1871.] Q. and H. Nevill — Descriptions of new Mollusca. 3 



Cylichna involuta, n. sp., PI. I. Fig. 3, 3a. 



T. cylindrica, solida, alba, lsevis, nitida ; anfractibus tribus, 

 sutura sub-canaliculata junctis, spira sub-conica, exserta, apice sub- 

 mammillato ; labro fere recto, tenui, labio crassiusculo, infra incurvo ; 

 columella uniplicata. Long 8|, Diam. 3^ m. m. 



S. Province, Ceylon. — Bombay and Penang (Dr. F. Stol.). 



Kingicula apieata, n. sp., PL I. Fig. 10, 10a. 



T. minuta, elongato-turrita, solidiuscula, lsevis ; spira acutissima, 

 sutura perdistincta ; anfractibus quinis, ultimo maximo, oblongo 

 ac ventricoso, labio truncato, medio unidentato ; columella duabus 

 plicis validis munita ; labro incrassato, medio interne sub-denticu- 

 lato, ad basin sub-truncato. Long. 2|, Diam. 1^ m. m. 



Very rare, Pt. Louis Harbour, Mauritius. 



Gibbula Holdsworthana, n. sp., PI. I. Fig. 18. 



T. parva, turbinata, tenuis, cornea, sparsim irregulariter viride 

 marmorata, ad basin dense nigro -viride punctata ; anfractibus 

 quinis, angulatis, ad suturam oblique deplanatis, indistincter 

 biplicatis, superioribus infra carinis duabus, acutis, validis, ultimo 

 tribus instructis ; basi sub-applanata, tribus carinis sub -granulosis 

 instructa, una valida ad marginem umbilici sita ; umbilico intus 

 spiraliter costulato ; apertura fere circulari, labro simplici, interne 

 distincter margaritaceo. Alt. 4£, Diam. 3f m.m. 



Pare ; S. Province, Ceylon. 



This is another small shell belonging to the same group, as the 

 one described by us in the Society's Journal for 1869, p. 159, un- 

 der the name of 67. sub-plicata, in the present species the sculpture 

 is more regular and the colouring more vivid, being slightly flamed 

 with a very dark green, principally on the whorls near the apex ; 

 also closely dotted with the same on its base ; the umbilicus is wider 

 &c. The generic characters would seem to indicate an intermediate 

 position between Gibbula and Margarita. 



Robinsonia, nobis. 

 Ceylon Asiat. Soc. Proc. May, 1869. 



The shells of this genus are of a JVaticoid appearance, of a thin, 

 delicate texture, composed of a few rapidly increasing whorls, 



