440 
A. E. Verrill — North American Cephalopoda. 
Plate XXXVIII. 
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', c cecal lobe ; 
H, systemic heart; c, the eye; b, olfactory or nuchal crests; d, siphon; /,/, con- 
nective cartilages on the base of the siphon ; /', f', connective cartilages of the 
mantle, which fit into /, /; in', lateral muscles of neck; g, g, gills; l, 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-eava ; 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) oivan. connected with the 
posterior venae-cavse; t, 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 atm, second 
pair, showing the scales around the aperture, front view, enlarged about 4 
diameters. 
Figure 4. — The same specimen. Otolith; a, side-view; b, front-view. 
Figure 5. — The same specimen. Portion of radula. showing most of three transverse 
rows of teeth ; a, median teeth ; b, b'. 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 7c'. — The same. One of the teeth from the outer-lateral row. 
Figure 8. — Octopus Bairdii \ . Male. Figured in the act of swimming, dorsal view ; 
a, terminal spoon of hectocotylized arm. From a living specimen, nearly natural 
s ; ze. 
Plate 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; l , l, 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, branchial 
auricles; v c", posterior vena-cava ; r', renal organs; ov, ovary; o v', some ovules 
larger than the rest; op, op, right and left oviducts; x'. nidamental glands of 
the oviducts ; x x, x x', accessory nidamental glands. From a mutilated specimen. 
Figure 2 . — Ommastrephes illecebrosus. Female, less than natural size. Lettering as 
in Plate 38, fig. 2, with the following additional letters: b", lower nuchal facet, 
with the auditory pore; u, urethreal openings in the peritoneal membnne, com- 
municating between the gill-cavity and the visceral cavity, containing the renal 
organs, r,?-; v c'. lateral pallial veins, or vente-cavae ; ov, ovary; od,od', right 
and left ovllucts ; op, the anterior opening ; ox, xx, nidamental glands. 
Figure 3. — Ommastrephes illecebrosus. Jaws enlarged H diameters: a, superior; 
b, inferior mandible. 
Figure 4 . — Loligo Pealei. Portion of the radula, much enlarged. 
