306 MR. H. ADAMS ON NEW MAURITIAN SHELLS. [Mar. 14, 



gulai'ibus subdistantibus mitnitis ; apertura vix obliqua, subcir- 

 culari ; jjerist. shnplici, marginibus approximatis, callo tenui 

 junctis, margine dextro recto, columellari medioci'iter expanso. 



Diam. maj. 14, min. 12, alt. 17 mill. 



Hab. The Pouce Mountain, Mauritius. 



Cyclostomus scaber, H. Ad. (PI. XIX. fig. 11.) 



C. testa profunde umbilicata, globoso-turbinata, tenuiuscula, spi- 

 i'aliter costulis subdistantibus et longitudinaliter striis elevatis 

 decussata, basi costulis spiralibus propioi'ibus, in umbilico re- 

 motioribus, 2}allide carnea, fascia rufa angusta infra periphe- 

 riam ornata ; spira turbinata, apice obtusiuscula ; anfr. 5, 

 convexis, ultimo rotunduto ; apertura verticali, circulari; perist. 

 simplici, recto, continuo, superne subangulato, breviter adnata. 



Diam. maj. 12, min. 10, alt. 11 mill. 



Hab. The Pouce Mountain, Mauritius. 



Omphalotropis costellata, H. Ad. (PI. XIX. fig. 12.) 



O. testa umbilicata, ovato-conica, tenuiuscula, spiraliter costulis 

 fliformibus subdistantibus, circa umbiliciim remotioribus, 

 su]jerne fere obsoletis munita, jyallide carnea, versus apicem 

 rubida, strigis fulguratis rujis picta ; spira cotiica, apice acu- 

 tiuscula, sutura profunda ; anfr. 7, convexiuscidis, ultimo ro- 

 tundato, in umbilico liris cequalibus munito ; apertura subver- 

 ticali, ovuli ; perist. recto, acuto, marginibus callo tenui junctis, 

 columellari subincrassato, expaniusculo. 



Long. 10, diam. 7 mill. ; ap. 6 mill, longa. 



Hab. The Pouce Mountain, Mauritius. 



Omphalotropis picturata, H. Ad. (PI. XIX. fig. 13.) 



O. testa perforata, ovato-conica, oblique confertim striatula, 

 corneo-rufa, maculis et strigis albis notata ; spira conica, apice 

 acuminata, sutura submarginata et crenulata ; anfr. 6, con- 

 vexiusculis, ultimo rotundato ; apertura subverticali, oblongo- 

 ovata ; perist. simplici, margine dextro recto, columellari vix 

 expansiusculo. 

 Long. 6, diam. 3 mill. ; ap. 2 mill, longa. 

 Hab. The Pouce Mountain, Mauritius. 



" The animal in this species has the tentacles yellow, tipped with 

 dark brown ; the foot almost white ; the mantle a kind of gre} 

 (varying), with its sides dark brown, and the same colour between 

 the tentacles." — G. Nevill. 



Cassidula parva, H. Ad. (PI. XIX. fig. 14.) 

 C. testa subperforata, ovato-conica, solidula, spiraliter confertim 

 costulata (^prope suturam costulis majoribus), longitudinaliter 

 minute striata, sordide alba ; spira conica, apice mucronata ; 

 anfr. 6, convexiusculis, ultimo basi attenuato, antice crista ob- 

 tusa munito; apertura subobliqua, ovali ; plica parietali I, 

 compressa, snbtransversa, nodulo supero obsoleto ; jjlica coin- 



