18G8.] MR. H. ADAMS ON NEW MASCARENE SHELLS. 291 



culo parietali munita; perist. vix expanso, murgiaibus remotis, 



callo tenui junctis , dextro sinuato. 

 Long. 44, diam. 2 mill. 

 Hab. Isle of Bourbon. 



GiBBUS (Gibbulina) moreleti, H, Ad. (PI. XXVIII. fig. 10.) 



G. testa rimata, ovato-cylindrucea, soUdiuscula, oblique confertim 

 striata, sordide alba ; spira cylindracea, apice obtuse conico, su- 

 tura submarqinata ; anfr. 1\, planiusculis, ultimo basi compresso, 

 antice leviter ascendente ; columella calloso-plicata ; apertura 

 parum obliqua, subtruncato-ovali, deiite parietali nulla ; perist. 

 expanso et rejiexiusculo, marginibus subparallelis, columellari su- 

 perne paulum dilatato, palente. 



Long. 11, diam. 4| mill. ; ap. 4 mill, longa, 2| lata. 



Hab. Silhouette Island, Seychelles. 



GiBBUS (Gibbulina) cylindrellus, H. Ad. (PI. XXVIII. 

 fig. 11.) 



G. testa arcuuto-rimala, cyliiidrica, tenui, oblique costata, sordide 

 alba ; spira supra medium paulo latiore, turn in conum brevem ob- 

 tusum terminata, sutura mediocri ; anfr. \0, subplanatis, ultimo 

 leviter ascendente, basi compresso ; apertura verticali, truncato- 

 ovali, dente parietali valido compresso munita; perist breviter 

 expanso et reflexo, marginibus subparallelis, callo tenui junctis . 



Long. 11, diam. 3| mill. ; ap. 3 mill. longa, 2 lata. 



Hab. Isle of Bourbon. 



Ennea (Elma) nevilli, II. Ad. (PL XXVIII. fig. 12.) \\ 



E. testa imperforata, subcylindrica, solidula, nitidula, obsolete lon- 

 gitudinaliter striata, albida ; spira elongata, sursum attenuata, 

 apice obtttso, sutura marginata ; anfr. 9, planiusculis, ultimo basi 

 rotundato ; columella vix torta, callosa ; apertura verticali, sub- 

 ovali, antice leviter ascendente; perist. tenui, breviter reflexo, 

 margine dextro flexuoso, ad insertionem attenuato, hasali cum 

 columellam angulum obtusum formante. 

 Long. 20, diam. ,5 mill. ; ap. 6 mill, longa, 3| lata. 

 Hab. Seychelle Islands. 



The species upon which I founded the subgenus Elma, viz. E. 

 swinhoei, although an African form, was collected by Mr. Swinhoe 

 in the Island of Formosa, where I presume it must at some remote 

 period have been introduced. The other species known at the time 

 were from Prince Edward's Island. Another, however, has been 

 since described by Dr. Dohrn, also from the latter locality ; and he, 

 at the same time, created a genus, under the name of Strepstostele, 

 to receive it. It is therefore of much interest to find an e.\ample 

 inhabiting the Seychelles. 



Cyathopoma blanfordi, H. Ad. (PI. XXVIII. fig. 13.) (^tn 



C. testa aperte umbilicafa, dejjresso-turbinala, Hrulis confertis cincta, 



