442 A. E. Verrill — N'orth Atnerican Cephaloj^ds. 



in fig. 1 of PI. XL, with the following additions : 1, 2, 3, 4, first, second, third 

 and fourth pairs 6f sessile arms; ta, tentacular arms; d', external orifice of si- 

 phon \ ov, v', ovary, mostly concealed by the oviduct ; v o, commencement of 

 glandular portion of oviduct ; x', large gland surrounding the oviduct ; o d', ante- 

 rior portion of oviduct; op, orifice of oviduct; a; a;, pair of large, ventral, lami- 

 nated, nidamental glands ; x, pair of foUiculated and mottled accessory nida- 

 mental glands; «, one of the. urethral openings of the peritoneal membrane. 

 Figure 2. — Loligo Fealei. Embryo taken from the egg, ventral view, much enlarged ; 

 a, a, «, ventral arms, tentacular arms, and third pairs of sessile arms; c, c, eyes 

 on stout peduncles or lobes from the sides of the head; m, mantle-edge; h, 

 branchial auricles ; y, unabsorbed yolk-mass. 

 Figure 3. — The same. An embryo, within the egg, somewhat more advanced than 

 fig. 2, side view, less enlarged. The lettering is as in fig. 2, with the following 

 additions: a', second pair of arms; a", third pair; a'", tentacular arms; ft"", 

 ventral arms ; s, orifice of siphon ; o, otolith ; /, rudimentai y caudal fins. Chro- 

 mutophores are developed on the mantle. 

 Figure 4. — The same. An embryo at the period of hatching. Ventral view, en- 

 larged about 25 diameters. The yolk-sac is nearly absorbed. 

 Figure 5. — The same. A somewhat older larva, taken swimminji' at the surface. Dor- 

 sal view, enlarged about 7 diameters. The dorsal arms are still very small ; the 

 tentacular arms are the large-t ; the chromatophores are large and symmetrically 

 arranged, but only part of them are figured ; the caudal fins do not reach the 

 posterior end. 

 Figures 2 and 3 are from camera-lucida drawings of living specimens bj^ the author ; 

 4 is by J. H. Blake from life ; 1 and 5 are by J. H. Emerton, from alcoholic speci- 

 mens. 



Plates XLII, XLIII, and XLIY. 



These relate to the next article, which see. 



Plate XLV. 



Figure 1. — Lestoteuthw Fdbricii Verrill. Young. Pen, enlarged two diameters- 

 Copied from G. 0. Sars. 



Figure la. — The same. Part of odontophore. Copied from G. 0. Sars. 



Figure \h. — The same. Portion of tentacular chib, front view, enlarged. Copied 

 from G. 0. Sars. 



Figure 2. — The same. Young. General figure, dorsal view", enlarged two diameters. 

 From an American example. 



Figures 2a, 26. — The same. Front and side views of one of the suckers from the outer 

 rows of a lateral arm of the same specimen. 



Figures 2c, 2d. — The same. Front and side views of a hook-sucker from the median 

 rows of the same arm. 



Figure ?>. — Loligo Pealei. Young female. Dorsal view of a specimen taken at New- 

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



Figure 4. — The same. Young, just hatched. Yentral view, seen as a transparent object 

 from a specimen raised from the eggs, at NewT)ort, R. I.. August 5th. Much en- 

 larged ; a", a'", a"", three of the pairs of arms, showing the suckers on a"', the 

 tentacular arms; d, the beak; ?, odontophore ; e, the eye;/; caudal fin; g, 

 gill ; h, ventricle of the heart ; h\ h', branchial auricles : i. ink-bag ; m, man- 

 tle; 0, otoliths; s, siphon; s', base of siphon; f. end of intestine; «, stomach; 

 y, portion of yolk-sac, not yet absorbed. 



