206 Transactions of the Royal Society of South Africa. 



Pomatias elegans the females are on an average decidedly larger than the 

 males. It is probable therefore that the Maceqiiece Tropidophora agrees 

 with the European species in this character, as it undoubtedly does in the 

 more important features of its anatomy. 



The animals of Tropidophora {Ligatella) insularis (Pfr.), from various 

 localities in Natal, are of a paler colour than those of the form just described, 

 the head and adjacent parts being less darkly pigmented, the tentacles not 

 such a deep yellow, and the pulmonary veins edged with light grey instead 

 of black. Moreover, the anterior edge of the kidney seems to curve forwards 

 a little more above the heart in these specimens of T. insularis from Natal ; 

 the radula is relatively slightly smaller, and was not bent forwards in the 

 animals dissected ; and the denticles on the middle division of the marginal 

 teeth are rather broader and less numerous, their average number being 

 about eleven or twelve. 



Tropidophora [Ligatella) kraussiana (Pfr.), 1852. 



1854. Cyclostoma kraussianuni Pfr., Conch. Cab., p. 334, pi. 43, figs. 

 17-18. D.F. 



Hab. L. Marques. Inhambane (Gibbons). 

 A record of very doubtful authenticity. 



Tropidophora {Ligatella) letourneuxi (Ancey), 1887. 



1887. Rochebrunia letourneuxi Ancey, Bgt., Bull. Soc. Mai. Fr, iv, 

 p. 270. D. 



Hab. Mozambique coast (Stuhlmann). 



Tropidophora {lAgatella) ligata (Miiller), 1774. 



1786. Turbo ligatus Miill., Chem., Conch. Cab. ix, 2, p. 60, pi. 123, figs. 

 1071-1072; 3-4. D.F. 



Hab. Mozambique coast (Stuhlmann). 



L. Marques. Tette (Peters) ; Rikatla (Junod) ; Delagoa Bay (Bar- 

 nard) ; Wanetsi R., Magude District (Bell Marley) ; Zangwe Basin (Cressy). 



Tropidophora {Ligatella) nyasana (Smith), 1899. 



1899. Pomatias nyasanus Smith, P.Z.S., p. 591, pi. 35, fig. 5. D.F. 

 Hab. Mozambique. Frontier 7 miles south of Mt. Dedza, Nyasaland 

 (Mrs. Connolly). 



