smith: NON-MAKINE MOLLUSCA of ST. VINCENT. 311 



Hah. — In the mountains, scarcely ever belovi^ 2,000 ft. (Guilding). 

 "Moderately common on leaves in forest, 500-2,500 ft. In dry 

 weather conceals itself at roots of trees. The paler specimens are 

 from above 2,000 feet. Occurs only in damp forest, generally 

 ravines " (H. H. S. and Geo. W. Smith). 



31. Helicina kttgosa, Pfeiffer. 



Melicina rugosa, Pfr. — Mon. Pneumon., vol. i, p. 341 ; Conch. -Cab., 



ed. 2, p. 13, pi. iv, figs. 28-30; Sowerby, Thes. Conch., 



vol. i, p. 14, pi. iii, fig. 132, vol. iii, p. 281, pi. cclxviii, 



figs. 83, 84 ; Sowerby in Eeeve's Conch, Icon , vol. xix, 



pi. xiv, figs. 120«, h. 



Hah. — Cuba, Hayti (Pfr). "Leeward, dry forest above Chateau- 



belair, 1,000 feet, in rubbish, crevices of rocks. Many dead, but only 



a few live ones were found. Not observed elsewhere " (H. H. S.). 



This species has not previously been recorded from St. Vincent. 

 H. vinosa, Shuttleworth, from Porto Rico, and H. ignicoma, Guppy, 

 from Trinidad, are scarcely separable from this species. The promi- 

 nence on the basal margin of the peristome is more pronounced in 

 some specimens than others. 



32. Ancylus irroeatus, Gailding. 



Ancglus irroratus, Guilding. — Zool. Journ., vol. iii, p. 535, tab. 



suppl. xxvi, figs. 1-6 ; Sowerby in Reeve's Conch. Icon., 



vol. XX, fig. 20. 

 Hah. — Abundant on dead leaves in ditches, St. Yincent (Gld.) ; 

 "on aquatic plants, warm stagnant water at Brighton, south end of 

 island" (H. H. S.). 



33. Ancylus radiatus, Guilding. 



Ancghcs radiatus, Gld. — Zool. Journ., vol. iii, p. 536, tab. suppl. 

 xxvi, figs, 7-9 ; Sowerby in Reeve's Conch. Icon., vol. 

 XX, fig. 26. 

 Hal. — Same as A. irroratus (Guilding). 



Tlie form of this species is the same as that of A. irroratus, but the 

 radiating sculpture is more distinct. 



34. Physa rivalis (Maton and Rackett). 



Bulla rivalis, M. & R. — Trans. Linn. Soc. 1807, vol. viii, p. 126, 



pi. iv, fig. 2. 

 Limnea [Physa) rivalis. — Sowerby, Genera Shells, pi. clxxix, fig. 9. 



Hah. — Brazil, Cuba, Barbados, Trinidad, etc.: "in fossis Sti. 

 Vincentii copiosissime " (Guilding); "sluggish stream, near the sea, 

 Brighton, south end of island, on aquatic plants, also stagnant water, 

 windward side" (H. H. S.). 



Guilding described this species under the name of P. mannorata^; 

 and the P. ventricosa (Guilding MSS.), Sowerby,^ is founded upon 

 large adult specimens of this form. P. Sowerbgatta, D'Orbigny, and 

 P. acuminata, Gray, are also synonymous. 



' Zool. Journ., vol. iii, p. 534. 

 2 Couch. Icon., fig. 74. 



