438 A. JE. Verrill — North American Cephalopods. 



Figure 3. — Rossia sublevis. Ventral view, enlarged 1 -| diameters. 



Figure 4. — Stoloteuthis leucoptera Verrill. Female. Young, ventral view, enlarged 3 



diameters. 

 Figure 5. — The same. Male. A larger specimen, taken in 1819, enlarged 1^ diameters. 



Plate XXXIl. 



Figure 1. — Stauroteuthis syrtensis V. Dorsal view, -,% natural size. 

 Figure 2.— The same. Lower side of head; s, siphon; e, eye; a, the auditory pore. 

 Figure 3. — The same. The siphon, turned back. 



Figures 4 and 5. — The same. Superior and inferior mandibles, enlarged 2f diameters. 

 This plate was drawn by the author, from the alcohohc specimen, except figs. 4 and 

 5, which are by J. H. Emerton. 



Plate XXXIII. 

 Figure 1. — Octopus Bairdii Verrill. Male. Ventral view, natural size: h, terminal 



organ of the hectocotylized arm ; ?', the groove along the lower side of the arm. 

 Figure \a. — The same specimen. Hectocotylized arm, enlarged two diameters. 

 Figure 2. — Parasira catenulata Steenst. Female. Front view, ^ natural size. 

 Figure 2a. — The same specimen. Side view. ^ natural size. 



Plate XXXIV. 



Figure 1. — Loligo Pealei, var. pallida V. Male. Dorsal view, about J natural size. 



Figure 2. — The same. Pen, about \ natural size. 



Figure 3. — The same. Portion of radula, much enlarged. 



Figure 4. — The same. Upper mandible: a, rostrum or tip of the beak; h, the notch ; 



c, the inner end of ala ; d, the frontal lamina; e, the palatine lamina: ah, the 

 cutting edge of beak ; he, anterior or cutting edge of ala. 



Figure 4a.— Lower mandible : a, rostrum ; ah, cutting edge ; he, anterior edge of ala ; 



d, mentum or chin ; e, gular lamina. 



Figure 5. — Octopus Bairdii V. Young male. Side-view from a living specimen, 



nearly natural size. 

 Figure 6. — The same. Dorsal view, from life, nearly natural size. 



Figs. 3, 4, 4rt, were drawn by the author ; the others by J. H. Emerton. 



Plate XXXV. 

 Figure 1. — Octopus leutiis V. Female. Original specimen. Ventral view, f natural 



size. 

 Figure 2. — The same specimen. Dorsal view, § natural size. 



Plate XXXVI. 



Figure 1. — Octopus piscatorum V. Female. Original type. Ventral view, f nat- 

 ural size. 



Figure 2. — The same specimen. Dorsal view. 



Figure 3. — Octopus obesus V. Male. Original type. Basal portion of one of the 

 lateral arms, to show the arrangement of suckers, natural size. 



Figure 4. — The same specimen. Terminal portion of the hectocotylized arm, en- 

 larged l^ diameters. 



Figure 5. — Sfhenoteuthis pte'^opus V,, from Bermuda. Female. Anterior end of 

 pen, natural size. 



