146 OPEAS, EAST AFRICA. 



Opeas ivelwitschi NOBRE, Mollucos etc., p. 10, pi. 1, f. 19, 

 20, in Annaes de Sci. Nat. ix, 1905. 



Three examples from Luinha are of a greenish color. In 

 some examples there is a very narrow band at the suture. 



III. East African Species. 



15. OPEAS BAWRIENSE n. n. PL 15, fig. 66. 



Shell slender, diaphanous, nearly smooth, glossy. Whorls 

 7, rather flattened, gradually increasing, the last larger and 

 more swollen. Apex rather obtuse. Aperture ovate-ellipti- 

 cal, lip arcuate; columella a little reflexed. Length 5.5, 

 diam. 2 mm. (Gibbons). 



Bawri Island, Zanzibar (Gibbons). 



Stenogyra lucida GIBBONS, Journal of Conchology ii, p. 

 144, pi. 1, fig. 4, May, 1879. Not Achatina lucida Poey, 1851, 

 also an Opeas. 



"Allied to 8. delicata [Curvella delicata], but perfectly 

 distinct, being much smaller with the whorls flatter and nearly 

 smooth, and the aperture less elongated." 



16. 0. CRENULATUM E. A. Smith. PI. 15, fig. 67. 



Shell slender, subulate, pellucid, glossy, thin, whorls 12, 

 slowly increasing, the two apical smooth, convex, the rest a 

 little convex, obliquely lightly striatulate, at the suture min- 

 utely crenulate; separated by a slightly oblique suture, the 

 last whorl short. Aperture inversely ear-shaped, small; 

 peristome thin, the 'columellar margin expanded and reflexed. 

 Length 12, diam. 3, aperture 2*4 mm. long. (Smith). 



British East Africa, near the terminus of the Uganda R. R. 

 between Sept. 1900 and April, 1901 (Wm. Doherty). 



Opeas crcnulata SMITH, Journ. of Malacology viii, p. 96, 

 fig. 6 (Dec. 30, 1901). 



"Well characterized by the numerous short whorls and the 

 minute plication at the suture. The form is somewhat vari- 

 able, some specimens being more slender than others." 



17. 0. VENUSTUM E. A. Smith. PI. 15, figs. 69. 



Shell long, slender, pellucid, glossy, slightly striate. 



