130 



Figure. 



Psammotella Ruppelliana. PI. 38. Pig. 205. Shell of violet colour 

 beneath an olive epidermis, with right valve dropped to show the ob- 

 long callosity. 



Genus 9. CAPSA, Brtcguiere. 



Animal; undescribed. 



Shell ; transversely oblong, somewhat square, a little gaping at the 



ends, inequilateral ; hinge composed of two central teeth in 



each valve. 



This genus contains only the Linnean Venus deflorata, a native of the 

 Eastern Seas, well known in collections, and another very closely allied 

 species from Tahiti. In both species the shell has a densely rasped crenated 

 surface. It is not the genus Capsa of Lamarck ; for that, the name Iphi- 

 genia, Schumacher, has been revived. 



Species. 

 1. deflorata, Linn. 2. Taheitensis, Bernardi. 



Figure. 



Capsa deflorata. PI. 38. Fig. 211. Shell, with left valve dropped, 

 showing its densely rasped crenated exterior and lunge. 



Genus 10. CAPSELLA, Beshayes. 



Animal ; undescribed. 



Shell ; transversely oblong, nearly equilateral, with the posterior 

 side somewhat squarely truncated ; hinge composed of one tooth 

 in the left valve and tivo in the right valve, bifurcated, with a 

 slight oblong callosity in each supporting the ligament. 



Another genus established lately by M. Deshayes while investigating the 

 Cumingian collection of Nymphacece. It includes sixteen species, all from 

 the Eastern Seas, intermediate in character between Capsa and Soletellina, 



