440 A. E. Verrill — North American Cephalopods. 



Plate XXXYIII. 



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



Figure 2. — Ommastrephes illecebrosus. Male, ^ 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', coecal lobe ; 

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

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

 mantle, which fit into/,/; m\ lateral muscles of neck; g, g, gills: ?, liver ; i, 

 ink-sac; h. intestine or rectum; ao, anterior aorta, going to head; ho, 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 ; r 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 vense-cavse; f, testicle or spermary; p", hooded posterior tip of pen, 

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



Figure 3. — Architeuthis Harveyi Y. (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; 5, front- view. 



Figure 5. — The same specimen. Poi'tion of radula, showing most of three transver.se 

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

 lateral rows of teeth, much enlarged. 



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



Figure 7c'. — The same. One of the teeth from the outer-lateral row. 



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

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

 s'ze. 



Pl.vte XXXIX. 



Figure 1. — Desmoteuthis hyperhorea Y. 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, long tubular intestine, plicated 

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

 H, systemic heart or ventricle; bo, branchial efferent vessels; a u, branchiiil 

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

 larger than the rest; oj5, oj}, right and left oviducts; cc', nidamental glands of 

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



Figure 2. — Ommastrephes illecehrosu.o. Female, less than natural size. Lettering as 

 in Plate ."58, fig. 2, with the following additional letters: h", lower nnchal facet, 

 with the auditory pore; u, urethreal openings in the peritoneal membr.ine, com- 

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

 organs, r,?'; vc', lateral pallial veins, or veme-cavEe ; o i\ ovary; od,od', right 

 and left oviducts ; op, the anterior opening ; ox, cc a;, nidamental glands. 



Figures. — Oinmaf<trej)hes illecehrosus. Jaws enlarged H diameters: a, superior; 

 h, inferior mandible. 



Figure 4. — Loligo Pealei. Portion of the radula, much enlarged. 



