MUSEU.M OF COMPARATIVE ZOOLOGY. 



107 



smaller, sharp denticles ; outside of the horny rim the marginal mem])rane is 

 covered with a regular circle of minute horny plates. 



The transverse breadth of this arm-fragment at the thickest end is 9 mm.; 

 across internal fi.;ce, witli the latepil membranes extended, 15 mm.; length of 

 transverse muscular Ixuids of the marginal membranes, 4 mm.; diameter of the 

 largest suckers, 4 mm. ; height of cups, 5 mm. Number of larger teeth on the 

 sucker-rings, 14 to 17; of smaller ones on the inner edge of the rim, 8 to 10. 



Cheiroteuthis lacertosa Verrill. 



Trans. Conn. Acad., V., p. 408, PL [£,f\^». 1-1 f, 1881; Koport U. S. Fish Commis- 

 sion for 1870, [pp. 119, 209,] PL 46, figs. 1-1 f, 1882. 



A specimen of this rare species, somewhat smaller than the original type- 

 specimen, was obtained. It lias both tentacular arms with the clubs in good 

 condition. It agrees closely with the type-specimen, already described in de- 

 tail, and figured by me, in all its essential characters. In color it differs only 

 in being somewhat paler, and in having rather distinct pale, or whiti-sh, small 

 round spots scattered over the dorsal surface. The row of dark spots along 

 each of the ventral arms is very distinct. 



Mcca^nrcmcnts of riirirotciithis lacertosa. 

 Length of body to dorsal edge of mantle, . 



Breadth of body 



Length of caudal fin, ...... 



Transver.se breadth across fins, about .... 



Length of head from dorsal cartilage to base of arms. 

 Breadth of head at eyes, ...... 



Length of dorsal arms, ...... 



-*^ r^iir, 



3d pair, .... 



" '■ ■' 4th pair, ..... 



Diameter of dorsal arms at Ijase, .... 



" '■ '■ " 2d pair, 



•• 3d pair, 

 " '■ '■ '• 4th pair, . 



Length of tentacular arm, ...... 



Length of club, ........ 



Its breadth, in the middle ..... 



Diameter of largest suckers of lateial arms, . 

 " " " ventral arms, 



Station 2.30, in 464 fathoms, off St. Vincent, W. I., 1S7S-79. 



A very large specimen of this species has recently been taken by the U. S. 

 Fish Commission steamer "Albatross," at Station 2074, in 1309 fathoms, X. Lat. 

 41° 43', W. Lon?. G5° 15' 20". 



