REPORT OF COMMISSIONER OF FISH AND FISHERIES. [232] 
Figure 4.—The same. Side view of the head and siphon, after removal of part of the 
mantle, $- natural size; 1, 2, 3, 4, bases of 1st to 4th pairs of sessile arms; t a, base of 
tentacular arm; to, mantle; 6, 6', olfactory crests around the ear; d, siphon; /,/, 
one of the connective cartilages for attaching it to the mantle. 
Figure 4«.—The same. Lateral connective cartilage, n, on the inside of the mantle, 
which fits closely into the cartilage pit (/) on the base of the siphon. 
Figures 5 and 5 a .—The same. Side and front views of one of the larger suckers of 
the lateral arms; enlarged 4 diameters. 
Figures 6 and 6a .—The same. Side and front views of a smaller distal sucker of the 
lateral arms; enlarged 4 diameters. 
Figure 3 is from a camera-lucida drawing by the author. 
Plate XX. 
Figure 1 .—Ommastrephes illecebrosus Merrill. Female; less than natural size. Letter¬ 
ing as in Plate 19, figure 1, with the following additional letters: b", lower nuchal 
facet, with the auditory pore; u, urethreal openings in the peritoneal membrane, 
communicating between the gill-cavity and the visceral cavity, containing the renal 
organs, r, r; v c', lateral pallial veins, or veme-cavm; o v, ovary; o d,o d‘, right and 
left oviducts ; op, the anterior opening; o x, x x, nidamental glands. 
Figure 2.— Loligo Pealei, var. pallida. Anatomy of the alimentary canal, &c.; £ nat¬ 
ural size. The organs are shown nearly in a dorsal view, except the jaws, which 
are viewed from the side and in section; b to, buccal membrane ; s to, section of supe¬ 
rior mandible; i to, of inferior mandible; o d, of odontophore, with teeth ; o e, o e 1 , 
oesophagus; s g, salivary glauds; s d, salivary duct; g l, suboesophageal ganglion; 
l l, liver; ao, ao, anterior aorta, running parallel with the msophagus along and 
through the liver; S, first stomach ; S', second stomach or coecal appendage; S", third 
stomach, strongly plicated within; h, intestine or rectum ; Id , anal orifice and papil- 
he; i, ink-sac; i', orifice of its duct; H, ventricular heart; bo, cut end of one of 
the branchio-cardiac vessels; g o, genital artery, going to testicle; so, so, branches 
of gastric artery; t, testicle or spermary; v d, vas deferens; p r, prostate gland and 
vesiculse seminales; s s, spermatophore-sac; p, ‘penis’ or efferent duct. 
Plate XXI. 
Figure 1 .—Mastigoleuthis Agassizii Verrill. Dorsal view ; slightly enlarged. 
Figure 16.—The same. Pen ; ventral view ; enlarged 2 diameters. 
Figure lc.—The same. Side view of the same pen. 
Flate XXII. 
Figure 1 .—Calliteuthis reversa Verrill. Ventral view; natural size. 
Figure 1«.—The same. Beak, buccal membranes and base of arms; front view ; nat¬ 
ural size. 
Figure 16.—The same. One of the larger suckers from a lateral arm; much enlarged. 
Figure lc.—The same. Pen ; ventral view ; somewhat enlarged. 
Figure 2 .—Mastigoleuthis Agassizii Verrill. Front view of the beak, buccal mem¬ 
branes (6, d), and bases of the arms ; enlarged 2 diameters. 
Figure 2a .—The same. Side view of head, siphon, and anterior part of mantle, 
showing 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; p, an aquiferous 
pore (?); s, siphon; t a, base of tentacular arms; 1, 2, 3, 4, bases of corresponding 
pairs of arms. 
Figure 26.—The same. Portion from near the end of one of the tentacular arms; en¬ 
larged 16 diameters. 
Figure 2c.—The same. Suckers from the tentacular arm; much enlarged; a, side 
view; a 1 and a", front views. 
