334 



1. Pseudhelicarion compactus Quad, and Mllf. 



2. Hemiglypta blainvilliana Lea. 



3. Rhysota ovum Val. 



4. Obba listeri Gray. 



5. Obba planulata Lam. 



6. Eulota fodiens Pfr. 



7. Chloraea fibula Brod. 



8. Helicostyla cepoides Lea. 



9. Helicostyla pithogastra Fer. 

 10. Helicostyla cincinniformis Sby. 



PI. 17, fig. 3. 



Helix cincinniformis Sby. 1841, Proc. Zool. Soc. London, p. 

 17; Bulimus cincinniformis Pfr. 1848, Monogr. 2, p. 9; Pfr. 

 1850, Conchyl. Cab. 1, pt. 13, sec. 1, p. 181, pi. 53, fig. 6, 7; 

 Reeve 1849, Conch. Icon. 5, pi. 6, fig. 28; Desh. in Fer. 1850, 

 Hist., pi. 157, fig. 3, 4; Helicostyla cincinniformis Pils. 1892, Man. 

 of Conch., 8 ser. 2, p. 18; Cochlostyla cincinniformis Semper 

 1912, Reis. im Arch, der Phil., 10, p. 262; C. cincinniformis 

 unitaeniata Mllf. Semper 1912, op. cit., p. 263, fig. 6. 



The form Cochlostyla cincinniformis unitaeniata Mllf. refers 

 to a figure representing a typical specimen of H. cincinniformis, 

 and therefore is an absolute synonym. 



H. cincinniformis appears to be the most abundant form of 

 this group on Lubang. 



11. Helicostyla cincinniformis lubanensis, var. nov. 



PL 17, fig. 1. 



This variety is very distinct from Helicostyla cincinniformis 

 Sowerby as figured by Pilsbry (Man. of Conch, part 2, vol. 8, 

 p. 18, 1892, pi. 6, fig. 21, 22, 24) in being without the dark brown 

 bands at the periphery, at the base, and at the sutures. A few 

 specimens, however, show a slight tendency towards producing 

 mikado brown bands at the periphery and suture, but in some 

 individuals these are obsolete. 



Description. — Shell imperforate, ovate-conic, moderately thin, quite trans- 

 parent in young specimens. White or ivory yellow, the latter color being 

 usual in young specimens, while in adults it is chiefly present in the parietal 

 region. Mikado brown subsutural and peripheral bands present in some 



