the CaribcEiin Islands. 169 



A subgenus nearly allied to Bulimus, from which it differs in the 

 gradually dechning whorls of the spire, and the more contracted aperture. 

 It is distinguished from Clausilia and Pupa by the simple and regular 

 mouth destitute of teeth and laminae. 



This animal was sent me by a friend who has taken great pains to put 

 me in possession of the Mollusca of the Virgin Islands, that I may ex- 

 amine them for publication. I find that the terrestrial testaceous Mollusca 

 will travel to a very great distance in a living state, even in the tropics, 

 if packed in saw-dust. I have also lately dispatched tin boxes perforated 

 on all sides, and filled with wet moss and mud, in which I hope soon to 

 obtain alive the aquatic Mollusca which swarm in the waters of the mighty 

 Oronoko, and the canals and ponds of the neighbouring colonies. 



Genus. Bulimulus, Leach. Bulimus, Auctorum. 

 Char. gen. 



Animal heliciforme. Tentacula quatuor, duobus superioribus capita- 

 tis, oculatis : fades lobata. Os subtus. Pallium foramine communi 

 perforatum. 



Testa vix umbilicata, oblonga, turrita, anfractus ultimus maximus : 

 apertura elongata, integra ; columella vix cavernoso-inflexa : labrum 

 tenue, saepiiis gradatim subreflexum in adultis, at nunquam marginatum. 



* Labro subreflexo. 



1. Bulimulus undulaius. ' iMn, 



B. olivaceo-niger, tentaculis apice pallidis, pede subtias livido. 



Var. jG. pallidior, sordid^ flavido-olivaceus. 



Testa longitudinaliter plicata, anfractibus septem ; tota flavida, livido- 

 brunneo undulata ; labris saepe croceis. 



Var. /3. nitore coeruleo admixto. 



Habitat frequens in arboribus Sti. Vincentii, ad radices montis " Bon 

 " Homme." 



Testa nuper ab ovo exclusa fuscescens, ferrugineo maculata, longitu- 

 dinaliter et transverse dense striata. 



A very beautiful, but local species, apparently confined to the old 

 forests which close round the foot of the Bon Homme. The remarkably 

 delicate sculpture of the young shell (which is not continued in the ad- 

 ditions made after the birth of the animal), is worthy of observation. 



Vol. IV. M 



