HELICIJXE. 45 



233. Nanina bifilaris, Semper. 



(Euplecta sp., fide Semper.) 

 3 Arayat ; coll. Prof. C. Semper. 



Sub-Genus TROCSONANINA, Mss. (type N. mozambicemis.) 

 [= MARTEN SIA, Semper, type N. mozambicensis.] 



234. Nanina (Trochonanina) jenynsi, Pfeiffer. 



2 Zanzibar ; ex c. Dr. Ed. von Martens. 



Sub-Genus THAPSIA, Albers. (type N. troglodytes'). 



235. Nanina (Thapsia) troglodytes, Morelet. 



1 Coast of Guinea ; ex c. A. Morelet, Esq. 



Sub-Genus ACUSTA, Albers. (type 2V. ravida). 

 Acusta is ranked of late as a Sub- Genus of Helix and not 

 of Nanina, but I am unable to find any distinct statement that 

 the animal is without a mucous pore. 



236. Nanina (Acusta) ravida, Benson. 



3 China; ex c. G. Nevill, Esq. 



237. Nanina (Acusta ?) nora, H. A. Adams. 



2 Ichang Gorge, China ; ex c. H. A. Adams, Esq. 



238. Nanina (Acusta) brevispira, H. A. Adams. 



1 Ichang Gorge ; ex c, H. A. Adams, Esq. 



239. Nanina (Acusta) assimilis, H. A. Adams. 



1 Formosa ; ex c. H. A. Adams. 



Sub-Genus CALDWJSLLIA, H. A. Adams (type N. phily- 

 rind). 



240. Nanina (Caldwellia) imperfecta, Deshayes. 



6 Mauritius ; coll. G. Nevill, Esq. 



4 Bourbon ; coll. G. Nevill, Esq. 



241. Nanina (Caldwellia) cernica, H. A. Adams. 



20 Vacoa, Mauritius (type) ; coll. G. Nevill, Esq. 



