56 



Cypricakdinia distincta. (N. sp.) 



•Fig. 26. Fig. 27. 



Fig. 2Q.—Cypricardinia distincta. Left valve of an elongated specimen. 

 ^7.— " " Ditto of the short form. 



Bescription.—'^]iQ\\ oblong or irregularly ovate ; compressed or 

 moderately convex ; an oblique, obscure angulation extending from the 

 umbones to the posterior angle ; umbones sometimes slightly flattened 

 by an obscure depression which descends, gradually widening, to the 

 ventral margin ; beak small, closely incurved. Dorsal margin straight, 

 sHghtly concave or convex, parallel with the ventral margin or a little 

 elevated posteriorly, — usually about one-fourth shorter than the total 

 length. Ventral margin usually gently concave, but sometimes straight 

 or slightly convex. Anterior extremity usually with the lower half a 

 little projecting and rounded, concave at the mid-height or obtusely 

 rounded ; posterior extremity, with the most projecting point at the mid- 

 height or a little below, narrowly rounded or angular ; the upper hal^ 

 obhquely truncated with a straight or gently convex slope. 



Surface with wide sub-concentric rings of growth, the posterior edges 

 of which are abruptly elevated or sub-lamellose. These rings are usually 

 flat, but are sometimes slightly convex or concave. 



The largest specimen collected is seventeen lines in length ; eight lines 

 in height at the umbones, and nine lines high at the posterior end of the 

 hinge-line. All the others are shorter and proportionally higher. In 

 several specimens which have both valves in connection, the right valve 

 is the most convex. 



Looality and Formation- — Indian Cove,Gaspe ; Gaspe lime3tone,No. 8. 



MODIOLOPSIS YARIA. (N- Sp.) 



Description — Sub-ovate, obliquely depressed convex from the umbones 

 to the posterior part of the ventral 'margin, or to the lower 

 part of the anterior margin. In the greater number of the 

 specimens an obscure depression extends from the umbones to 

 the ventral margin, causing a faint sinus about the middle, or a little 

 in front thereof ; umbones about one-sixth or one-fifth the length from the 

 •anterior extremity; beaks small and apparently closely incurved- Dorsal 



