122 rROCEEDINGS OF THK MALACOLOGICAL SOCIETY. 



This list may not be complete, nor is it critical, but is an 

 association of the species grouped together as or under the generic 

 name 3Iartensia. 



The species tumidula, Martens, does not seem congeneric, whilst 

 others, such as nyiroensis, Preston, and shimhiense, Preston, need 

 further consideration. Another correction may be here noted. 

 Connolly, in his invaluable Reference List of South African Non- 

 marine MoUusca (Annals South African Museum, vol. xi, 1912), 

 introduced a new sub-family Trochonaninge, which, is represented in 

 his list by the genera Martensia, Troehomorpha, Trochozonites, and 

 ThopsieUa. I do not consider that these African molluscs have 

 any close relationship Avith Trochoimnina, the type of which is 

 schmeltziana, Mousson, a Pacific Ocean shell (cf. Glide, Proc. Malac. 

 Soc, vol. X, p. 389, 1913). I would suggest that the sub-family 

 name be altered to Teochozonitin^, the basis of which is the genus 

 Trochozonites, proposed for an African shell, and the species of which 

 closely resemble in conchological features the species of Ledoidxia. 



Trocliomorpha, used by Connolly (p. 103), following Melvill and 

 Ponsonby, can have no place in the African list, the type being also 

 a Pacific Ocean shell. 



ThapsieUa, at my suggestion, was altered to GudeeUa by Preston, 

 but acknowledgment was accidentally omitted ; this genus does not 

 seem to fall into my sub-family Trochozonitinse, and I would suggest 

 to Connolly reconsideration of this association. 



