Mr. R. J. L. Guppy on Diplommatina Huttoni in Trinidad. 95 



piceous or piceo-ferruginous ; the base of the elytra sometimes 

 ferruginous, aud the rest black ; the legs testaceous, piceo- 

 testaceous, or piceo-ferruginous. Head finely granulose ; the 

 epistome separated from the rest by a very marked line of sepa- 

 ration, and more depressed than the posterior part. Thorax 

 broadest behind the middle ; the truncature rounded, extending 

 pretty far back ; a series of larger teeth and tubercles extending 

 along the sides, others, not so large, across the back part ; the 

 front merely granulose; the anterior margin nearly straight; 

 the posterior half of the thorax granulose or finely tuberculate 

 in the middle, smootl^ shining, and impunctate on the sides ; 

 the basal margin with a transverse depression reaching to the 

 posterior angles, marked with four longitudinal aciculations. 

 Scutellum small. Elytra shining, sparsely and finely punctured, 

 the punctures of different sizes and often indistinct, most deeply 

 marked towards the sides and apex; the apical truncature 

 nearly vertical, with the margin sloped with a gentle curve on 

 the upperside, and with a sharp raised edge on the sides ; 

 the sutural line is also raised, and projects in the middle into 

 two teeth ; there are also two smaller teeth within the truncature 

 near the upper margin, corresponding in position to the termi- 

 nation of the usual cost?e, which are not here present, but within 

 the truncated space ; near the apical margin the truncature is 

 slightly hollowed. The underside is covered with a pale chestnut 

 pubescence. 



Four or five specimens of this have been received. 



[To be continued.] 



XII. — On the Occurrence q/" Diplommatina Huttoni in Trinidad, 

 By R. J. Lechmere Guppy, F.G.S., F.L.S. 



By the kindness of my friend Mr. Thomas Bland, F.G.S., of 

 New York, I was made aware of the discovery, by Mr. Theodore 

 Gill, in Trinidad, of a minute land-shell, which was believed by 

 Dr. Pfeiffer to be identical with the East-Indian Diplommatina 

 Huttoni. On the receipt of this information I took the earliest 

 opportunity of making an expedition with the view of discover- 

 ing this little shell, which had previously escaped my search. 

 1 was fortunate beyond my anticipation in finding the Diplom- 

 matina; but upon the first search I only found two perfect ex- 

 amples. Subsequently, however, I had the good fortune, on 

 revisiting the same locality, to obtain more than twenty living 

 examples. I could not, however, induce the mollusks to show 

 themselves out of their shells; and I was obliged to destroy 

 several in order to obtain a sight of the operculum and the 



