598 MR. E. A. SMITH ON SHELLS [Juue 2, 



columella is a trifle lower down, the columella itself is pale and 

 marked ofF from the vest of the whorl by a red curved line, and the 

 aperture is less produced or pouting along the lower margin. 



30. Hargravesia polita, H. Adams, \ar. 



Hab. Faro Island, Bougainville Straits ; " in the higher parts of 

 the island up to the summit, 1900 feet above the sea" {Guppy). 



It is not stated by Adams (Proc. Zool. Soc. Lond. 1870, p. 795) 

 from which island of the Solomon group the types were obtained. 

 In all probability they were not from Faro, as the specimen from this 

 locality varies somewhat in form, having a more conical spire, less 

 convex whorls, and the aperture less produced laterally. Should 

 these differences prove constant in a large series of specimens, I 

 should be inclined to consider this form specifically distinct. 

 Hyalopsis tumida, Pease (Amer. Journ. Conch, vii. p. 27), is the same 

 as the present species. 



31. Helicina moquiniana, Recluz. 



Hah. " The island of Ugi, living in a region of coral-limestone at 

 an elevation varying between 300 and 400 feet above the sea " 

 {Gruppy). San Christoval and Guadalcanar Islands (Macgillivray, 

 in Brit. Mus.). 



This species appears to vary in size, colour, the coarseness of the 

 spiral striae, in the acuteness of the central keel, and in the greater 

 or less development of the dentiform projection at the base of the 

 columella. I have no hesitation in pronouncing S. spinifera to 

 be a very slight variation, and indeed //. egregia might almost be 

 regarded in the same light. 



32. Helicina egregia, Pfeiffer. (Plate XXXVI. figs. 10, 10 a.) 

 Hab. " From the coral-limestone region of the east island of the 



Florida group, on leaves" (^O^ippr/). 



The unique type of this species was collected by Macgillivray on 

 the island of Guadalcanar, which is situated just to the south of 

 Florida Island. The operculum is thin, and coloured precisely like 

 that of H. moquiniana, Recluz, and its variety H. spinifera, Pfeiffer, 

 all three being of a dark sanguineous red with the exception of the 

 columellar margin, which is whitish. This species is not keeled at 

 the middle like the two above-named forms, and is more finely 

 striated, and consequently has a smoother surface. 



The three specimens collected by Mr. Guppy are all differently 

 coloured. One is exactly like the type (see fig. 272 in Sowerby's 

 Monograph, Thesaur. Conch, vol. iii., and Conch. Icon. vol. xix. 

 fig. 159) ; another lacks the broad zone on the upper surface ; and the 

 third is uniforml}' light purplish-red, the peristome and aperture 

 being of a more decided red tint. 



33. Helicina modesta, Pfeiffer. 



Hab. Choiseul Bay, Shortland Island, and an islet in Treasury 

 Harbour, Bougainville Straits (Guppy); Guadalcanar Island {Mac- 

 gillivray, in British Museum). 



