206 PSEUDACHATINA. 



lien Cabinet, 1893, and a masterly account of the Cameroon 

 species by d'Ailly, in 1896. 



1. P. WRIGHTI (Sowerby). PI. 1, figs. 1, 2, 3, 4, 5. 



Ovate or ovate-oblong, solid, finely, lightly striate, nearly 

 smooth; in large part denuded of the thin, yellowish, lamel- 

 lose cuticle, which adheres on part of the last whorl only. 

 Variously colored: (1) White, with rich chestnut stripes, 

 widening downwards, and usually coalescent below the per- 

 iphery, or (2) dark chestnut below the periphery, having a 

 reddish belt about the middle, and whitish above that, some- 

 times with a series of brown subsutural spots. Apical whorls 

 either pale or violet. Whorls 7%, parted by a margined, 

 finely crenate suture. Aperture oblique, ovate, the lip broadly 

 reflexed, white or tinted. Columella subvertical or arcuate. 



Length 67, diam. 34, length of apert. 33 mm. 



Length 67, diam. 30, length of apert. 30 mm. 



Length 83, diam. 38, length of apert. 40 mm. 



West Africa: Old Calabar. 



Bulinus wrighti SOWB., Description of a new Bulinus, 

 1853, with fig. Pseudachatina wrighti PFR., Mon. iv, 596; 

 Novit. Conch., pi. 113, f. 1-4. SHUTTLEW., Notiti^ I, p. 90, 

 pi. 9, f . 1, 2. KOBELT, Conchyl. Cab., p. 9, pi. 4, f . 1-4 ; and 

 var. buchneri Kob., p. 11, pi. 4, f. 5, 6. 



Distinct from the multiform P. doiunesi by its regular 

 form and smooth, even surface. The color-pattern, shape and 

 size vary widely. I have not been able to consult the orig- 

 inal description, and therefore do not know which color- 

 pattern is the typical. The habitat is north of other known 

 species. 



la. Var. BUCHNERI Kobelt. PI. 4, figs. 16, 17. 



Conic- turrite, the last two whorls with spiral furrows; 

 basal color unusually distinct in the mouth and reaching out 

 on the lip. Aperture less than half as long as the shell. 

 Length 66, diam. 53, alt. of aperture 28 mm. Type in the 

 Senckenberg Museum. 



