156 PSEUDOGLESSULA. 



12, densely decussated with, delicate oblique growth-lines 

 and numerous spiral striae. Length 34.5, diam. 7, length of 

 aperture 6, width 3.5 mm. (D. et P.) 



Congo: Nsendwe (P. Depuis). 



C. manyemaense D. et P., t. c., p. xxxviii, f . 11, 12, 13 ; with 

 var. cingulata, p. xxxix. 



Distinguished from C. dautzenbergi by the less glossy shell, 

 the spire forming a less acute cone, and especially by its more 

 emphatic sculpture. 



Var. cingulatum D. et P. It is distinguished by a double 

 brownish narrow band parallel to the suture on the upper 

 part of the whorls of the spire. It inhabits the same local- 

 ity as the type (D. et P.). 



Genus PSEUDOGLESSULA Boettger, 1892. 



Pseudoglessula BTTG., Nachrichtsblatt der deutschen Mala- 

 kozoologischen Gesellschaft, xxiv, p. 202, Dec. 1892, for 

 A. calabarica Pfr. and its allies. d'AiLLY, Contributions a 

 la connaissance des Mollusques terrestres et d'eau douce de 

 Kameroun, in Bihang till K. Svenska Vet.-Akad. Handlingar, 

 xxii, pt. iv, no. 2, p. 100 (1896). 



Shell imperforate, ovate or oblong-turrited, rather thin, 

 ribbed or rib-striate, covered with a thin brownish or green- 

 ish cuticle which is often partially worn off the apertural 

 side. Apex obtuse, rounded, the tip more or less turned in^ 

 two embryonic whorls vertically ribbed or reticulate. Last 

 whorl with a thread-like or subobsolete peripheral keel, 

 smoother below it. Columella concave, truncate at the base; 

 outer lip thin, simple or perceptibly expanded. 



Teeth (pi. 62, fig. 18, P. leroyi, after v. Marts.) with the 

 centrals narrow, unicuspid; inner lateral tooth bicuspid. 



The anatomy is otherwise unknown. P. calabarica is ovo- 

 viviparous, most of the other species are oviparous; the eggs 

 are markedly oblong, very pale yellow, or white, and lie 

 obliquely in the oviduct. 



Type P. calabarica (Pfr.). Distribution, tropical Africa. 



The aperture, especially in the East African forms, is re- 

 markably like that of Glessula. In a few species from the 



