Binncy on Terrestrial Mollusks. 187 



niodo conspieuis, vol evanescentibus munita, nitida, pcllucida, corneo- 

 flava vel liyalina ; anfr. superst. 4 convexiusculi, medio planati, regulariter 

 accrescentos, ultimus ba.si non cristatus ; apertura vorticalis,anipla, an<;u- 

 lato-ovalis, basi subeffiisa ; perist. leviter inc-rassatuui, niargine extorno 

 subproducto, columellari breviter reflexo, adnato et supern6 incrassato. 

 (Pfr.) 



SYNONYMS AND REFERENCES. 



Iklix svbcylindrica Pulteney, Cat. Dorsetsh. p. 49. 



]\I()NTAGU, Test. 15r. ii. p. 393. 

 Truncatella suhcylbulrica Gray in 'lurtdn's ^lan. p. 22, f. 6. 



Shuttlewohth, Diagn. 7, p. 154. 



Pfeiffek, Mon. Auric. Viv. 187; Mon. Phaii. Viv. ii. 7. 



Orbigny, Moll. Cub. ii. p. 5, (excl. T. truncatula.) 

 Truncdtflla t)-uncatula Lowe, in Zool. Proc. 1845, p. 217?; in Zoiil. .Journ. V- 



p. 299, tab. 13, fiss. 1.3-18.'? 

 Ti-uncatella Caribceensis Pfeiffer in Zeitscli. f. Mai. 1846, p. 182, ex parte. 

 Ki3sTER in Cliemn. ed. 2, Auric, pi. ii. figs. 1-4. 



DESCRIPTION. 



Animal not observed. 



Shell scarcely perforated or grooved, cylindrical, with 

 crowded numerous ribs, sometimes quite imperceptible, 

 and sometimes perceptible at the suture alone, shining, 

 pellucid, light horn-color; four remaining whorls, rather 

 convex, flattened at the middle, regularly increasing, the 

 last one not prominently carinated at its base ; aperture 

 vertical, large, oval, with an angle above, spreading below ; 

 peristome slightly thickened, its outer margin slightly drawn 

 out, reflected at the columellar, and thickened. 



Length, 5 ; breadth, 2 millimetres. Aperture 2 mill, 

 long. 



Geographical Distribution. Found among rubbish from 

 Florida Keys. Also is a common West Indian species. 



Remarks. I have given the figure from Chemnitz to 

 which Pfeiffer refers. Kiister confounded it with the pre- 

 ceding species, from some forms of which it appears very 

 difficult to separate it. Orbigny refers it to T. truncatula, 

 a species described by Lowe from Madeira. 



The sheU of which the base is given (fig. 8) was found 



