A. E. Verrill — North American Cephalopods. 443 



Figure 5. — Sthenoteuthis megaptera V. Beak and iuner buccal membrane, front view, 



natural size. 

 Figure 5a. — The same. Large sucker from the tentacular arm of the same specimen, 



front view, enlarged two diameters. 



Plate XLVl. 



Figure 1. — CaUiteidhis reversa Verrill. Female. Ventral view, natural size. 



Figure la. — The same. Beak, buccal membranes and base of arms, front view, 

 natural size. 



Figure lb. — The same. One of the larger suckers from a lateral arm, enlarged. 



Figure 2. — Heteroteuthis tenera Verrill. Dorsal view of female, enlarged two diameters. 



Figure 2u. — The same. Tentacular club, enlarged four diameters. 



Figure 2&. — The same. Pen, enlarged four diameters. 



Figure 2c. — The same. Jaws, side view, enlarged four diameters; a, superior; h, in- 

 ferior mandible. 



Figure 2d. — The same. Part of the odontophore, much enlarged. 



Figure 3. — The same. Front view of male, enlarged two diameters. 



Figures 3a, 35. — The same. Front and side-views of one of the suckers of the 

 lateral arms of the same specimen. 



Figure 4. — Rossia sublevis Verrill. Pen from ? (see Plate 47, fig. 2), enlarged four 

 diameters. 



Figure 5. — Rossia Hyatti Verrill. Female. Suckers, enlarged fifteen diameters ; a, one 

 of the largest from third pair of arms, side-view ; h, c, two forms of suck- 

 ers from the tentacular club. 



Figure 6. — Rossia megaptera VerriU. Female. Suckers, enlarged fifteen diameters ; 

 a, front view of one of the largest from third pair of arms ; b, c, d, three suck- 

 ers from the tentacular club. 

 Figures 5 and 6 are camera-lucida drawings by the author ; the rest are by J. H. 



Emerton. 



Plate XLVII. 



Figure 1. — C hiroteuthis lacertosa? Verrill. One of the tentacular arms, outer side, 



natural size. 

 Figure la. — The same. Front view of club, enlarged two diameters. 

 Figure 15. — The same. One of the suckers, enlarged. 

 Figure 2. — Rossia sublevis, var. Verrill. Female. Dorsal view, natural size. 

 Figure 2a. — The same. One of the suckers of the tentacular club, side-view, much 



enlarged. 

 Figure 25. — The same. Marginal scales on the edge of the sucker, more enlarged. 

 Figure 3. — The same. One of the arms of the third pair, from another female 



example, enlarged two diameters. 

 Figure 4. — The same. Corresponding arm of the male. 



Figure 5. — Heteroteuthis tenera Verrill. Dorsal view of male, enlarged two diameters. 

 Figure 5a. — The same. One of the larger marginal suckers of the tentacular club ; 



front view, much enlarged. 



Figure 55. — The same. Portion of the margin of the sucker, more enlarged; to show 



the scales. 



Plate XLVIII. 



Figure 1. — Mastigoteuthis Agassizii Verrill. Dorsal view, shghtly enlarged. 

 Trans. Conn. Acad., Vol. V. 53 December, 1881. 



