22 LAND AND FRESHWATER 



subgenus, for they indicate only a distant relationship to the other 

 forms of Ciidopliorus of which the animal is known. I propose 

 the name Natalia, after the district Mr. Benson's type and 

 Mr, Ponsonby's shell came from. 



Natalia, nov. suhgcn. (Plato LXVIII. figs, l—ia.) 



Animal (from a single male specimen) with very short, undivided 

 foot (tigs. 1 & 1 c). Tlie male organ (figs. 1 a & 1 ^>) situated ou 

 the centre line of the neck, rather nearer to the anus than the eye- 

 tentacles ; operculum (figs. 2 & 2 a) large and expanded, externally 

 pi-esenting a broad spiral, slightly concave in front, with a thin 

 edge, and quite smooth internally. lladula like that of Cyclo- 

 phorns. Shell with a sharp thin peristome. 



It will be of interest to see over what area of Africa this sub- 

 generic form will extend, and how far the animals of the CyclojJioms 

 group of Madagascar approach it in their structure. 



Cyclopuorus (Natalia) wahlbergi, Benson. 



Cyclostoma ivaJdheir/i, Benson, Ann. & M. N. H. vol. x. p. 271 

 (1852); Pfr. Icon. n.'418, t. 50. figs. 17-19. 



Ct/clojiJwrus waJiIheiyi, Gray, Cat. Phaneropneuraona in B. M. 

 p. 56 (1852); Pfr. Pneum. Mon. p. 416 (1858). 



" This species is very similar to Cyclotus transhuidus (Colombia) 

 and G. latescens (Brazil).'* 



Peeve, Conch. Icon. pi. xvii. fig. 81 (not very good). 



Cj/cloji^ioras (?) convexuiscuhis, Pfr., Cape of (jood Hope, P. Z. S. 

 1855, p. 104, " Operc. corneum, iudistincte arctispirum." Var. 

 m!no); Bs., A. M. N. H. xviii. p. 438 (1856). 



Cyclophorns {Tlteohaldins) ivahlherr/i, Nevill, Hand-list, p. 277 

 (1878). " I doubt if this form will prove to be a Cydophorus at 

 all." 



In his 'Amended Hand-list' Nevill removes it from the subgenus 

 Tlieohaldias and places it with the African species — C. anyolensis, 

 l^ohrn (Jahrb. v. 1878, diam. 21, alt. 16 mm ), C. leonensis, 

 Morelet, and C. UUiputtanKS, Mori., 1873, — just before the 

 Andaman and Nicobar species. 



Original description : — " Testa mediocriter umhUlcaia, depresso- 

 tarhinata, scahre et acute radiato-striata, lidi'o-(/lauca, epidermide 

 fiisca ; spira vix elevata, acutiuscnla ; anfractihv.s 4, convexis, ultimo 

 rotundato ; apertura ampla, alta, rotimduta, pcristomate acuto ; 

 uiidnlico aperto, 2)rofimdo. 



" Diam. major 14, minor 11, axis 7 mill. 



" This is probably the species which Wahlberg got at Natal, and 

 which by some misconception was attributed to the fauna of South 

 Africa by Krauss, as C. franshimhun, a South American shell 

 possessed of a calcareous operculum, whereas that of the present 



