338 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [128] 



becoming involute, so as to form a very long, slender, acute, termiual, 

 hollow cone, extending to the tip of the tail. The anterior end is ob- 

 tusely rounded and thin; a short distance from the anterior end there 

 are two thin lateral processes, directed forward, to which the commis- 

 sural muscles were attached (Plate XXV, figure 2). 



Color of entire body, siphon, and caudal fin dark brown, thickly 

 covered with large, roundish, unequal spots of darker brown and paler 

 brown, intermixed; head, eyes, arms, and web dark brownish purple, 

 with crowded crhomatophores ; suckers yellowish. 



Total length, to end of lateral arms, 16 inches ; to dorsal edge of 

 mantle, 13 inches; length of head, 1 inch; diameter of eye, 1 inch; 

 length of caudal fin, 5 inches; its breadth, 1.80 inches.* 



Measurements (in millimeters). 



Length to tip of lateral arms 



Lengt h to base of arms 



Length to base of mantle, above 



Length ot caudal fin 



Breadth of caudal fin 



Diameter of body 



Diameter of eye 



Length of 3d pair of arms 



Length of ventral arms . . 



Diameter of largest suckers of lateral arms. 



Length of pen 



Of anterior linear portion 



Of posterior lanceolate part 



Breadth of anterior portion 



Breadth of lanceolate part 



A is the specimen described above ; B is the specimen described by Steenstrup from Greenland. 



The latter had the dorsal arms 40 mm long ; 2d pair 50 mm j tentacular arms 68 and 70 uim , respectively. The 

 larger size of the suckers of the latter may indicate that it was a male. 



Our specimen was taken near the northern edge of the Gulf Stream, 

 West long. 55°, by Thomas Lee, of the schooner "Wm. H. Oaks," Janu- 

 ary, 1879, and by him presented to the IT. S. Fish Commission. Baffin's 

 Bay, Northern Greenland (Steenstrup). 



Notes on the visceral anatomy. 



Plate XXV, figure 1. 



The only specimen of this species obtained had the internal organs 

 considerably injured, but the anatomy is so unlike that of the more 

 common genera of squids that it seemed to me desirable to figure such 

 parts as are preserved. 



This specimen is a female, and the large nidamental glands (#', xx, 

 xx') are symmetrically developed on the two sides; these are swollen, 

 voluminous organs, composed of great numbers of internal lamellae; 

 the anterior ones (x 1 ) occupy the region around and in front of the 



* Some of these measurements are slightly larger than those originally given. This 

 is due to the fact that the specimen has been kept, since first received, in somewhat 

 •weaker alcohol, and has become more relaxed in consequence of this, combined with 

 repeated handling. 



