[129] CEPHALOPODS OF NORTHEASTERN COAST OF AMERICA. 339 



bases of the gills, extending forward and having an oblique, oblong open- 

 ing (op, op') on the outside of the anterior ends; the posterior ones (xx, 

 xx') are behind the gills and cover th,e branchial auricles; the oblique, 

 slit-like opening is on the outer side of the posterior ends; the gland on 

 the left side {xx') was mutilated; the posterior vena cava in front of r' 

 passes through the center of the posterior gland [xx). The ovary (or) 

 is a very long organ, attached to the stomach (s) and to tbe sides of its 

 long ccecal appendage; it extends far backward to near the tip of the 

 tail, occupying the concavity of the pen (p); it consists of great num- 

 bers of small clustered folicles; connected with its anterior end, and 

 attached to the stomach, there is a convoluted tube, probably an oviduct, 

 not well shown in the figure; connected with and opening into the intes- 

 tine, near its origin, there is a firm, roundish organ, with internal lamella?, 

 perhaps a part of the stomach or gizzard (fig. 1, s). The stomach was 

 much mutilated, so that its form could not be certainly made out. What 

 appears to have been a portion of the stomach, or else the anterior part 

 of the ccecal appendage (s,s), had a cavity lined with numerous longitudi- 

 nal folds ; from this a very long, saccular, ccecal appendage, longitudinally 

 plicated within (s"), runs back, along the ovary, into the caudal cavity of 

 the pen. Tbe oesophagus had been destroyed. The intestine (?, /;) is 

 very loug and slender, internally longitudinally plicated, and externally 

 covered along nearly its whole length, on one side, by close groups of 

 small glandular folicles (/, I) ; the terminal portion is closely attached to 

 the ventral edge of the small, smooth, firm, compressed, oblong-ovate 

 liver (?'), and its free, stout anal end (h) is provided with two slender, 

 tapering cirri. The ink-sac (i') is small, pyriform, between the front 

 part of the liver and the rectum. 



The gills {g, g) are small and short, situated far forward, and con- 

 nected to the ventricle of the heart (H) by long afferent vessels {bo); 

 the branchial auricles {an, au) are rounded, without terminal capsules; 

 the ventricle of the heart {IF), as preserved, is small and four-lobed, the 

 largest lobe directed forward and passing into the anterior aorta. The 

 condition of the specimen did not permit the circulation to be much 

 studied. The two large, fusiform, cellular organs {r 1 , r') are probably 

 renal in nature; their interior is filled with large, irregular cavities or 

 lacuna?, which appear to be connected with the posterior vena? cava? {vc"). 



TAONIUS Steeustrup (restricted). 



Loligo (pars) Lesnenr, Journ. Pbilad. Acad., vol. ii, p. 96, 1821. 

 Loligopsis {pars) D'Orbigny, C<5pb. Ac6tab., p. 320 (non Lamarck). 



Gray (jmrs), Catal. Moll. Brit. Mus., vol. i, p. 39, 1849. 

 Taonius (jmrs) Steeustrup, Ovcrsigt Kgl. Danske Vidensk. Selsk. Fork., 1861, pp. 70, 



85. 

 Taonius Verrill, Trans. Conu. Acad., vol. v, p. 306, Feb., 18S1. 



This genus seems to bear about the same relation to DesmoteutMs that 

 Rossia does to Sepiola. Its relations with Loligopsis and Leachia have 

 already been discussed (pp. 301, 302). The body is short-pointed pos- 



