446 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [236] 



Figure 5. — The same. A somewhat older larva, taken swimming at the surface. 

 Dorsal view; enlarged ahout 7 diameters. The dorsal arras are still very small ; 

 the tentacular arms are much the largest ; the chromatophores are large and sym- 

 metrically arranged, hut only a part of them are shown in the figure ; tte caudal 

 fins do not reach the posterior end. 



Figure 6. — The same. Young female. Dorsal view of a specimen taken at Newport, 

 R. I., in August. Enlarged 2 diameters. From a fresh specimen. 



Figure 7. — The same. One of the egg-capsules, slightly enlarged. 



Figure 8. — The same. A very young embryo, earlier than figure 1 ; dorsal view ; a, 

 rudiments of the arms; o, otoliths; s, inner folds of the siphon; g, rudiments of the 

 gills; c, "eye-stalks," or swellings of the sides of the head; m, mantle; p, shell- 

 area; y, yolk. 

 Figures 1 and 2 are from camera-drawings by the author; figure 8 is copied from 

 Brooks; the rest are by J. H. Emerton. 



Plate XXXI. 



Figure 1. — Loligo Peald. Portion of middle of club, showing the four rows of suck- 

 ers; enlarged 4 diameters. From an individual having larger suckers than usual. 



Figure 2. — The same. Portion of the middle of the tentacular club of a specimen 

 from the same lot and of nearly the same size as figure 1, but having small tentacu- 

 lar suckers; enlarged 4 diameters; a, a', largest median suckers; b, b', lateral suck- 

 ers. 



Figure 3. — The same. Portion of the homy ring and marginal denticles of one of the 

 large median suckers of the tentacular club; much enlarged. 



Figure 4. — Loligo breris Bv. Female. Dorsal view; natural size. 



Figure 4a. — The same specimen. Pen; natural size. 



Figure 4&. — The same. Portion of horny ring and raaiginal scales of one of the large 

 tentacular suckers ; much enlarged. 



Figure 4c. — The same sucker; less enlarged ; front view. From a mounted specimen 

 which, by contracting, has everted the denticulated border of the rim. 



Plate XXXII. 



Figure 1. — Chirotettthis larertosa Verrill. Oneof the tentacular arms, outerside; natu- 

 ral size. 



Figure la. — The same. Front view of club ; enlarged 2 diameters. 



Figure 16. — The same. One of the suckers, front view ; enlarged 10 diameters. 



Figure 2. — Loligo Pealei, var. lorealis. Female, in the breeding season. Ventral view; 

 about l natural size. The mantle has been cut open nearly in the median line and 

 the peritoneal membrane partly removed. The lettering is the same as in figure 1 of 

 PI. XXIX, with the following additions: 1, 2, 3, 4, first, second, third, and fourth 

 pairs of sessile arms : t a, tentacular arms; d', external orifice of siphon; o v, ov', 

 ovary, mostly concealed by the oviduct ; v o, commencement of glandular portion of 

 oviduct; x', large gland surrounding the oviduct; od', anterior portion of oviduct; 

 op, orifice of oviduct; xx, pair of large, ventral, laminated, nidamental glands; x, 

 pair of folliculated and mottled, accessory nidamental glands; w, one of the ureth- 

 ral openings of the peritoneal membrane. 



Figure 3. — The same. Section of gill; enlarged about 8 diameters; a, one of the 

 lamelte with the efferent vessel aloug its edge; a', its outer end; bo, the main 

 efferent or branchio-cardiac vessel, returning the blood to the heart ; b v, the main 

 branchial vein, or efferent vessel; b, one of the branches supplying a lamella; v, 

 another vein in the muscular stem, c; d, membrane uniting the gill to the mantle; 

 e, membrane running across the dorsal side of the gill. 



