Vol. 31, pp. 181-188 December 30, 1918 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



NEW MARINE MOLLUSKS FROM THE PHILIPPINE 



ISLANDS. 



BY PAUL BARTSCH.* 



Among a lot of marine mollusks submitted to the United 

 States National Museum for determination by correspondents 

 from the Philippine Islands, are a number of new forms. Most 

 of these were discovered by Mr. C. M. Weber, in the southern 

 Palawan region, while the beautiful little Columbella deveyrai 

 comes from the Batanes Island, in the northern end of the 

 Archipelago. 



Oliva episcopalis philippinensis, new subspecies. 



Two Olivas, Cat. No. 219,048, U. S. N. M., collected by Mr. Weber at 

 Bancalan and Balabac Islands, differ decidedly from the typical form, 

 being much smaller and more elevated and also more darkly colored. I 

 therefore believe that they merit subspecific distinction. Both of them 

 have lost the extreme tip. 



The type has seven whorls remaining, and measures: length, 41. S mm.; 

 diameter, 17.1 mm. The other specimen, which has 6.5 whorls remaining, 

 measures: length, 40.6 mm.; diameter, 17.5 mm. 



Oliva tricolor palawanensis, new subspecies. 



Mr. Weber has sent us two very remarkable shells from Roughton 

 Island, Collector's No. 83A, Cat. No. 219,049, U.S. N. M. These, while 

 agreeing with Oliva tricolor in outline, completely lack the olive green 

 ground color peculiar to that species. This is replaced by a creamy white 

 tint; the rest of the markings are axial rows of dots of yellow and blue. 

 The maculations on the spire are similar to those of the typical form. The 

 interior is deep purple. This form is so striking that I deem it desirable 

 to bestow a name upon it. 



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



44— Proc. Biol. Soc. Wash., Vol. 31. 1918. (181) 



