170 Transactiotis of the Royal Society of South Africa. 



Genotype Limicena nyasana (Smith), 1899. 



1899. Buliminus {Conulinus) nyasanus Smith, P.Z.S., p. 586, pi. 33, 

 figs. 41-42. D.F. 



Hah. L. Marques. Mtisherra R. Valley (Cressy). 



Conch ological grounds alone amply justify the creation of a new genus for 

 this remarkable species, which was described from Nyasaland and also occurs 

 in the Palm Kloof, Victoria Falls. 



The clear strong spiral sculpture of the protoconch, changing abruptly 

 into transverse striation on the later whorls, is only comparable, among the 

 larger African forms, with that of Krapfiella Preston, but Krapfiella has a 

 broad apex and an elongate shell, while Limicena has a narrow apex and a 

 bulimoid shell, so that I hardly think they belong to the same subfamily, 

 and place the new genus provisionally in the Achatininae. Newly hatched 

 specimens, which crawl aboiit together in large niimbers, are easily mistak- 

 able at first glance for a small form of Tropidophora, and only the present 

 writer's field acquaintance with them has prevented others from describing 

 them as a new species of that genus. 



Neuville and Anthony have recorded nyasana from Abyssinia. 



Subfamily STENOGYRINAE. 



Genus Pseudoglessula 0. Boettger, 1892. 



Subgenus pseudocerastus Germain, 1918. 



Pseudoglessula {Pseudocerastus) kirki (Dohrn), 1865. 



1865. Buliminus kirkii Dhrn., P.Z.S., p. 232. D. 



1889. Bulimus bridouxi Bgt., Moll. Afr. equat., p. 53, pi. 2, figs. 



4-5. D.F. 



Hab. Mozambique. Near Cabaceira (type, Kirk). 



L. Marques. Amatongas Forest (Arnold) ; Mtisherra R. Valley 



(Cressy). 



Dr. Germain has pronounced some of the Mtisherra River series to be 

 identical with bridouxi ; they are also identical with the type specimen of 

 kirki, so the synonymy seems firmly established ; Bourguignat's species 

 was described from Usagara. 



Ps. kirki agrees in sculpture, colour, and texture with boivini Morel., 

 but it is a rather more obese form, with a tendency to expansion of the 

 peristome in adult shells, a feature which I have not yet observed in 

 boivini. 



