Manchester Memoirs, Vol. li. (1907), No. 4. 9 



Var excellens nov. (Fig. 7 of Plate). 



Hab. Petauke, 25 miles E. of Loangwa River, at 

 2,400 feet. 



Several examples, mostly with the animal, all agree- 

 ing in deviation from the type by greater planulation or 

 flattening of the upper portions of the whorls. The 

 nearest approach to this species seems to be H. caillaudi 

 Morelet*, a form likewise planulate, but not quite to the 

 same extent. 



Martensia mossambicensis (Pfeiffer). 



Helix mossambicensis Pfeiffer, Proc. Zool. Soc. Lond., 1855, p. 91, 

 pi. 31, fig. 9; "Mon. Helic," vol. 4, pi. 32. 



JVanina (Trochomoi-pha) Mossambicensis (Pfr.), v. Martens, Mai. 

 Bldtt., vol. 6, p. 2ii, &c, 1859. 



Martensia mossambicensis Semper, " Reis. Archip. Philippin.," 

 part 2, vol. 3, p. 42, pi. 3, fig. 5 ; H. Godwin-Austen, Proc. 

 Mai. Soc. Lond., vol. r, p. 281, pi. 19, figs. 1 — le 

 (anatomy), 1895. 



Trochonanina mozambicensis Mousson, Jonrn. de Conch., vol. 17, 

 p. 330, 1869 ; Bourguignat, " Moll. Afrique equat.," p. 17 ; 

 E. A. Smith, Proc. Mai. Soc. Lond., vol. 1, p. 164, 1894. 



Hab. Petauke. February 19, 1905, and near Loangwa 

 River, June 12, 1905. 



A fine variety of this widely distributed and common 

 species, conspicuous for its very fine microscopical spiral 

 concentric striae, omnipresent over the whole surface, espe- 

 cially conspicuous towards the base. Most varieties of 

 M. mossambicensis are smooth basally. Of the several 

 varietal names imposed, Mr. INeave's specimens most 

 assimilate M. nseudzveensis Dup. and Putz. 



*C.f. von Martens "Ost Afrika," pp. 37, 38, pi. I, f. 4, and pi. 3, f. 2. 



