1885.] FROM THE SOLOMON ISLANDS. 603 



47. Melania guppyi. (Plate XXXVII. figs. 6, 6 a.) 



Shell slenderly acuminate, covered with an olive-brown epidermis. 

 Whorls about 14, divided by a very oblique deepish suture, concave 

 above the middle and somewhat convex below it, and then contracted ; 

 ornamented with a few spiral series of nodules (about five on the 

 upper whorls) and rather indistinct, very oblique and flexuous, 

 longitudinal ridges, upon which the nodules rest, also exhibiting very 

 sloping and flexuous lines of growth ; the most conspicuous rows 

 of granules are near the middle of the whorls. Aperture pyriform. 

 Outer lip thin, remarkably sinuated above towards the suture and 

 arcuately prominent below. Columellar margin oblique, straightish, 

 covered with a callus, curving into the broad basal sinus. Length 

 31 millitn., diameter 7; aperture 9 long, 4 wide. 



Hub. "From the stomach and intestines of a fish living in the 

 freshwater lake of Wailava in the island of Santa j^nna" {Giippy). 



This is a very remarkable and distinct species, with a very drawn- 

 out spire, pecuhar granuled sculpture, and a deeply sinuated labrum. 

 1 have much pleasure in naming it after Mr. Guppy, 



48. Cerithidea cornea, A. Adams (var.). 



Hab. From Mangrove swamps, Choiseul Bay {Guppy) ; Andai, 

 New Guinea {Tapparone Canefri) ; Borneo {Adams). 



The specimens from the Solomon Islands vary slightly from the 

 Bornean shells in Cuming's collection. The ribs are 'somewhat 

 farther apart, the body-whorl is rather more distinctly carinate at 

 the periphery, the aperture a trifle larger, the lip being more expanded 

 and more produced to the left over the channel at the base of the 

 columella. The whorls, too, are somewhat higher, for in specimens 

 of the same length I find about a whorl more in the specimens from 

 the Solomon Islands than in the original types. 



49. Nerita marmorata, Hombron and Jacquinot. 



Hab. Found "living just above high-water mark on the surface 

 of the coral-limestone coast, San Christoval " {Guppy); Solomon 

 Islands {Hombron and Jacquinot) . 



This species was described by Reeve (Couchol. Iconica, vol. ix. 

 sp, 47) under the name N. oleagina, a year after the publication of 

 the Zoology of the ' Voyage an Pole Sud ' by Rousseau. Reeve's 

 figure gives a better idea of the mottled colouring than that in 

 Hombron and Jacquinot's Atlas, pi. 16. f. 15-17. Their figure of 

 the operculum does not appear to be quite correct in outhne, judging 

 from those obtained by Mr. Guppy, none of which have the emar- 

 gination on the columellar side in front. 



The apical whorls in all examples are of a lemon-yellow colour, and 

 the columellar margin between the teeth is generally sufi"used with 

 the same tint. Nerita marmorata. Reeve, which is found in the 

 Gulf of Suez, may in future be called M. crassilabrum. 



50. Neritina cornea, Linne. (Plate XXXVII. figs. 7, 7 b.) 

 Hab. Found living on the stems of tree-ferns, betel-nut palms, 



