A. E. Verrill — JYorth American Cephalopods. 439 
Figure 5a. — Posterior end of the same pen. 
Figure 6. — The same specimen. Connective cartilage from base of the siphon, natural 
size. 
Figure 7. — The same specimen. Transverse sections of arms; a, of dorsal; b, of 2d 
pair ; c, of third pair, natural size. The suckers are omitted. 
Figure 8. — The same specimen. Rims of suckers of sessile arms, enlarged 1-J- diameter ; 
a, a', side and front views of the 15tli and 13th sucker of a ventral arm; b , V, 
side and front view of one of the largest suckers of a lateral arm ; c, c', a dorsal 
sucker of a dorsal arm. 
Figure 9. — Part of border of one of the larger suckers (12th) of the second pair of 
arms, more enlarged, showing part of the dentate edge of the horny rim, with 
a portion of the circle of small plates, attached to the membranous border. 
Figure 10. — Octopus Bairdii V. Spermatopliores. A, one with the inner sac ( S ) 
partly extruded ; i, the point from which the extension commences, natural size • 
B, another spermatophore in its original condition; a, filament at large end ; b , 
filament at small end. 
Plate XXXYII. 
Figure 1. — Loligo Pealei Les. Female specimen from Vineyard Sound. Pen, natural 
size and represented as flattened to show the full width of the thin portion. 
Figure 2. — Loligo Pealei , var. borealis. Female specimen, from Annisquam, Mass. 
Pen, natural size, represented in the same manner. 
Figure 3. — Loligo Pealei. Pen of a young specimen from Yinejmrd Sound, natural 
size. Represented in the same way. 
Figure o.—Hi-stioteuthis Collinsii Y. Teeth of the odontophore, isolated and enlarged 
25 diameters; a, median; b inner lateral; c, and d. outer laterals ; e, marginal 
plate ; h. g. aud f ocher views of the lateral teeth. The teeth are not drawn in 
their natural positions. 
Figure 6. — Loligo pallida Y. Part of teeth of the odontophore, enlarged 50 diameters ; 
a, median tooth, front view; c, next to outer lateral teeth; d, outer lateral teeth; 
e, marginal plates ; all are in their natural positions, except a. 
Figure 7. — Sthenoteuthis pteropus V., from Bermuda. Isolated teeth from odontophore, 
enlarged 25 diameters; a. median teeth, front view; b, inner lateral ; c, middle 
lateral: d , outer lateral tooth. 
Figure 8. — Ommastrephes illecebrosus Les., from Eastport, Me., part of the teeth of the 
odontophore in their natural positions, enlarged 25 diameters; a. median teeth; 
b and b’, inner lateral teeth ; c, middle lateral teeth ; d , outer lateral teeth. 
Figure 9. — loligo Pealei , var. pallida Y. Female, from Ansonia, N. Y. Tenth 
sucker of the third pair of arms ; a , lateral, and b, front view, enlarged 2 
diameters. 
Figure 10. — The same. Male, from Ansonia. Suckers enlarged 2 diameters; a, front 
view of tenth, from third arm : b , side view of same ; c, side view of horny rim 
of fifth large sucker of tentacular club ; of, front view of the same. 
Figure 11. — Jjoligo Pealei, var. pallida. Female. (Same specimen as figure 9.) 
Fifth large sucker of tentacular arm ; e, side, and f front view. Enlarged 2 
diameters. 
Figures 5-8 are from camera-lucida drawings by the author; the others arc by J. 
H. Kmerton. 
