PLATE XXXIV. 



1. Solenomya parallela- Side view of type, which is a cast, 

 showing the adductor impressions, impressions of the shell plica- 

 tions and the indication of the pallial line. 



2. Solenomya trapezoides. 



2a. Side view of left valve. The anterior adductor scar is 

 somewhat exaggerated as is also the pallial line in front 

 (to the left) of the fragment of shell which remains on 

 the cast. The shell has traces of fine radiating strise, 

 which are suggested in the figure. They appear to 

 radiate from the beak. 



2b. Dorsal view of another specimen with the inner portion 

 of the shell still remaining on the specimen. The pos- 

 terior part is more crushed on the part immediately 

 behind the beaks than represented in the figure, which 

 may give a slightlv incorrect idea of the shell. 



3. Monopie7-ia? subalaia. 



3a. Side view of a left valve of one of the two type speci- 

 mens. 



3b. Side view of the right valve of the other type specimen. 

 The curve from the anterior to the ventral margin is a 

 little full. Both in Mr. Rogers' collection. 



4. Yoldia glaba. 



4a. Side view of type. 



4b. Surface markings of the same enlarged. On the anter- 

 ior margin there are additional marks of growth not 

 indicated here. Specimen in^Mr. Rogers' collection. 



5. Niiciila piilcJiella. 



5a. Side view of type, considerably enlarged. 

 5b. End view of same, similarly enlarged. 

 3c. Surface markings much more enlarged. Type in Mr. 

 Rogers' collection. 



