1885.] FROM THE SOLOMON ISLANDS. 607 



None of the specimens from the above localities are large, but 

 are very variable in the style of their coloration, some from Ugi 

 being precisely like N. pulclira of Sowerby, wrongly said to have 

 been found at Panama. The operculum in all, however, is of the 

 same slaty-black colour, with the pale spot at the nuclear end. The 

 majority have the red stain on the columella more or less intense, 

 but a few have the columella uniformly bluish-white. 



61. Neritina turtoni, Recluz. 



Hab. From a stream, Shortland Island, and found " imbedded in 

 a dark calcareous loam exposed in the banks of a large stream at 

 Sulagina on the north coast of San Christoval " {Chippy); Guadal- 

 canar Island, in streams {Macgillivray, in Erit. Mus.). 



The specimens from the Solomon Islands appear to be marked 

 very much alike ; they are all coloured with oblique, fine, more or 

 less undulating or zigzag black and yellow lines, of which the latter 

 are invariably the finest and indeed hair-like. 



The largest specimens are those from Guadalcanar, measuring 

 twenty-five millims. from the apex to lower margin of the aperture" 

 The dead specimens from San Christoval retain the external pohsh 

 and markings, although probably somewhat altered in tint ; the black 

 lines being of a dark slate-colour and the yellow lines white or lilac. 

 The apertures and columella have lost all colour and are of a white 

 chalky texture. In these specimens the columellar surface seems to 

 be rather more convex than usual ; but still I have no doubt they 

 belong to this species. 



62. Neritina brevispina, Lamarck. 



Hab. From streams in Shortland, Treasury, and Ugi Islands. 



The shells from the first and last of these locanties closely resemble 

 figures 24 a, b {N.subyranosa) in Reeve's monograph of this genus 

 in the ' Conchologia Iconica.' Two specimens, however, are rather 

 different, being smoother and very closely and finely lineated with 

 black as in N. penicillctta, Gould, which I regard, as a variety of 

 this species. The specimens from Treasury Island have the same 

 kind of sculpture, but are entirely destitute of spines. 



63. Neritina squarrosa, Recluz. 

 Hab. From streams in Treasury Island. 



This species has not been previously recorded from the Solomon 

 Islands. The only specimen obtained is grey, faintly zoned with a 

 darker tint, has many of the triangular warts whitish, and the 

 coUumella yellowish ; it is 27 millims. in diameter. 



64. Neritina sangtjisuga. Reeve. 

 Hab. Faro Island. 



This species may be the N. macrocephala of Le Guillon, as suggested 

 by Martens, but it does not correspond in all respects with the 

 original description in the 'Revue Zoologique' for 1841. The Solomon- 

 Island specimens are only half the length of the specimen figured by 



