Vol. 32, pp. 177-184 September 30, 1919 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



CRITICAL REMARKS ON PHILIPPINE ISLAND LAND 



SHELLS.' 



BY PAUL BARTSCH. 





Large sendings from Palawan and the adjacent regions have 

 made it necessary to overhaul the groups of Cochlostyla typified 

 by Pfeiffer's cinerosa and palavanensis. The results of this 

 inquiry are in part given below. These sendings, mostly col- 

 lected by Mr. C. M. Weber, have also made it necessary to 

 recognize two additional races of Amphidromus versicolor which 

 come from the heretofore unexplored islands of Secam and Cana- 

 bungan. These are here described. A third subspecies of 

 Amphidromus, from the island of Mindanao, received some time 

 ago from Mr. Walter F. Webb, which belongs to the Amphi- 

 dromus maculiferus group, is added. 



Cochlostyla cinerosa cinerosa Pfeiffer. 



1855 Bulimus cinerosus, Proc. Zool. Soc. London, p. 107, pi. 32, f. 5. 



Pfeiffer's specimens, he states, were collected by Dr. H. E. I. C. Traill in 

 Palawan Passage, near Borneo. The definite island from which they came 

 is not stated and none of the specimens in our collection from the Philip- 

 pines agree exactly with Pfeiffer's description or figure, although they 

 plainly belong to the same complex. The fixing of the type locality for 

 this subspecies will therefore have to await future sendings. Pfeiffer states 

 that the type has 5 whorls and measures: altitude, 36.5 mm.; diameter, 

 13 mm. 



Cochlostyla cinerosa trailli Pfeiffer. 



1855 Bulimus trailli, Proc. Zool. Soc. London, p. 107, pi. 32, f. 6. 

 The above description and figure depict a very dark shell with a light 

 band at the summit. It is quite possible that the lighter epidermis was lost 

 in this specimen and that only the sutural band remains. However, there 

 is also considerable difference in general shape, so that we shall consider it 

 i Published by permission of the Secretary of the Smithsonian Institution. 

 36— Pboc. Biol. Soc. Wash.. Vol. 32, 1919. (177) 



