A. E. Verrill — North Americdn. Cephalopods. 445 



Figure 4. — Alloposm mollis Verrill. Terminal portion of a mature, detaclied liecto- 

 cotylized arm, natural size. 



Plate LIl. 

 Figure 1. — Eledone verrucosa, Verrill. Side view of the male, natural size. 

 Figure la. — The same. Distal portion of the hectocotylized arm, to edge of basal 

 web, showing the terminal appendage and the lateral groove. 



Plate LIU. 

 Figure 1. — -Eledone verrucosa, Verrill. Dorsal view of the male, natural size. 



Plate LIV. 



Yxgvive \.—Architeuthis princepsY. Side view. Restored mostly from No. 1.3. One- 

 twenty-fourth natural size. 



Figure 2. — Sthenoteuthis pteropus V. Side view of the specimen from Bermuda. One- 

 fourth natural size. 



Figure 2a. — Caudal fin of the same specimen. Dorsal view, one-fourth natural size. 



Figure 3. — Loiigo Fealei Les. Portion from the middle of the tentacular club of a 

 specimen having unusually small tentacular suckers ; a, a', largest median 

 suckers ; b, h', lateral suckers, enlarged 4 diameters. 



Figure i.—Stoloteuihis leucoptera V. Male. Second lateral arm, showing the greatly 

 enlarged middle suckers, enlarged 4 diameters. 



Plate LV. 



Figure l.—Lestoteuthis Fabricii V. One of the tentacular arms; enlarged 2 diameters. 



Figure la. — The same. The larger claw. Side view. 



Figure 16. — The same. Lateral arm ; enlarged 2 diameters. 



Figures 16', 16". — The same. One of the hooks; enlarged 8 diameters. 



Figure Ic. — The same. Portion of ventral arm ; enlarged 2 diameters. 



Figure 1(^. — The same. Peii, ventral view ; natural size. 



Figure 2. — Desmoteuthis tenera V. General figure of male, dorsal view ; natural size. 



Figure 2a. — The same. Teeth of odontophore ; enlarged 22 diameters. 



Figure 26.— The same. One of the larger suckers of the lateral arms, front view; 



enlarged 8 diameters. 

 Figure 2c. — The same sucker ; side view. 

 Figure 2d. — Valve-like apparatus within base of siphon ; natural size ; S, orifice of 



siphon ; «i, median organ ; i\ lateral papilla, and i, medio-dorsal papilla ; n, n', 



lateral cushions. 

 Figure 3. — BracMotetUhis Beanii Verrill. Dorsal view of the male ; natural size. 

 Figure 3a. — The same. Pen, ventral view ; enlarged slightly. 

 Figure 36. — The same. Teeth of the radula ; enlarged 22 diameters. 

 Figure 4. — Desmoteuthis hyperborea. Side view of one of the large suckers of the 3d 



pair of arms, side view ; enlarged 8 diameters. 

 Figure 4a. — The same. Peculiar organs on the interior of the medio-dorsal side of 



the base of the siphon ; enlarged 2 diameters ; i, median, i', lateral papillte. 

 Figure 5. — Chiroteuthis lacertosa V. Young female. One of the suckers of the ten- 

 tacular arms, front view ; enlarged 22 diameters. 

 Figure 6. — Histioteuthis Collinsii. One of the larger suckers of the median rows of 



the tentacular club, side view ; enlarged 2 diameters. 

 Figure 6a. — The same. Oue of the suckers of the sublateral rows of the tentacular club. 



