the Caribcean Islands, 529 



prominuli. Os subtus, longitudinale, laMis plicatis. Pallium 

 margine toto ad respirationem libero. Operculum corneum, sub- 

 triangulare, annulare, nucleo subcentrali ; in dorso pedis affixum. 

 Testa spiralis, globoso-depressa, apertura semirotundata ; 

 anfractibus basilaribus subito majoribus, ultimo nonnunquam sub- 

 carinato. Peristoma saepius refiexum. Columella basi callosa, 

 umbiliculum senioris claudens. 



1. Helidna Occidentalis. 



Ilel. corpora nunc pallide livido, nunc fuscescente ; dorso 

 pedis, cervicis lateribus, tentaculisque atris ; capite cerviceque 

 fuscis ; pede subtus flavescente. 



Testa flavida, superne rufo nebulosa, subtus unifasciata ; colu- 

 mella lactea, labro candido ; anfractibus sex ; operculo brunneo, 

 margine pallido. 



Habitat in montibus sylvosis Sti. Vincentii, frondibus repens ; 

 gigas in hoc genere. 



Var. ^. testa superne trifasciata, fascia media majori. 



Var. y. superne rufo varia, margine immaculato. 



The species found in the mountains of St. Vincent scarcely 

 ever descend below 2000 feet above the level of the ocean ; 

 while those of Barbadoes are found in any situation however 

 exposed and dry. There are three or four more new species in 

 my cabinet, which shall soon be figured. The shell before us 

 was first described for the 14th vol. of the Linnean Transactions 

 under its present name, which was changed by those who super- 

 intended the publication of the volume, under the idea that it 

 was synonymous with H.fasciata^ from which it differs widely. 



Tab. XV. Fig. 6. PuUus, labro tenero, umbiliculo aperto. — 

 7. Animal retractum. — 8. Idem repens mag. nat. — 9. Testa.— 

 10. Operculum. 



2. Helidna variabilis, 



H. flavicans ; dorso, cervicis lateribus, frontisque fasci^ nigris ; 

 oculis atris. 



2 L 



