336 



Holotype.—M. C. Z. no. 79169. Paratypes — M. C. Z. no. 79170. Re- 

 ceived from P. de Mesa June, 1929, who collected them in Lubang, P. I. 



Remarks. — This variety differs from H. cincinniformis as well 

 as the two previous varieties in being smaller and squatter. 

 There is a complete lack of the dark brown bands of the 

 straight species, but instead a new element comes in, viz., the 

 seal brown wash on the body whorl. This, too, is the color 

 of the supersutural and subsutural bands, while the usual 

 hydrophanous yellow spots appear at the angle of the body 

 whorl, and on the upper and lower margins of the suture. 



14. Helicostyla cincinniformis demesana, var. nov. 



PI. 17, fig. 5. 



Description. — Shell squat, ovate-conic, rather thin; nuclear whorl cacao 

 brown; ground color of shell white, having cacao brown bands on the periphery 

 of the body whorl, above and below the sutures, and at the base around the 

 columella. In addition, as in the previously described variety, there is a 

 seal brown wash which covers the lower two-thirds of the body whorl as 

 far as the base. Bands, subsutural, supersutural and peripheral, tessellated 

 with cartridge buff hydrophanous spots, absent, however, in the region of 

 the nuclear whorl. 



Nuclear whorl less flattened than in the previous variety. Whorls 5, 

 body whorl being rather angulate medially. 



Aperture widely quadrate, forming a broad angle at the juncture of the 

 columella and parietal wall. Peristome thin, narrow, rather sharply reflected, 

 tinted with cacao brown. Columella as in previous variety straight, thin, 

 slightly constricted where it blends with the peristome. 



Alt. Diam. Ap. Length Ap. Width 



35.5 



25.5 



17 



13.5 mm. 



31.5 



24.5 



16 



12 



32.5 



24 



15.5 



11 



32.5 



25.5 



16.5 



13 



32.5 



23.5 



15.5 



11 



Holotype, M. C. Z. no. 79171 

 Paratype, M. C. Z. no. 47216 



Archer collection 4801. 



Holotype. — M. C. Z. no. 79171; received from P. de Mesa, June, 1929, who 

 collected it in Lubang, P. I. 



Remarks. — This variety differs from H. cincinniformis in its 

 smaller size, and its squattiness. Morphologically it is like the 

 previous variety, H. cincinniformis ultima. Moreover it has 

 the same seal brown wash on the body whorl, but resembles the 

 typical form in having the same set of bands. 



