190 



THE PTEROPODA 



I have referred to this species all the specimens with 

 long, slender, straight shells. In a few cases the shell is 

 however very slightly and irregularly curved, without ex- 

 hibiting the least resemblance with the distinct and regular 

 curvature as occurring in the typical C. virgula. 



Genus 2'. Hy alocylix Fol. 



Species 1. Hy alocylix striata (Rang). 

 Animals : 



Mediterranean (Sicily), date?, 5 sp., Cantraine. 



Indian Ocean, August '06, 1 sp.. Buitendijk. 



Java-Sea, May '06, 1 sp., // 



Notes from the Leyden ]Museura, Vol. XXIX. 



