GUPPY : MOLLUSCA OF TRINIDAD. 211 



I proceed to give a catalogue of the species. As the 

 original authorities have been quoted by Crosse, I do not think 

 it necessary to occupy space with them here, but, where possible, 

 I give a citation of a figure. 



I. Geostilbia minutissima Guppy. 

 Glandina minutissima Guppy, Proc. Scient, Assoc, Trinidad, 



1869, p. 239. Crosse, 'Journal de Conchyliologie,' Jan., 



1890, p. 36, pi. ii., f. I. 



A very minute glassy hyaline smooth shining fusiformly- 

 cylindrical shell with five whorls, of which the last forms more 

 than half of the length of the shell ; spire short, with an obtuse 

 apex ; aperture elongate-oval, narrow above, wide below ; 

 outer lip simple ; columella scarcely truncate ; height 2 mill. ; 

 diameter | mill, 



A minute shell, bearing some resemblance in general aspect 

 to Glandina (e.g. GL solidiila Pf. Cuba). It varies a good deal. 



In 1867 M. Crosse described ('Journ. de Conch.,' vol. xv., 

 p. 184) the genus Geostilbia. The following species have been 

 attributed to it : — 



1 iota Adams, Jamaica. 



mazei Crosse, 'J. de C.,' 1883, p. 7, pi. i., f. 2, Guadeloupe. 



2 caledonica Crosse, 'J. de C.,' 1867, p. 184, pi. vii., f 4, 



New Caledonia. 



3 biandiana Crosse, 'J. de C.,' 1880, p. 149, and 1886, p. 137, 



pi. i., f 4, Para. 



4 mariei Crosse, 'J. de C.,' 1880, p, 149; i88i,p, 200, pi. viii., 



f. 5, Nossibe. 



5 gundlachi, Pf. 'J. de C.,' 1883, p. 7, pi, i,, f. i, Guadeloupe. 



6 comorensis Mor., 'J. de C.,' 1883, p. 196, pi. viii., f. 7, 



Comors. 



To these we may have to add the following, or some of 

 them : — 

 Achatina michaudiana Orb., 'Moll. Cuba,' vol. i,, p. 170, 



pi, xi,, f 10 — 12, Cuba. 



