146 HOMORUS, WEST AFRICA. 



West African Species. 



21. H. OLEATUS (Martens). PL 57, figs. 32, 33. 



Shell conic-turrite, thin, vertically striatulate, with an oily 

 luster, yellowish. Apex rather obtuse ; whorls 8, the first and 

 second globose, smooth, the following whorls regularly in- 

 creasing, somewhat convex, the suture simple ; last whorl ovate. 

 Aperture one-third the total length, subvertical, obliquely 

 pirif orm-elliptical ; peristome thin, the columellar margin very 

 arcuate, transversely truncate at the base; parietal callous 

 very thin. Length 22. diam. 8, length of aperture 7.5, width 

 4.5 mm. (Marts.). 



West Africa: Bonjongo, Camroons. (Buchholz). 



Stenogyra oleata MARTS., Monatsbr. K. P. Akad. Wissen- 

 sehaften zu Berlin, 1876, p. 261, pi. 3, f. 9-11. Homorus 

 oleatus KOBELT, Conch. Cab. p. 106. 



Nearest to suaveolens Jick. among known African forms, 

 but the spire is more slender, the aperture narrower. Of the 

 total length of the shell, one-third is measured to the insertion 

 of the outer lip ; the penult, and next earlier whorls comprise 

 another third, while the rest of the volutions complete the 

 last third. (Marts.) 



22. H. FOXCROFTI (Pfeiffer). 



Shell cylindric-turrite, rather solid, irregularly striatulate ; 

 whitish under a deciduous corneous cuticle. Spire turrited 

 above, the apex obtuse, then cylindric; suture subcrenulate. 

 Whorls 121/2, a little convex, the last scarcely one-fifth the 

 total length, rounded basally ; columella arching forward, dis- 

 tinctly and narrowly truncate. Aperture oblique, oval; 

 peristome simple and unexpanded. Length 35, diam. 6.5 mm. ; 

 aperture 6.5 mm. long, 3.66 wide (Pfr.) . 



West Africa: Sierra Leone (Cuming coll.). 



Achatina foxcrofti PFR., P. Z. S. 1861, p. 25 ; Malak. Bl. 

 1861, p. 78; Monogr. vi, p. 231. 



Unfigured; and known only by the above description. 

 Probably belongs near involuta. 



