430 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 

 COCHLOSTYLA (COCHLODRYAS) DECORA (Adams and Reeve) 



Plate 100, Figures 4, 5 



1850. Helix decora Adams and Reeve, The zoology of the voyage of H. M. S. 

 Samarang, p. 62, pi. 16, fig. 7. 



1852. Helix decora Reeve, Conchologia iconica, pi. 105, fig. 586. 



1853. Helix decora Pfeiffer, Monographia heliceorum viventium, vol. 3, p. 178. 



1854. Helix decora Pfeiffer, Martini-Chemnitz Conchylien Cabinet, ed. 2, 



vol. 1, Abt. 12, Theil 3, pp. 401-402, pi. 144, figs. 18, 19. 



1855. Acavus (Tachea) decorus H. and A. Adams, The genera of recent Mollusca, 



vol. 2, p. 195. 



1856. Helix decora Pfeiffer, Malakozool. Blatter, vol. 2, p. 145. 



1859. Helix decora Pfeiffer, Monographia heliceorum viventium, vol. 4, p. 202. 



1860. Helicostyla decora Martens, Albers, Die Heliceen, ed. 2, p. 175. 



1868. Helix decora Pfeiffer, Monographia heliceorum viventium, vol. 5, p. 270. 

 1876. Helix decora Pfeiffer, Monographia heliceorum viventium, vol. 7, p. 578j 



in part. 

 1892. Cochlostyla decora Pilsbry, Man. Conch., ser. 2, vol. 7, p. 133, pi. 52, figs. 



23, 24. 

 1895. Helicostyla decora Pilsbry, Man. Conch., ser. 2, vol. 9, p. 122. 



1897. Cochlostyla decora Hidalgo, Journ. Conchyl., vol. 44, pp. 278, 331, 340, 352. 



1898. Cochlostyla decora Mollendorff, Abh. Naturf. Ges. Gorlitz, vol. 22, p. 



122; in part. 

 1904. Cochlostyla decora Hidalgo, Obras malacologicas, p. 470, pi. 48, fig. 4. 

 1910. Cochlostyla decora Mollendorff, Kobelt, and Winter, Semper's Reisen 



im Archipel der Philippinen, vol. 10, p. 206; in part. 

 1932. Cochlostyla (Cochlodryas) decora Bartsch, Journ. Washington Acad. Sci. r 



vol. 22, p. 337. 



Shell imperforate, conoidal globose, pale straw color, covered with a 

 fawn-colored epidermis, obliquely striated; whorls 4, rather flattened, 

 the last faintly keeled; aperture lunar orbicular, white within, lip 

 reflected, white, shining. 



Habitat: Island of Mindoro, Philippines. 



I have not seen specimens of this species. Von Mollendorff seems 

 to think that he has recognized this species in shells from the Island 

 of Romblon, but I am inclined to disagree with von Mollendorff. 

 The fact that he did not rediscover it in Mindoro is not at all sur- 

 prising, because little work has been done to date in the southwestern 

 portion of Mindoro, and it is more than likely that when an ardent 

 collector combs this part of the territory visited by the Samarang, 

 the species will be rediscovered. This has been true of most of the 

 shells that were originally stated to come from a locality or from an 

 island, and whose names were later transferred to other races from 

 other islands. I therefore prefer to copy Adams and Reeve's de- 

 scription and figure. 



Subgenus Steatodryas Pilsbry 



In this subgenus the shell is of inflated turbinate shape and rather 

 thin. The whorls are many, inflated, strongly rounded, and closely 



