444 A. E. Yerrill — North American Cephalopods. 



Plate XLIX. 



Figure 1. — Lestoteuthis Fabricii V. {Oheloteuthis 7'apax Verrill.) (Jlub of tentacular 

 arm, front view, enlarged two diameters. The horny hooks are lost from the 

 claws, a, a', a"; b, c, small lateral suckers ; d, d', small suckers of distal portion ; 

 e, e', connective suckers and tubercles. 



Figure la. — The same. One of the suckers corresponding to col fig. 1, front view, 

 much enlarged. 



Figure 16. — The same. A small sucker, corresponding to d of fig. 1. 



Figure Ic, Id. — The same. Front and side-views of one of the claws, with its 

 enclosed horny hook or ' nail,' from the middle of a lateral arm, enlarged eight 

 diameters. 



Figure le. — The same. Connective cartilage from base of siphon, front view, enlarged 

 two diameters. 



Figure If. — The same. Beak and pharynx, side view, enlarged two diameters. 



Figure 2. — Mastigoteuthis Agassizii Verrill. Front view of the beak, buccal membranes 

 (6, d), and bases of the arms ; enlarged two diameters. 



Figure 3rt. — The same. Side view of head, siphon, and anterior part of mantle, show- 

 ing the cartilage (c), on the inner surface of the mantle, which interlocks with c' 

 on the base of the siphon ; e, olfactory (?) papilla, near the ear ; j), an aquiferous 

 pore (?) ; s, siphon; t «, base of tentacular arms; 1, 2, 3, 4, bases of correspond- 

 ing pairs of arms. 



Figure 36. — The same. Pen, ventral view enlarged two diameters. 



Figure 3c. — The same pen. Side-view. 



Figure 3d — The same. Portion from near the end of one of the tentacular arms, en- 

 larged sixteen diameters. 



Figure 3e. — The same. Suckers from the tentacular arm, much enlarged : a, side- 

 view ; a' and a", nearly front views. 



Figure 3^. — The same. One of the suckers from tlie middle of a lateral arm, front 

 view, much enlarged. 



Figure 4. — Octopus Bairdii Verrill. Portion of odontophore, much enlarged. 



Figure 4a. — The same. Jaws : s, superior ; «, inferior mandibles, enlarged two 



diameters. 



Plate L. 



Figure 1. — Alloposus mollis V. Young male. Side view, showing the sac containing 

 the hectocotylized arm, cut open, so as to expose the partially developed arm. 

 One-half natural size. 



Figure la. — The same. Hectocotylized arm removed from the sac, enlarged two 

 diameters. 



Figure 2. — The same. Young female. Ventral view, one-half natural size. 



Figure 2a.— The same specimen. Dorsal view, one-half natural size. 



Plate LI. 



Figure 1. — Octopus Bairdii, var. Verrill. Side view of a young male, enlarged about 



two diameters. 

 Figure la. — The same. Terminal appendage of the hectocotylized arm, enlarged 



eight diameters. 

 Figure 2. — Octopus lentus Verrill. Side view of a male, enlarged about two diameters. 

 Figure 3. — Alloposus mollis Verrill. Portion of an arm, with suckers, from near the 



base, natural size. 



