir 

 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 outei-most a little 

 longer and more slender. Tlie 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, stou^t, 

 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, smoothisli, rounded and 

 angular granules, with others that are larger, oblong and oval, smooth, 

 and more or less regularly arranged. The oesophagus is very long 

 and slender, dark-colored. 



Measurements of Ilistioteuthis Collinsii. 



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 {Hd pair) 



Of ventral - 



Breadth of lateral arms, at base 



Thickness 



Diameter of eye-opeuing 



Diameter of head, at base of arms 



Breadth of web, between arms 



Diameter of largest suckers of tentacular-arms i 



