88 Mr. H. B. Preston on Jiew 



it is probable tliat tlie late IMr. Cuming parted witli It at a 

 later date, it may be considered as lost ; this figure lias all 

 the appearance of a young specimen of A. variegata, Lk., and 

 is certainly not the same species as that figured later by 

 Reeve in the ' Conchologia Iconica ' *. This latter, though 

 figured as A. tincta, and which is now in the British Mu- 

 seum, seems to be a varietal form of ^, loeynesi, Dautz.f. 

 Pfeiffer:):, misled by Reeve's later illustration, figured several 

 specimens of what he took to be A. tincta, but his figures, 

 though possibly belonging to the same species as that figured 

 by Reeve in the ' Conchologia Iconica,' certainly have nothing 

 to do with that figured in the first place by him in the 

 ' Conchologia Systematica,' There are two other shells in 

 the British Museum, one marked " A. tincta, var.," also from 

 the Cuming Collection, and bearing locality " Fernando Po," 

 and the other a poor specimen unnamed, but obviously 

 belonging to the same species, with locality " Upper Congo " ; 

 these agree very fairly with the specimen now figured and 

 described, and for which I propose the name of Achatina 

 Ihotelleriana. 



Achatina Ihotelleriana, sp. n. (Fig. 2.) 



Shell oblong-ovate, obtuse, covered with a smooth 

 yellowish-brown periostracum and painted with irregular 

 transverse chestnut bands and flame-markings ; upper whorls 

 tinged with rose ; whorls 7^, flattened but inflated, sculptured 

 with transverse lines of growth and very minute spiral striae 

 only visible with the aid of a lens, and showing minute 

 granulation in places ; sutures impressed, margined, slightly 

 crenulate; columella iDluish white, much twisted, descending 

 vertically, obliquely truncate below, and spreading above 

 into a parietal callus which reaches the upper margin of the 

 whorl about 1 mm. behind the extremity of the outer lip; 

 peristome thin, simple above, slightly reflexed below, tinged 

 with reddish brown ; aperture inversely auriform ; interior 

 of shell bluish, glossy. 



Alt. 72, diam. maj. 39 mm. 



Aperture: alt. 37, diam. 18 mm. 



Hab. S. Antonio, left bank of Congo Delta. 



Dreissensia hananaensis, sp. n. (Fig. 3.) 

 Shell slightly inequivalve, elongately subtrigonal, broad, 



* Reeve, Conch. Icon. v. pi. xi. fig. 29. 



t Ann. Soc. malac. Belgique, xxxiv. p. 27. 



X Pfeiffer, Malak. Bl. xvi. 1869, p. 253, pi. i. figs. 1-4. 



