COCHLOSTYLA-CHLOR^EA. 93 



are divided into twenty sections, the series beginning with the de- 

 pressed, and ending with the elongated species. A table exhibiting 

 the characters of the sections will conclude the account of the 

 species. 



Jhe principal special authorities consulted on the Philippine 

 Island fauna are : 



Dr. C. Semper, Reisen im Archipel der Philippinen, vol. iii, Land- 

 mollusken. 



We are indebted to Semper for a vast amount of information on 

 the distribution as well as the anatomy of Philippine land snails. 



Dr. O. F. von Mollendorff, Die Landschnecken Fauna der Insul 

 Cebu, in Bericht iiber die Senckenbergische naturforschende Gesell- 

 schaft zu Frankfurt a. M., 1890. Also numerous papers published 

 in Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft. 



A most excellent paper on the shells of the island Zebu. 



J. G. Hidalgo, Obras Malacologicas, parte I, Estudios preliminares 

 sobre la Fauna Malacologica de las Islas Filipinas, in Memorias de 

 la Real Academia de Ciencias Exactas, Fisicas y naturales de 

 Madrid, xiv. Also papers by the same author in the Journal de 

 Conchyliologie. 



Of Sr. Hidalgo's Estudios, etc., only 160 pages, 30 plates, have as 

 yet (Sept., 1891) been published, containing of the genus Cochlostyla 

 only Corasia, Axina and part of Chlorcea. This magnificent work 

 will when completed, leave little to be desired as far as the illustra- 

 tion of the shells is concerned. The text is of equal merit, being 

 characterized by a broad conservatism, and excellent judgment in 

 the treatment of species. 



Section I. CHLORCEA Albers, 1850. 



Chlorcea ALB., Die Hel., p. 113. v. MART, in Albers, 2d. edit., 

 p. 169, (type H. sirena Beck). SEMPER, Reis. Archip. Phil., Land- 

 moll., p. 226, (in part.) 



Imperforate, varying from depressed-globose to lens-shaped, 

 generally solid ; whorls 4-5, the last descending or not ; lip decidedly 

 reflexed, at least below. Entire surface showing under a lens 

 excessively fine, close spiral lines; lacking hydrophanous patches on 

 the cuticle. 



Anatomy as in Cochlostyla generally, except that the simple 

 mucus gland is aciniform, not globular* C. sirena has a short 

 flagellum on the penis. 



