128 NEAV UNIONID^, MELANID^, ETC., 



tures linear; whorls 11 — 12, flattened; aperture rather large, ovate, within pale 

 brown ; columella white and incurved. 



Proc. Acad. Nat. Sci. 1856, p. 144. 



nab. — Sandwich Islands, E. Verreaux. 



My cabinet and cabinet of E. Verreaux, Paris. 

 Diam. -63, Length 1'70 inch. 



Remarhs. — The three specimens before me are large, all well characterized and 

 nearly of the same size. This sjaecies is allied to LargiUierti, Phil., and varicosa, 

 Trosch., but more closely to the former, which comes from Central America. It 

 differs in the number of the whorls, having two or three more than LargiUierti, in 

 being rather more slender, and in the mouth being rather more rounded. The base 

 of the columella is a little more rounded. Aperture about one-third the length of 

 the shell. 



I name this species after M. Edward Verreaux, who collected it during one of his 

 long voyages to the Pacific in search of objects in Natural History. 



Melania fraterna. pi. 22, fig. 28. 



Testa plicata, pyramidata, subcrassa, tenebroso-brunnea ; spira elevata ; suturis irregulariter impressis ; 

 anfractibus subplanulatis, transversim lineis impressis regulariter cinctis, costellis verticallibus ; aper- 

 tura parva, subovata, intus albida ; labro acuto ; columella contorta, superne incrassata, inferne sub- 

 emarginata. 



Shell folded, pyramidal, rather thick, dark brown, spire elevated; sutures irregu- 

 larly impressed ; whorls rather flattened, bound with irregularly impressed transverse 

 lines, and having vertical ribs; aperture small, suboval, within whitish ; outer lip 

 acute ; columella twisted, thickened above and emarginate below. 

 Proc. Acad. Nat. Sci., 1856, p. 144. 



Hab.— 



My cabinet. 

 Diam. -50, Length 1-68 inch. 



RemarTcs. — I purchased the specimen before me many years since in Paris, and have 

 never seen a second one since. I am entirely ignorant of what part of the world it 

 came from. The top of this specimen is broken off. The number of whorls remain- 

 ing is seven, and there probably have been about five more. The ribs are well 

 marked, strong and numerous, being about seventeen. The lower whorl is nearly 

 destitute of them, and it is constricted on the lower half The transverse lines cover 

 every part of the whorls. The aperture is slightly channelled above and below, thus 

 approaching the genus Pirena. It is very near to M. transversa (nobis,) but differs 

 in being of a more slender form, more attenuate, and in having a smaller mouth which 



