422 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



COCHL03TYLA (COCHLODRYAS) MATEOI Bartsch 



1932. Cochlostyla (Cochlodryas) tnateoi Bartsch, Journ. Washington Acad. Sci. P 

 vol. 22, p. 337. 



Shell subglobular. The nuclear whorls white or pale brown, de- 

 pending upon the subspecies in question. The postnuclear whorls 

 are marked by a broad median brown band and a broad brown band 

 of the same shade at some little distance below the periphery. The 

 columellar area may or may not be dark. On the last whorl there is 

 usually a greenish band near the summit, and the base, with the excep- 

 tion of the brown band referred to above, is green or greenish. This 

 green color is usually intensified at the periphery, where it assumes 

 the strength of a terminal band. The interior of the aperture is white, 

 showing the dark bands within. The peristome and columella are 

 also white. Nuclear whorls about 2, flattened, well rounded, marked 

 by retractively slanting axial riblets and the last one by fine, closely 

 spaced, spiral striations. The postnuclear whorls are almost flattened, 

 well rounded, appressed at the summit, and marked by retractively 

 slanting lines of growth and microscopic spiral striations, which are 

 closely spaced and present on both spire and base. The suture is 

 moderately constricted; the periphery inflated and strongly rounded; 

 base moderately long, inflated and rounded; the aperture is subcircular; 

 the outer lip broadly expanded and reflected. The columella is 

 moderately broad, reflected over the base as a white callus. A thin 

 callus covers the parietal wall. This species, formerly known as tenera, 

 is distributed over eastern Mindforo and is present on some of the 

 islands lying southeast of Mindoro. 



The following key will help distinguish the forms: 



KEY TO THE SUBSPECIES OF COCHLOSTYLA (COCHLODRYAS) MATEOI 



Green coloration intense mateoi 



Green coloration not intense, but pale sibolonensis 



COCHLOSTYLA (COCHLODRYAS) MATEOI MATEOI Bartsch 



Plate 99, Figures 7, 8 



1841. Helix (Cochlogena) tenera Soweuby, Proc. Zool. Soc. London, 1840, p. 102; 



not Helix tenera Gmelin, Systema naturae, ed. 13, vol. 1, pt. 6, p. 3653, 

 1791, nor Helix tenera Hartmann, Neue Alpina, p. 232, 1821. 



1842. Helix tenera Pfeiffer, Symbolae, vol. 2, p. 40. 



1848. Helix tenera Pfeiffer, Monographia heliceorum viventium, vol. 1, p. 



228; in part. 

 1850. Helix tenera Pfeiffer, Martini-Chemnitz Conchylien Cabinet, ed. 2, vol. 1, 



Abt. 12, Theil 1, pp. 293-294, pi. 49, fig. 12. 



1850. Helicoslyla tenera Albers, Die Heliceen, ed. 1, p. 104. 



1851. Helix tenera Reeve, Conchologia iconica, pi. 16, fig. 62c. 



1853. Helix tenera Pfeiffer, Monographia heliceorum viventium, vol. 3, p. 174. 

 1855. Helicostyla tenera H. and A. Adams, The genera of recent Mollusca, vol. 

 2, p. 102. 



