448 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [238] 



Plate XXXVII. 



Figure 1. — Rossia Htjattl Vemll. Female; ventral view of the head and arms; en- 

 larged 3 diameters. 



Figure 2. — Rossia sublevis Verrill. Female; ventral view of the head and arms; en- 

 larged 3 diameters. 



Plate XXXVIII. 



Figure 1. — Stauroteuthis syrttnsis Verrill. Dorsal view; f 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 aud 5. — The same. Superior and inferior mandibles ; enlarged 2j diameters. 

 This plate was drawn by the author, from the alcoholic specimen, except figures 4 

 and 5, which are by J. H. Emerton. 



Plate XXXIX. 



Figure 1. — AUoposus mollis Verrill. Young male; side view, showing the sac contain- 

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

 i natural size. 



Figure la. — The same specimen. Hectocotylized arm removed from the sac; enlarged 

 2 diameters. 



Figure 2. — The same. Young female ; ventral view ; | natural size. 



Figure 2a. — The same specimen. Dorsal view; £ natural size. 



Plate XL. 



Figure 1. — Octopus piscatorum Verrill. Female; original type. Ventral view ; f natu- 

 ral size. 

 Figure la. — The same specimen. Dorsal view. 



Figure 2. — Parasira catenulata Steeust. Female ; front view ; i natural size. 

 Figure 2a. — The same specimen. Side view of body and head ; i natural size. 



Plate XLI. 



Figure 1. — Octopus Bairdii Verrill. Male ; ventral view ; natural size ; h, terminal 

 spoon-shaped organ of the hectocotylized arm ; i, the groove along the lower side of 

 the arm. 



Figure la. — The same specimen. Hectocotylized arm ; enlarged 2 diameters. 



Figure 2. — The same. Male ; figured in the act of swimming ; dorsal view ; a, termi- 

 nal spoon of hectocotylized arm. From a living specimen ; nearly natural size. 



Figure 3. — Octopus Bairdii var. Verrill. Side view of a young male, enlarged about 

 1$ diameters. 



Figure 3a. — The same specimen. Terminal appendage of the hectocotylized arm ; 

 more enlarged. 



Plate XLII. 



Figure 1. — Octopus Bairdii Verrill. Male; dorsal view from a living specimen; nearly 



natural size. 

 Figure 2. — The same. Side view, from life ; nearly natural size. 



Figure 3. — The same. Jaws; s, superior; i, inferior mandibles; enlarged 2 diameters. 

 Figure 4. — The same. Portion of odontophore ; enlarged 22 diameters. 

 Figure 5. — The same. Spermatophores. A, one with the inner sac (S) partly extruded; 



i, the point from which the extension commences ; enlarged 1£ diameters ; B, another 



spermatophore in its original condition; a, filament at large end; b, filament at 



small end. 

 Figure 6. — Octopus obesus Verrill. Male ; original type. Basal portion of one of the 



lateral arms, to show the arrangement of suckers; enlarged 1| diameters. 



