PLACOSTYLUS, SOLOMON IS. 9f 



not allied to P. seemanni in the Viti group. It varies remarkably in 

 contour, as Mr. Smith has noted, and is sometimes greatly length- 

 ened, a specimen taken by Mr. Guppy measuring 104 mill, long, 29 

 wide, while that shown in fig. 70 is almost as long. The other ordi- 

 nary variation is illustrated in fig. 69, the shell being shouldered and 

 constricted. The type (fig. 68) was a regularly oblong shell. The 

 callus of the outer lip is more or less excavated above, as usual in the 

 genus. PfeifFer states that young shells have a green epidermis, but 

 this is wholly lost in adults. 



The species is named for M. Hanet-Clery, who collected the first 

 specimens. 



P. SANCHRIS*TOVALENSIS (Cox). PI. 37, fig. 48. 



Shell perforate, fusiform, thin but moderately strong; yellow or 

 olive-yellow, spotted with irregular longitudinal blotches, sometimes 

 triangular, and small oval spots of blackish-brown, becoming more 

 diluted, dusky-olive, on the latter half of the last whorl, or some- 

 times the spots are rather large and pale olive or olive-brown 

 throughout ; the spire roseate. Surface glossy, densely corrugated 

 spirally, the wrinkles occasionally confluent, this sculpture fainter on 

 the penult, whorl ; the earlier 3^ whorls densely punctate. Spire 

 slender, elongate, the apex obtuse. Whorls 5J to 6, but slightly 

 convex, the last oblong. Aperture long-ovate, white within ; peri- 

 stome broadly bordered with red-orange, narrowly or rather widely re- 

 flexed, hardly thickened within. Columella expanded and forked 

 at the insertion, produced in a long spiral fold ; parietal callus thin 

 and transparent. 



Alt. 66, diam. 26, longest axis of aperture 36^ mill. 



Alt. 63, diam. 25, longest axis of aperture 36J mill. 



Alt. 71, diam. 29, longest axis of aperture 38-J- mill. 



San Christoval, Solomon Group. 



Bulimus san-christovalensis Cox, P. Z. S. 1870, p. 172, pi. 16, 

 f. 7. PFR., Monogr. viii, p. 27. Placostylus sanchristovalensis 

 KOBELT, Conchyl. Cab., p. 34, pi. 8, f. 4, 5. 



A charming snail, somewhat like P. hargravesi in pattern, but 

 more brilliantly colored, more strongly sculptured, and differing in 

 form. Moreover, this species has 3J nepionic whorls, while P. 

 hargravesi is like the majority of the Solomon Island species in hav- 

 ing but 2^. Viewed from the base, the spiral trend of the columella 

 7 



