Molluscan Fauna of St. Helena. 133 



than the minute forms obtained by Capt. Turton. It will be 

 noticed in the following list that in cases where the species 

 attain in the adult state any size whatever [e. g. the Natica, 

 the Nassa, the Littortna, the Ilipponyx, the Gadinia, and the 

 two Areas) only extremely young specimens occurred. 

 About ten or a dozen other species were obtained, but they 

 are either too fragmentary or in too bad condition for deter- 

 mination. Like those which have been identified they 

 evidently belong to the existing fauna. Tiie descriptions or 

 references of the thirty-three species enumerated may be 

 found in the Proc. Zool. iSoc. 1890, pp. 255-305. 



With one or two exceptions all traces of colour have left 

 the shells, but the well-preserved condition of many of tliem 

 would appear to indicate that they had not been buried or 

 exposed to weathering for any very long period. 



Besides the shells, two valves of a species of Lepas allied 

 to L. anserijeraf Linn., were found by Capt. Turton inland 

 at another part of the island. These, being very thin and 

 light, might also have been carried there by the wind or by 

 birds ; and it is possible that to the latter agency the presence 

 is accountable of " what appeared to be a lava internal cast 

 of a bivalve shell, about 6 inches in length," found by 

 Mr. Melliss * at the summit of High Knoll at an elevation 

 above the sea of 1900 feet. 



1. Columhella (Jfttrella) sanctce-helence, Smith. 



Three small specimens are probably the young of this 

 species. 



2. Pleurotoma [Clavus) prolongataj Smith. 

 A few immature specimens. 



3. Pleurotoma {Olathurella?) usta, Smith. 



The specimens which apparently belong to this species 

 have a few denticles within the outer lip. In the type the 

 labrum has the appearance of not being quite fully developed, 

 which might account for the absence of tiie tubercles. 



4. Nassa sanctce-helence, A. Adams. 

 Several young specimens only. 



* 'St. Helenn,' by J. C. Melliss (1875), p. 61. 



