502 



ME. H. K. EIDLET ON TSE 



upper portion of it being most prominent ; the tootli above it upon 

 the body-whorl is single, bifurcating at the end. The three re- 

 maining teeth are rather remote from the margin of the aperture. 

 The anterior part of the last whorl just behind and parallel to 

 the labrum exhibits a longitudinal swelliug or varix, towards 

 which the lip expands. 



5. Stenogyea (Opeas) octonoides, C. B. Adams. 

 Hob. Jamaica, Cuba, St. Thomas. 



This species is more strongly striated than S. suhula, has 

 rounder w^horls, a deeper suture, and a larger apex. 

 Pour specimens were obtained at Platform Island. 



6. Steis'ogtea (Opeas) subula, Pfeiffer. 

 Hah. Cuba, Porto Eico, &c. 



The specimens from Pernando Noronha agree exactly with 

 examples of this species from Porto Eico. They were found 

 beneath stones on the promontory between Chaloupe Bay and 

 S. Antonio Bay. 



7. Stenogyea (Opeas) Beckiana, var. 

 Hal. Island of Opara, Peru, Brazil. 



The shells from Pernando Noronha, obtained at the same spot 

 as the preceding species, answer well to Pfeiffer's description ; 

 but they are onore strongly costulate than Brazilian specimens 

 with which I have compared them. 



III. PEESHWATEE SPECIES. 



1. Planoebis noeonhensis, sp. n. (Plate XXX. figs. 11-11 h.) 



Testa parva, valde compressa, superne in medio depressa, 

 inferne subplanulata, albida, teiiui, subpellucida; anfractus 4, 

 superne convexiusculi, striis incrementi tenuissimis sculpti, 

 inferne radiatim subplicati, ad suturam angustissime marginati, 

 ultimus infra medium obtuse carinatus ; peristoma tenue, mar- 

 gmibus callo filiformi junctis, superiore oblique arcuato. 



Diam. maj. 5 millim., min. 4^, alt. 1. 



This species is about the same size and shape as P. Gilherti, 

 Dunker, and P. fragilis. Brazier, from Australia. The lower 

 surface, however, is flatter, and the curve of the lip different 



