440 A. E. Verrill — North American Cephulopods. 



Plate XXXVIII. 



Figure 1. — Rossia merjaptera V., sp. nov. Dorsal view, natural size. 



Figare 2.— Ommastrephes illecehrosus. Male, -J- natural size. Opened on the ventral 

 side. The peritoneal membrane, most of the renal organs on the right side, and 

 the reproductive organs, except the testicle (t), have been removed. M, mantle 

 cut open : F, caudal fin : P, posterior part of pen ; S, stomach ; S', ccecnl lobe ; 

 H, systemic heart; c, the eye; h, olfactory or nuchal crests; d, siphon; /,/, con- 

 nective cartilages on the base of the siphon ; /', /', connective cartilages of the 

 mantle, which fit into/;/; v/, lateral muscles of neck; g, g, gills; Z, liver; i, 

 ink-sac; h, intestine or rectum; ao, anterior aorta, going to head; bo, efferent 

 branchial vessel; o, median ventral artery of mantle; o', o', lateral arteries going 

 to mantle and fins ; a u, branchial auricles ; v c, anterior vena-cava ; v c", pos- 

 terior vena-cava of left side (the right one has been removed); r, r, saccular ven- 

 tral renal organs; r', more compact glandular (renal) or-an, connected with the 

 posterior venas-cavas ; i, testicle or spermary ; p", hooded posterior tip of pen, 

 enclosing the end of the spermary. From an alcoholic specimen. 



Figure 3.—Architeuthis Harveyi V. (No. 24). Sucker (50th) of lateral arm, second 

 pair, showing the scales around the aperture, front view, enlarged about 4 

 diameters. 



Figure 4. — The same specimen. Otolith; «, side-view; &, front-view. 



Figure 5. — The same specimen. Portion of radula, showing most of three transverse 

 rows of teeth ; a, median teeth ; h, h'. inner-lateral teeth ; c. c', and d, two outer- 

 lateral rows of teeth, much enlarged. 



Figure 6. — The same, more enlarged, lettered as in fig. 5. 



Figure Tc'. — The same. One of the teeth from the outer-lateral row. 



Figure 8. — Octopus Bairdii V. Male. Figured in the act of swimming, dorsal view ; 

 a, terminal spoon of hectocotylized arm. From a living specimen, nearly natural 

 size. 



Pl.\te XXXIX. 



Figure 1. — Desmoteuthis hyperborea V. Female. Specimen opened on the ventral 

 side. M, mantle; F, caudal fin; P, P', posterior part of pen; c, c, eyes; d, 

 siphon; do, aperture of same; d", base and posterior entrance of same; /', com- 

 missure attaching the siphon to the mantle laterally ; g, g, gills ; h, rectum ; S, 

 S, S, divisions of stomach and coecal lobe ; I, I, long tubular intestine, plicated 

 within, and with rows of follicular glands along each side ; i, liver and ink-sac ; 

 H. systemic heart or ventricle ; b o, branchial efferent vessels ; a u, branchial 

 auricles; ?; c", posterior vena-cava ; r', renal organs; ov, ovary; o i;', some ovules 

 larger than the rest; op, op, right and left oviducts; a;', nidamental glands of 

 the oviducts ; xx, x x', accessory nidamental glands. From a mutilated specimen. 



Figure 2. — Ommastreplies illecebrosus. Female, less than natural size. Lettering as 

 in Plate 38, fig. 2, with the following additional letters: &", lower nuchal facet, 

 with the auditory pore; u, urethreal openings in the peritoneal membrane, com- 

 municating between the gill-cavity and the visceral cavity, containing the renal 

 organs, r, r ; v c'. lateral pallial veins, or vente-cavse ; o v, ovary ; o d,o d', right 

 and left oviducts ; oj'j, the anterior opening ; ox, a; ic, nidamental glands. 



Figures. — OmitMstrephes ilkcebroms. Jaws enlarged U diameters: a, superior; 

 b. inferior mandible. 



Figure 4. — Loligo Peaki. Portion of the radula, nnich enlarged. 



