1883.] MOLLVSCA OF DOMINICA, 597 



abundant everywhere in the neighbourhood of Roseau, down to the 

 sea-level. It is terrestrial, and frequents gardens and plantations. 

 There is a variety of a greenish colour with a decided double brown 

 band, but the normal colour of the shell is dark brown throughout. 

 The specimens 1 collected vary much in size. The young shells are 

 umbilicated. 



((^ Helix (Dentellaria) nigrescens, Wood. 



Remarkable for its globular form and strongly marked dentition. 

 It is common on the Lake-mountain road, and in various localities 

 above 1000 feet. 



Helix (Dentellaria) josephina, Fer. 



This handsomely marked species is common in places above 1500 

 feet. I met with it in company with H. nigrescens. It occurs also 

 in Martinique and Guadaloupe. 



Vaginula occidentalis, Guilding. 



A slug-like creature, without a shell, belonging to the family 

 Veronieellidie. 



I found nine specimens under dead bark in damp places, not far 

 from the sea. 



Operculata. 



i-i Cyclophorus amethystinus, Guppy. 



' Mr. Guppy, of Trinidad, has described this species in the ' Annals 

 of Natural History' for 1868, but he erroneously calls it a Vydotus, 

 which it is not, it having a horny operculum, and not a shelly one 

 as in Cyclotus. Above 1200 feet, moderately common. 



Helicina (Pachystoma) rhodostoma, Gray, 



This beautiful Helicina is found sparingly on the track from 

 Roseau to Rosalie on the windward side of the island, at an altitude 

 of about 1500 feet. It is arboreal in its habits. It may be at once 

 distinguished from all other species by the vertical spine at the base of 

 the columella. The peristome is sometimes black, sometimes yellow 

 or white, and occasionally of a deep rose-colour. 



Helicina (Pachystoma) fasciata, Lam., = ff. convexa, Pfr. 



At an altitude of several hundred feet. Also found at St. Vincent 

 and Barbadoes ; the Barbadoes specimens are much more brightly 

 coloured and painted. The examples I collected in Dominica vary 

 somewhat in size. 



Helicina (Idesa) velutina, Guppy. 



A small brown species, abundant on all the lower slopes, adhering 

 to rocks and stones. 



