OF CONCHOLOGY. 179 



Guppy described this (Ann. and Mag., 1864,) as Trinitensis, 

 but corrected the error in 1866. 



3. Cyclotus rugatus, Guppy. Ann. and Mag., xiv, 1864. 



Northern range of hills, where it is found up to 2,000 feet. 

 Guppy. One dead and imperfect specimen was collected by Gill. 



4. Cistula (Adamsiella) Aripensis, Guppy. Ann. and Mag,, 



xiv, 1864. 



On the Cerros of Aripo, at a height of 2,000—2,500 feet, 

 where it lives amongst the dead leaves in the forest. Guppy. 

 Guppy described this as an Adamsiella, but the operculum is de- 

 cidedly calcareous, and I refer it to Cistula. In form, size and 

 general aspect, this species is allied to the Mexican Qhondropoma 

 Cordovanum, Pfeiffer. Guppy remarks : — " It differs very con- 

 siderably from any other Adamsiella that I have seen, and ap- 

 proaches Cyclostomus in many of its characters." 



5. Helicina nemoralis, Guppy. Ann. and Mag., xvii, 1866. 



On the leaves of trees in the forests. Guppy. 



Guppy originally described this as II. zonata (Ann. and 

 Mag., xiv, 1864), but finding the name pre-occupied, adopted 

 that of nemoralis. The species belongs to the globose turbinate 

 group of the Mexican fauna. 



6. Helicina Dysoni, Pfeiffer. 



Found on all parts of the island where the ground is some- 

 what open ; it rarely occurs in the forest. Gill, Guppy. Also 

 Honduras. 



Guppy described this (Ann. and Mag., xiv, 1864) as II. bar- 

 bata, and subsequently referred to its close relation with H. Dy- 

 soni, with which Pfeiffer pronounced specimens, collected by Gill, 

 to be identical. 



7. Helicina lamellosa, Guppy. Ann. and Mag., xix. 



Found at the Cotoras Islets. Guppy. 



This pretty species is allied to H. lirata, Pfr., of Mexico. 

 Guppy provisionally constitutes the new subgenus Perenna for 

 this shell. 



8. Helicina ignicoma, Guppy. Ann. and Mag., June, 1868. 

 Mountains of Aripo, Guppy. 



9. Stenopus lividus ? Guilding. (Zool. Jour., iii, p. 528, t., 



suppl. 27, f. 1-3.) 



Trinidad. Gill. 



