6 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 78 



Cochlostyla suhmirdbilis Mollendorf appears confined to southern 

 Luzon, ranging from the south side of Laguna de Bay to Albay 

 Province. It appears to be a species that easily responds to local 

 environment, and therefore breaks up into quite a number of races. 



These races present variations that range in shape from ovoid to 

 helicoid; some are unicolor, that is, excepting the hydrophanous 

 lines and zones, which are found on the entire surface of its shell. 

 Others may have only a dark chesnut colored area about the umbili- 

 cus, still others may have in addition a dark band at the summit. 

 A peripheral dark zone is present in some and an additional spiral 

 band of chesnut may be present between summit and periphery. 

 These spiral bands vary in width also. The most highly banded 

 form has therefor a dark umbilical area, a peripheral zone, one 

 between periphery and summit, and another at the summit. 



From north southward I recognize the following races: 



Cochlostyla suhmirabilis hanosana from the mountains near Los 

 Banos, Laguna Province. 



Cochlostyla suhmirahilis viajayjayana from the northwest water- 

 shed of Mount Banahao, Majayjay, Laguna Province. 



Cochlostyla suhmirahilis luchana from the east slope of the Mount 

 Banahao complex. 



Cochlostyla suhmirahilis taydbasana from the south slope of tlie 

 Mount Banahao complex at Tayabas. 



Cochlostyla suhmiraJjilis antimonana from the region about An- 

 timonan a little south of the middle of the western shore of Lamon 

 Bay. 



Cochlostyla suhmirahilis suhmirahilis Mollendorff from Lopez east 

 of the southeastern end of Lamon Bay. 



Cochlostyla suhmirahilis daragana from Daraga, Albay Province. 



In addition to these we will probably have to recognize a race 

 from Mount Maquiling, of which I have only dead bones too poor 

 to furnish a description. These shells are nearest related to 

 Cochlostyla 'inajayjayana. 



Another shell, also very dead, which I collected at Mariveles may, 

 if an indigenous race, need a name. It may, however, be a hermit 

 crab carried individual. 



These races may be briefly diagnosed as follows : 



COCHLOSTYLA SUHMIRABILIS BANOSANA, new subspecies 



Plate 2, Figures 1^ 



Shell small, subglobular, rather heavy, with the whorls decidedly 

 rounded. Early whorls brown, the last turn and a half yellow 

 orange, darkening toward the aperture. Peristome white, inside 

 of aperture bluish white. No dark bands are present nor is there 



