2l8 GUPPY : MOLLUSCA OF TRINIDAD. 



I may observe that the form from the Grenadines described 

 by Guilding as B. undulahis has more claims to be ranked 

 as a species than many shells admitted without question 



as such. 



17. Bulimus oblongus Miill. 



Wood, I. T. 'Helix,' pi. 33, f. loi (not 102). 

 D'Orbigny, 'Voy. Amer. Merid.,' pi. xxxvii, f. i. 

 Woodward, ' Man. Moll.,' pi. xii., f. 10. 

 Crosse, ' Journ. de Conch,' 1890, p. 40, No. 14. 



I have given a note on some of the anatomical characters 

 of this mollusk in Proc. Zool. Soc, 1892, p. 271. 



18. Bulimus glaber Gmelin. 

 var. auris-sciuri Guppy. 



Crosse, I.e., p. 40, No. 16. 



19. Bulimulus pilosus Guppy. 

 'Amer. Journ. Conch.,' 1870, p. 310, pi. xvii,, f. 12 (not 9). 

 Crosse, 'Journ. de Conch.' 1890, p. 43, No. 20, pi. ii., i. 3. 



An oblong-conic thin horny-brown-colored shell of about 

 6 whorls covered with a fine pubescence. Length r4 mill, 

 diameter 7 mill. Allied to B. debilis, const rictus, &c., of 

 South America. I note the resemblance in shape to species 

 of the genus BuVuninus (e.g. gri/ereanus and tarnieranus, 

 Grasset— Canaries, 'Journ. Conch.,' 1856, p. 346, pi. xiii). 



20. Bulimulus tenuissimus Fer. 

 Crosse, I.e., p. 43, No. 19. 



An oblong-conic thin pale horny-brown or almost colorless 

 shell of about seven whorls, differs from the preceding in its 

 more elongate proportions and the absence of pubescence. Its 

 umbilicus is only a chink. Length 18 mill., diameter 



8 mill. 



21. Bulimulus aureolus Guppy. 



Crosse, I.e., p. 42, No. 17. 



A subperforate ovate-conic rather acuminate thin yellow 

 shell of 5 — 6 whorls, sometimes banded. Length 25 mill., 



J.C, vii.. Tuly jSqj. 



