1871.] GK and H. Ncvill — Descriptions ofneiv Mollusca. 7 



from these seas, is composed of 8 closely wound whorls, mode- 

 rately elevated and turrited, covered at regular intervals with 

 very strongly developed transverse ribs which fade away towards 

 the obtuse apex, these give it a most interesting appearance under 

 the lens, they are continued on the base of the last whorl, where 

 they almost completely disappear towards the centre, but appear 

 again round the umbilicus ; the aperture is very small, the last 

 whorl angular. Alt. 3 j, Diam. 2 m.m. 

 Rare ; Mahe, (Seychelles). 



Helix (Conulus) sub-turritula, n. sp. 



This small, horn-colored shell is composed of 7 turrited, rapidly 

 elevated whorls, divided by a distinct suture, no sculpture is discer- 

 nible, even under the lens ; apex somewhat mammillated ; last whorl 

 strongly keeled, its base nearly flat, imperforate ; aperture angular, 

 about as high as broad. It can be distinguished from the Indian 

 species of the same type, by its flatter base and less convex whorls. 

 The animal is black mottled with yellow ; it was found in a damp 

 ravine at Mahe (Seychelles), at about 800 ft. above the sea. Alt. 4, 

 Diam. 4J m.m. 



Gibbulina Adamsiana, n. sp., PI. I. Fig. 17. 



Testa cylindrico-fusiformis, alba, vix rimata, teniola, sub-flex- 

 uose costulata, costulis fere rectis ac validis ; anfractibus 8, cylin- 

 dricis, planatis, gradatim accrescentibus, ultimo regulari ; spira 

 obtusa, sutura impressa ; apertura sub-angulatim quadrata, dente 

 parietaliparvo munita, labro reflexo, curvato, labio columellari recto. 

 Long. 18, Diam. max. 6, Alt. apert. 5, Diam. apert. 4j- m.m. 



Very rare, near Curepipe, Mauritius. 



This very distinct, though rare, species most resembles the 

 remarkable G. Nevilli, H. Ad. and 67. Dupontiana, (Journal, Asiatic 

 Society, Vol. xxxix, page 411) ; it is easily distinguished from both 

 by the difference in form and sculpture, from the former, also, by 

 only having 8 whorls, from the latter by the almost entirely 

 concealed, instead of very open, umbilicus. 



Cataulus Nietneri, n . sp., PL I. Fig. 7, la. 



T. parva, sub-fusiformis, vix perforata, apice sub-obtusa ; supra 

 pallide-straminea, infra virescente grisea, et .irregulariter albido 



