PSE0DOOLESSULA, 163 



Congo Valley: Forest of Waregga (zone of Manyema). 



Pseudoglessula ? ph<za PUTZ., Bull, des Seances, Soc. Roy. 

 Malac. Belgique, 1898, p. Ixxxv, f. 22. 



A large, stout species, with the columellar truncation some- 

 what obsolete. 



8. P. HUMICOLA Dupuis et Putzeys. PI. 57, figs. 35, 36. 



Shell elongate-turriculate, perforate, rather solid, translu- 

 cent; yellow or purple-chestnut, covered with a densely and 

 very minutely granulate brown cuticle, the last whorl more 

 glossy and darker, generally pale at the suture. Spire elon- 

 gate, conic, the apex obtuse. Whorls 7 to 8, a little convex, 

 separated by a rather deep suture, closely rib-striate, the rib- 

 lets more distant on the first two whorls, in the rest regularly 

 decreasing, becoming similar to growth-striae on the last whorl,, 

 which is minutely but distinctly subangulate. Lip arcuate, 

 slightly reflexed. Aperture moderately thickened within, 

 violaceous, acute behind ; columella subvertical, usually lightly 

 retreating in front, reflexed at the perforation, violaceous, 

 obliquely folded with a white fold below the middle; peris- 

 tome brown with reflexed edge. Length 32, diam. 15, length 

 of aperture 14, width 8 mm. (D. et P.). 



Congo: Nsendwe (P. Dupuis). 



Pseudoglessula humicola DUP. et PUTZ., Bull, des Seances 

 Soc. Roy. Malac. Belg. 1901, p. xxxv, f. 3, 4 (shell), 5, 6; 

 (living animal). 



The characteristic sculpture of the embryonic whorls has 

 caused us to place this species in the genus Pseudoglessula. 

 It approaches Bulimus (Cerastus) ptychaxis Sm., but differs 

 in color, the smaller number of whorls and the larger size. 



The foot is very flat, bifid behind (pi. 62, fig. 26). The 

 foot is distinctly bordered, the border vertically striate. It 

 is rose-gray, deeper on the tentacles, the mantle (within the 

 shell) vermiculate with white spots visible through, by trans- 

 parence. It lays 10 white, subspherical eggs. Lives on the 

 ground, generally under prostrate tree- trunks (Dupuis). 



The eggs differ from those of the typical species of the 

 genus. It probably belongs elsewhere. 



