430 Mr. R. J. L. Guppy on the Terrestrial 



parts of the island afford a congenial habitat to the land-snails. 

 An ascent of Mount Kuliabon, 3000 feet high, furnished me 

 with examples of the four Helices already mentioned, Hyalina 

 Baudoni^ AmphihuUma pardalina, Cyclotus amethystinus^ and 

 Olandina perlucens. On Morne Diablotin, at the north end 

 of the island, I found Hyalina Baudoni, the four Helices 

 Helicina rhodostoma^ H. conuloides^ H. plicatula^ H. velutina^ 

 AmphihuUma pardalina^ Cyclotus amethystinus, and Glandina 

 perlucens. On the very summit of this mountain, stated to be 

 5314 feet high, I collected Helix hadia^ H. Josephince, and 

 Helicina comdoides. AmphihuUma pardalina is another spe- 

 cies fond of the thickly wooded heights ; but several of the 

 Mollusca (e.g. Helicina rhodostoma and Cyclotus amethystinus) 

 appeared to cease at about 3300 feet. 



The general aspect of the molluscan fauna of Dominica is 

 precisely what we might have expected from its position be- 

 tween the islands of Guadelupe and Martinique, the land- 

 shells of which are well known. Of the total of twenty spe- 

 cies determined by me, eleven are found in the neighbouring 

 islands, whilst I have considered nine to be undescribed. 



1. Glandina perlucens, n. sp. 



Testa subulate -turrita, laevis, diaphana, fusco-flavida, vix striatula, 

 lineis distautibus ornata ; apex obtusissimus ; anfractus 7, parum 

 convexi, lente accrescentes, ultimas applanatus, spirse longitudi- 

 nem circiter sequans ; sutura valde impressa ; columella valde torta, 

 truncata ; peristoma simplex, margine externo aliquanto pro- 

 minente. 



Long, 16 miUim., lat. maj. 4 millim. ; apart, alt. 4, lat. 2. 



A sulmlate-turrite, smooth, brilliantly polished, yellowish- 

 red shell, marked by obscure striae and by distant variciform 

 lines, of which there are from three to six on a whorl ; with 

 a very obtuse apex and seven slowly increasing, scarcely con- 

 vex whorls, the last somewhat flattened and equal to about 

 half the length of the shell ; columella strongly curved, trun- 

 cate ; aperture oval, elongate ; peristome simple, its external 

 margin somewhat prominent. 



A species allied to G. afrcuata., Pf., of Jamaica. Of three 

 examples I obtained, one only was of full growth. 



2. Stenogyra octona^ Chemn. 



3. Hyalina Baudoni, Petit. 



I was rather in doubt whether to refer the Dominican shell 

 to this species or to H. concolor, Fdr. It appears to be rather 

 intermediate between those two very closely allied forms. Its 

 whorls are more like those of H. roncolor in contour, except in 



