498 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



lines, the last one by stronger lines of growth. In fact, on this whorl 

 the sculpture is as strong as that of the postnuclear turns. The post- 

 nuclear whorls are appressed at the summit, moderately strongly 

 rounded, and marked by retractively slanting, incremental lines, 

 which almost assume the strength of threads. They are rather irreg- 

 ular in strength and spacing. In addition there are rather coarse, 

 incised spiral lines and the usual fine crisscross sculpture, which is 

 extremely reduced in this race but is present on both spire and base. 

 The periphery is feebly angulated, and the base is inflated and strongly 

 rounded. The aperture is broadly oval. The peristome is decidedly 

 expanded and reflected, the inner lip being reflected to form a moder- 

 ately large umbilicus. The parietal wall is covered by a thin trans- 

 lucent callus. 



This subspecies is distinguished from Cochlostyla (Chrysallis) 

 roseolabra rosea by having the color of the lip and the general colora- 

 tion much paler, as well as by the presence of incised spiral lines. 



The type (U.S.N.M. no. 313677), collected by Pedro de Mesa at 

 Calawagan, Paluan, Mindoro, has 5.9 whorls and measures: Length, 

 60 mm; greater diameter, 31.5 mm; lesser diameter, 27.9 mm. 



Six topotypes (U.S.N.M. no. 313678) and 18 additional specimens 

 yield the following measurements: 



U.S.N.M. no. 



Number of 

 whorls 



313678. 

 313678. 

 313678. 

 313678. 

 313678. 

 313678. 

 313646. 

 313646. 

 313646. 

 313646. 

 313646. 

 313646. 

 313646- 

 313646- 

 313646. 

 313643. 

 313643. 

 313643. 

 313643. 

 313643. 

 313679. 

 313679. 

 313679. 

 313679. 



Average _ 

 Greatest. 

 Least 



6. 1 

 5. 9 

 5. 1 

 5.2 

 5.7 

 5.9 

 5.8 

 6.4 



Length 



5. 3 

 5.2 

 5.5 

 6.0 

 5.9 

 5.4 

 5.2 

 5.0 

 5.3 

 5.7 

 5. 1 



5. 58 



6.4 



5.0 



Mm 



62. 7 

 55. 1 

 45.2 

 54.5 

 56.3 

 54.9 



51. 5 



63. 5 



52. 1 

 61. 5 

 58.0 



5 

 6 



48. 



53. 



49. 6 



46.4 



53.0 



57.9 



56. 9 



47. 5 



50.3 



45. 1 



46.9 



49. 6 



50. 2 



52. 95 

 63.5 

 45. 1 



Greater 

 diameter 



Mm 

 31.0 



25. 1 



26. 4 

 29.9 

 28. 5 

 27.9 

 26. 6 

 31.7 

 25.4 

 32. 3 



24. 7 

 26.0 

 26.8 

 29.7 



25. 6 

 28.8 

 26.4 

 27.7 



26. 3 

 28. 5 



27. 

 27.0 

 25. 9 

 28.0 



Lesser 

 diameter 



27. 6 

 32. 3 

 24. 7 



Mm 

 26. 6 

 23.0 

 24.0 

 26. 1 

 25. 1 

 24. 6 

 23.3 

 27.2 

 23.0 

 28.4 

 24. 8 

 23.2 

 24.8 

 25.2 

 23.4 

 26.4 



22. 

 24. 1 

 23.0 

 25.2 

 24. 3 

 23.6 



23. 7 



24. 1 



24. 5 

 28. 4 

 22.0 



