348 LAND AND FRi:SH-WATER SHELLS. 



sutures of the upfjcr whorls, and three upon the last, one sutural, 

 the second peripheral, and the tliird basal. Volutions 6, ratlier 

 slowly enlarging, a little convex, sculptured with fine oblique striae 

 of growth, not glossy. Three first whorls livid purplish, the last 

 rather sharply angled at the middle, not descending in front, having 

 the basal band broad su-ound the almost concealed perforation, 

 and ol)Solete within the apsrture. The latter is oblique, somewhat 

 narrowed and pouting in front, banded within with three almost 

 black and two white bands, the central one of the former being 

 squarely truncate at the end, only the lower corner of it touching 

 the margin of the lip, which is pale oblique, receding, a little ex- 

 panded and reflexed in front and at the columeliar margin, the 

 upper end of which is spi-ead over and nearly conceals the small 

 mubilicus. Height 22 J- millim., greatest diameter 19, smallest 16. 

 This species is remarkable for the striking contrast of its colour- 

 bands and the angular character of the last whorl. 

 (12) Hel'ix {Geotwchus) dampieri, Angas, var. (Plate XXXVI. tig. 5.) 

 Shell imperforate, subglobose, conoid, light brown or fawn-colour, 

 here and there minutely dotted with dark-grey specks, with a broad 

 white hand around the middle of the penultimate whorl and two 

 upon the last, one above and the other below the middle, also a 

 narrow white line revolving up the spire beneath the suture, and a 

 dark bro\\n zone surrounding the jjale or yellowish umbilical 

 region. Whorls 5, a little convex above, somewhat glossy, obliquely 

 and very finely striated by the lines of growth, the last more or less 

 concentrically stratied beneath, shortly descending at the aperture 

 which is white within. Lip a little thickened, edged with recdish 

 brown, only slightly expanded on the right side, more dilated below, 

 produced into a thin transparent callosity over the umbilical region, 

 united above to the upper extremity of the peristome. Columeliar 

 margin oblique, white or partly tinged with reddish brown, thickened 

 and terminating below within the edge of the lip. Height ID 

 millim., grcate-.t diam. 22, smi\llest 19. 



The specimens from the Solomon Islands are smaller than th.- 

 type with which, through tlie kindness of Mr (i. F. Angas, I have 

 compared them. They also h;ive the peristome brown, and the basal 

 band is darker. 

 (14) Jlelii- (Geotroc/nis) cknjJ, Recluz (Plate XXXVI. figs G, G l>). The 

 specimens from Santa Anna (var. meridionalis fig. 6 b) are smaller 

 than the type, pale brown above, with a white thread-like line at 

 the suture, and the acutely keeled periphery, paler beneath, 

 especially towards the centre, and have the aperture particularly 

 acuminate at the tei*mination of the keel. 



The specimens from Simlio (var. siniboana, fig. 6 a) are uniformly 

 pale hoi-n-colour, rather sharply carinate at the middle, and have the 

 peristome white, considerably thickened and almost notched at the 

 upper end of the columella, and the body-whorl is more contracted 

 than in the typical form. The examples from Choiseul Bav, Shortland 

 and Treasury Islands (var. septenfrionalis, fig. 6) are all alike, of 

 sn.aller dimensions than the normal form, thin pale brownish horn- 

 colour, with rather more convex wliorls than usual, the carina at the 

 periphery being acute and thread-like as in the variety simhoana. 



Whether these t-everal varieties should take specific rank is ques- 

 tionable, for, although there is considerable difference between the 

 extreme form seven in the series of nearlv one hundred specimens 



