Manchester Memoirs, Vol. li. (1907), No. 4. 13 



Achatina rhodesiaca sp. n. (Figs. 4, 5, 6, 9 of Plate). 



A testa elongato-fusiformi, spira attenuata, tenui, 

 nitida, albo-cinerea, fiammis fulgetrinis obliquis castaneo- 

 brunneis, vel fere rectis, nunc latis, nunc angustis, longitudi- 

 naliter decorata, interdum brunneo-suffusa, anfractibus 

 ad 10, tribus apicalibus inclusis nitidis, albis, laevissimis, 

 caeteris infra suturas corrugato-impressis, undique tenuiter 

 cancellato-striatis vel decussatis, ultimo anfractu paullum 

 producto, cseteros magnitudine multum exsuperante, 

 superne leniter decussato, infra laevi, apertura ovata, intus 

 caerulescente, peristomate tenui, paullum effuso, colum- 

 ella fere recta, apud basin truncata. 



Alt. 58. Diam. maj. 31. Aperturae alt. 28. Diam. 

 15 mm. sp. max. 



Hab. Kapopo, Rhodesia. 



Over a dozen examples, in various stages of growth. 

 This is a moderately sized, very attenuately fusiform 

 Achatina, varying mainly in disposition of longitudinal 

 chestnut brown zigzag, or nearly straight, flame markings, 

 so characteristic a sign of African Limicolarice or 

 AchatincE. 



Two varieties occur : — 



(a) Leucopasa. Shell entirely colourless, white. (Fig. 9). 



(b) Lanceolata. Shell much narrowed in the body 

 whorl, being laterally nearly straight. Mouth smaller and 

 narrower, peristome not in the least suffuse. (Fig. 5). 



A certain affinity to A. johnstoni E. A. Sm. from 

 Nyasaland is observable : but the coloration is different, 

 the shell of this latter species being more convex, and 

 more roughly granulate with incremental lines and spiral 

 striation. It is likewise of greater size. And another 

 species A. capelloi Furtado, a West African shell, of 

 which we have seen only a figure, collected by Capello 

 and Ivens near Ouintum, seems allied to A. rhodesiaca. 



