SMITH : NON-MARINE MOLLTJSCA OF GRENADA. 



319 



anfractus 4^ mediocriter convexi, regulariter _ accrescentes, lineis 

 incrementi tenuissimis sculpti, ultimus in medio acute rotundatus, 

 haud angulatus, subtus in medio impressus ; apertura parva, subobliqua, 

 intus rufescens ; peristoma rufescens, le\ater incrassatum et reflexum, 

 margiue basali in medio prominulo ; callus basalis^ plus minus 

 rufescens, minute gi'anulatus. Diam. maj. 3-75, min. 3-3 mm. ; 

 alt. 2"5 mm. 



Jjah. — "Pretty common below 1,000 feet; shady damp places, 

 especially cocoa orchards, under rotting leaves " (H. H. S.). 



Specimens of this pretty little species are generally a trifle smaller 

 than those of JI. rugosa, P'fr., from St. Yincent. The species are very 

 much alike as regards form, but the great difference of _ sculpture 

 readily distinguishes them. The operculum is wanting in all the 

 specimens collected, and cannot therefore be described. 



H. minutissima, Newcomb MS., quoted by Bland (Amer. Journ. 

 Conch., vol. iv, p. 188), may be the same as this species. 



25. Cyclotus Grenadensis, Shuttleworth. PL XXI, Figs. 6-8. 

 JJah. — " Common in shady and rather dry places, hill-sides, cocoa 



orchards, etc., below 2,000 feet ; under rotting leaves and rubbish " 

 (H. H. S.). 



Also occurs at St. Yincent and Trinidad. It "is more common at 

 altitudes of 900 feet and over than at lower altitudes " (Lascellcs). 



26. Xeritina virginea (Linn.). 



Neritina virginea. — Martens, Conch.-Cab., ed. 2, p. 122, pi. x, 

 figs. 5, 6; pi. xiv, figs. 1-21. 



^rt^._<' Common locally in sluggish streams near the sea; not 

 observed in swift streams" (H. H. S.). 



Common in many of the West Indian islands, also on the mainland 

 of S. America ; it occurs in Trinidad. 



27. Ampullabia glauca (Linn.). 



Ampullaria glauca. — Philippi, Conch.-Cab., ed. 2, p. 43, pi. xii, fig. 4 ; 

 Eeeve, Conch. Icon., vol. x, fig. 8o«, b. 



J?ffi5.— British Guiana, Yenezuela, Trinidad; "common in sluggish 

 streams, below 500 feet" (H. H. S.). 



A. crocostoma, Phil., A. luteostoma, Swains., A. castanea, Desh., and 

 A. Oronocensis, Reeve, are varieties of this species. 



It was found by Mr. Lascelles " in a swamp about 800 feet above 

 sea-level." 



28. PALrcESTRiNA CRTSTALLiNA, Pfeiffer. 



Paludina crgstallina, Pfr.— ^Yiegmann's Archiv. f. Xaturg. 1840, 

 p. 253; Philippi, Abbild., vol. i, p. 118, pL i, fig. 18 

 (fig. 17, var. coronata); Kiister, Conch.-Cab., p. 50, pi. x, 

 figs. 7, 8 (figs. 9-12, var. coronata). 



Eydrolia coronata (Pfr.), Martens.— Festschrift Gesell. nat. Freunde, 

 Berlin, 1873, p. 208, pi. ii, fig. 13. 

 Hah.—" Springs and streams below 1,000 feet" (H. H. S.). 

 This species is common to most of the West Indian islands, and 



occurs also on the mainland of S. America. All the specimens from 



Grenada (200-300) have smooth rounded whorls, none exhibiting the 



coronation of the variety. 



VOL. I. OCTOBER, 1895. 22 



