1901.] MOLLTJSKS FBOM THE PBESIAN GULP. 377 



Cebithiopsis angasi Semper ( = claihrata Angas). 

 I. Karachi. Also lat. 18° 58' N., long. 71° 45' E. 

 The type is Australian, but we cannot separate it. 



Cebithiopsis pagodulus A. Ad. 



I. Karachi. Eocks at low tide. Also from Japan. 



Cebithiopsis pulchbbbima Melv. 

 I. Bombay (Abercrombie). 



Cebithiopsis EUBEicnsrcTA Melv. 



I. Karachi. Found at low tide amongst loose rocks, mud, and 

 algae. Bombay (Abercrombie). 



Cebithiopsis sykesii Melv. 



I. Karachi. Found with 0. rubricincta. Bombay (Aber- 

 crombie). 



Cebithiopsis (Seila) bandobensis Melv. 

 M.C. Charbar. 



I. Karachi. Found at low tide amongst rocks and algae. 

 Bombay (Abercrombie). 



Cebithiopsis (Seila) HiNDnoBUM Melv. 

 M.C. Charbar. 



I. Karachi, especially near Manora, abundant, varying much 

 in colour from pale to dark brown. (Andaman Isles, Booley.) 



Fam. Planaxid^e. 



Plan AXIS beeviculus Desh. 

 Var. tessellata G. Nevill. 

 P.G. (W. T. Blanford in G. Nevill). 



Planaxis lineatus Da Costa. 



Var. labiosus A. Ad. 

 I. Karachi. 



Planaxis nigeb Quoy ( = P. similis Sm.). 



I. Karachi. Bombay (Abercrombie ; Rev. S. B. Fairbank). 



Plan axis sclcatus Born. 



P.G. E-ishire. Common on rocks at half-tide. 



I. Bombay (Abercrombie ; Olivier). Abundant in similar 

 situations. 



Var. savignyi Desh. (sp.). 

 P.G. {W. T. Blanford). 

 M.C. Often found, though locally, on rocks at low tide. 



Var. subnigra G. Nevill. 

 P.G. Gulf of Oman, Hormuz and Maskat (W. T. Blanford). 



