186/.] MR. H. ADxVMS ON NEW MAURITIAN SHELLS. 30.') 



albida; spira ci/Iindrica, apice ohtusa, sutura mediocri; anfr.9, 

 lilaniusculis, ultimo non ascendente, basi angidato ; apertura 

 parum obliqua, rhomb eo-ovaU, dente parietali compresso, in- 

 trante, et plica columellari obsoleta munita ; iperist. breviter 

 expanso, maryine dextro iiitus lahiuto, columeflari patente. 

 Long. 24, diam. 6 mill. ; ap. Gg mill, longa, 4 lata. 

 Hab. The Pouce Mountain, Mauritius. 



" The foot of the animal in this species is orange ; the mantle is 

 also orange, slightly mottled with black anteriorly, more densely so 

 posteriorly; and the tentacles are black." — G. Nevill. 



I have named this species in honour of Mr. William Nevill, the 

 father of Mr. Geoffrey Nevill, a gentleman well known as a mine- 

 ralogist. 



GiBBUS (GONIDOMUS) NEWTONI, H. Ad. (PI. XIX. fig. 8.) 



G. testa profunde arcuato-rimata, elongato ovata, oblique costata, 

 pallido-lutea ; spira convexo-conica, sutura impressa ; ar.fr. 8, 

 coHi'exiusculis, ultimo antice ascendente, basi comp>resso ; aper- 

 tura verticali, truncato-oblonga ; 2)erisf. breviter expanso, mar- 

 ginibus callo junctis, dextro intus incrassato, columellari pa- 

 tente. 

 Long. 24, diam. 1 1 mill. ; ap. 7 mill, longa, 6 lata. 

 Hab. Trouaux-Cerfs, Mauritius. 



"This species was first found by Mr. Caldwell at Trou-au-Cerf, 

 and I have since found it alive at the same place. The animal has 

 the foot of a greyish flesh-colour, the mantle light brownish grey 

 closely veined with longitudinal dark brown lines, and the tentacles 

 of a dull purple." — G. Nevill. 



Ennea (Gulella) modesta, H. Ad. (PL XIX. fig. 9.) 



E. testa profunde perforata, ovato-oblonga, tenuiuscula, conferte 

 et minute costulata, nitida, pellucida, corneo-hyalina ; spira 

 ventrosa, sursum tumida, apice convexo-conica, sutura impressa; 

 anfr. 11, convexis, ultimo ascendente, basi rotundato ; apertura 

 verticali, ovali, plica compressa oblique descendente prope in- 

 sertionem maryinis dextri munita ; jjerist. expanso, subsoluto, 

 margine dextro sinuuto, intus tuberculifero. 

 , Long. .5, diam. supra medium 2fj mill. ; ap. \\ mill, longa, 1 mill, 

 lata. 



Hab. Mauritius. 



This species has hitherto been confounded with E. clavulata. Lam., 

 but appears to be distinct. Among many specimens that came under 

 the notice of Mr. G. Nevill there was not one of an intermediate form. 



Cyclostomus (Tropidophora) mauritianus, H. Ad. (PI 

 XIX. fig. 10.) 



C. testa anguste iwibilicata, ovato-conica, tenuiuscula, pnllide 

 fulva, strigis fulvis ornata ; spira conica, apice acutiuscula ; 

 anfr. 5, convexis, bicarinatis, inter carinas undique costis irre- 



Proc. Zool. Soc— 1867, No. XX. 



