Vol. 31, pp. 199-202 December 30, 1918 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



THREE NEW PHILIPPINE ISLAND LAND SHELLS. 



BY PAUL BARTSCH.* 



Among a sending of land shells from Palawan and the adja- 

 cent islands, transmitted to the U. S. National Museum for 

 determination, are three new forms that require names, which 

 are here bestowed. 



Camaena trailli weberi, new subspecies. 



This race strongly resembles Camaena trailli bugsukensis in outline 

 and coloration but is a giant in comparison. The two specimens before 

 me, Cat. No. 219,056, U. S. N. M.,were collected by Mr. Weber at Buli- 

 likan, on the extreme tip of southern Palawan. They yield the following 

 measurements: 



The second specimen is considerably paler than the first and the median 

 band on the upper surface of the whorls is less pronounced. When com- 

 pared with Camaena trailli trailli Pfr., which is said to have come from 

 Palawan Passage (the specific island is not yet known), it is at once dis- 

 tinguished by the much weaker axial sculpture, which consists of mere 

 lines of growth. In Camaena trailli trailli this is specialized into slender 

 irregularly disposed wavy retractively slanting threads. 



Mr. Weber states that these mollusks are found crawling on trunks of 

 trees during rainy weather, seldom near the sea, and that specimens 

 from the foothills grow larger than those of lower levels. 



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



47— Pkoc. Biol. Soc. Wash., Vol. 31, 1918. 



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