53 



liquely truncated ? umbones and beak as indicated by the cast moderate, 

 situated at one-third the length from the anterior extremity. Behind the 

 umbones there are two conspicuous concave plications, one of which has 

 its upper side close to the hinge-line and extends from near the umbones 

 backwards to the posterior angle ; the other is below and separated from 

 the former only by an angular ridge. Just in front of the umbones there 

 is a deep narrow fissure extending downwards one-fourth the height of the 

 shell ; in front of the umbones a smaller fissure on each side of the hinge- 

 line. Length 8 lines ; height at the mid-length 5 lines ; depth of both 

 valves 3 lines. Junction Chff ; Div. 1, A. G. J. Richardson. 



This species has the form of a Cleidophorus, but the occurrence of two 

 pairs of fissures induces me to dispose of it as above. 



Genus Conocardium, Bronn. 



C. ELEGANTTJLUM, n. sp. — Shell Small, short, strongly carinated from 

 the beaks to the ventral angle. Posterior extremity depressed sub-conical 

 to the base of the siphonal tube ; the slope of the surface gently concave ; 

 acutely carinated from the tube to the angle below, the carina being formed by 

 the junction of the edges of the valves. This part is ornamented with ten or 

 twelve fine stride rmining from the beaks downwards to the margin. From the 

 beaks a strong rounded ridge runs to the ventral angle and separates the 

 posterior from the anterior extremity. This ridge is sub-angular along its 

 crest and has its posterior edge formed by a sharp raised line. It is 

 minutely striated transversely. The anterior extremity is a depressed 

 oblique cone with its apex formed by the extremity of the hinge-line ; 

 minutely striated, the strijB running up the cone. Placing the shell with 

 the hinge-line downwards the contour on a side view is that of an acute 

 angled triangle, the apex, slightly truncated, being the ventral angle. On 

 an end view the outline is perfectly cordiform. Length from the umbones 

 to the ventral angle a little more than 3 lines ; length of the hinge-line 

 apparently about 2J lines ; depth of both valves 3 lines. 



This little shell by its strongly carinated sides is alHed to C. ornatum 

 Winchell and Marcy, Op. cit., p. "ill, pi. II, fig. 15. The carinated portion 

 is, however, much narrower and more minutely striated. The striae can 

 only be seen with a glass magnifying 30 diameters. The markings on 

 the extremities are just visible to the naked eye. 



South-west Point ; Div. 4, A. G. J. Richardson. 



GASTEROPODA. 



Genus Subulites, Conrad. 



S. Elongata, Conrad. — Occurs at Gamache Bay ; Div. 1, A. G. Also 

 in H. R. 



