HELIX. 267 



from a continuous series ; but they serve admirably to illustrate one 

 of the most remakable instances of the specific variability of mollusks, 

 known to science. 



? TROCHOMORPHA, (p. 72). 



H. SWETTENHAMI, H. THIEROTI, H. HARDOUINI, H. LAHATENSIS, 



De Morgan. (Unfigured). Perak* 



H. PLANOCONUS, Mousson. (Unfigured). Viti Is. 



H. THEMIS, H. KANTAVUENSIS, Garrett. (Unfigured). Viti Is. 



H. CORALLINA, Mousson, (p. 93). 



Mr. Garrett considers this a distinct species from H. Ludersi, Pfiv 



VIDENA, (p. 82). 



H. SPLENDENS, Semper, (p. 86). Philippine Is- 



Figured in Journ. de Conch. 94. 1887. 



H. SIBUYANICA, Hidalgo. Philippine Is. 



H. LOOCENSIS, Hidalgo. Philippine Js- 



H. ACUTIMARGO, Pfr. (p. 85). Philippine Is. 



Hidalgo makes H. radula and H. alboeincta, Pfr. and H. curvilas- 

 brum, Ads. and Reeve synonyms of this species. 



PCECILOZONITES, (p. 95). 



For this group Mr. Ancey has recently proposed a new name,. 

 BERMUDIA, the type being H. Bermudensis, Pfr. 



PELLA, (p. 104). 



Mr. C. F. Ancey has established a new group LEJEANIA, for 

 such species as H. Darnaudi, Pfr. H. Isseliana, H. Jickeli, Nevill, 

 H. Lejeaniana, Bourg. etc. (p. 104), inhabiting the Mountains of 

 Abyssinia and Sennaar. 



SHELDONIA, Ancey. 1887. 



Has been proposed for a South African group including H. 

 Trotteriana, H. Natalensis, H. cotyledonis. 



TRIGONOSTOMA, (p. 117). 



H. BICONCAVA, Heude. 



On account of the previously published H. biconcava, Pfr. 

 (Manual, I, 130), Crosse has changed this name to H. Outangensis; 

 but as Pfeiffer's species is an Elsea and not a Helix, Heude's name 

 can be retained. 



