426 



BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



width encircling the turns. One of these is almost on the middle 

 between the suture and summit, and the other one is about the same 

 distance below the periphery on the base. Interior of the aperture, 

 expanded peristome, and columella white. The band on the middle 

 of the turns extends to the nuclear whorl, slowly fading posteriorly. 

 Nuclear whorls 2, well rounded, marked by incremental lines and the 

 last half of the last turn by fine spiral striations. The postnuclear turns 

 are inflated, well rounded, appressed at the summit, and marked by 

 retractively slanting lines of growth and numerous microscopic spiral 

 striations, which are stronger on the first postnuclear turn than on the 

 rest and quite feeble on the base. Aperture almost subcircular; the 

 peristome of the outer lip expanded and reflected; columella rather 

 slender, slightly excavated. 



The type (U.S.N.M. no. 313629), collected by C. Canonizado at 

 Sibolon Island, Mindoro, has 5.3 whorls and measures: Length, 27.2 

 mm; greater diameter, 26.1 mm; lesser diameter, 22.2 mm. 



Three of the other five specimens (U.S.N.M. no. 313630) are adult. 

 They have the following measurements: 



This race can readily be distinguished from typical Cochlostyla 

 (Cochlodryas) mateoi mateoi by its very thin shell and broader form, 

 as well as paler coloration. 



COCHLOSTYLA (COCHLODRYAS) MATEOI, subspecies (?) 



1851. Helix tenera Reeve, Conchologia iconica, pi. 16, fig. 62a. 



1896. Cochlostyla tenera Elera, Catalogo sistematico de toda la fauna de Filipinas, 



vol. 3, p. 585; in part. 

 1901. Cochlostyla tenera Hidalgo, Obras malacologicas, pp. 462-463 (in part), 



pi. 118, fig. 4. 

 1911. Cochlostyla (Cochlodryas) tenera Mollendorff, Kobelt, and Winter, 



Semper's Reisen im Archipel der Philippinen, vol. 10, pp. 250-251 (in 



part), pi. 51, figs. 7, 7a. 



Reeve and Hidalgo figured a specimen that has a bright buff 

 peripheral band and an almost black band immediately posterior to 

 this and anterior to it. I have not seen specimens with this coloration. 

 It is possible that this may represent a distinct race, but I call it 

 merely mateoi subspecies (?). I am copying their figures. 



