126 NEW UNIONID^, MELANIDiE, ETC., 



Remarks. — One of the two specimens before me is much more distinctly striate than 

 the other, but they are evidently the same. In form and size this species is near to 

 Myersiana, herein described. It is also near to iorquata Phili., (Conch., vol. 1, pi. 1, 

 f. 18,) and it somewhat resembles scilicula Gould, (Expl. Exp., pi. 10, f. 164.) The 

 aperture is about one-third the length of the shell. 



Melania Manillaensis. PL 22, fig. 24. 



Testa crebri-plicata, attenuata, tenui, nigricanti ; spira elevata ; suturis impressis ; anfractibus planulatis, 

 superne canaliculatis, transversim lineis impressis ; apertura parva, elliptica, superne obtuso-angulata, 

 intus tenebrosa ; labro acuto ; columella alba tortaque. 



Shell thickly folded, attenuate, thin, blackish ; spire elevated ; sutures impressed ; 

 whorls flattened, canaliculate above, with transverse impressed lines ; aperture small, 

 elliptical, above obtusely angular, dark within ; outer lip acute ; columella white and 

 twisted. 



M. australis.'^ Proc. Acad. Nat. Sci., 1856, p. 145. 



So&.— Manilla, W. Newcomb, M. D. 



Cabinet of Dr. Newcomb. 

 Diam. '27, Length -80 inch. 



Bemarhs. — This well defined species is quite distinct from any which I have before 

 seen. It has about seventeen straight folds, which are deeply decussated by the trans- 

 verse striae. The folds do not reach to the sutures, but are suddenly arrested by a 

 channel below the sutures. It is a graceful species, and it is to be regretted that only 

 a single rather imperfect specimen was obtained. There are only three perfect whorls 

 remaining, which is probably not half the perfect number. The aperture is likely to 

 be one-fourth the length of the perfect shell. 



Melania ltr^eformis. PI. 22, fig. 25. 



Testa plicata, conoidea, subcrassa, tenebroso-fusca ; spira curta ; suturis irregulariter impressis ; anfractibus 

 convexiusculis, superne regulariter costatis, inferne transversim striatis ; apertura parva, elliptica, intus 

 albida ; labro acuto ; columella incurva tortaque. 



Shell plicate, conoidal, rather thick, dark brown ; spire short ; sutures irregularly 

 impressed; whorls somewhat convex, above regularly ribbed, below transversely 

 striate ; aperture small, elliptical, whitish within, outer lip acute ; columella incurved " 



and twisted. 



« 



Proc. Acad. Nat. Sci., 1856, p. 145. 



JBaZ).— Manilla, W. Newcomb, M. D. 

 Cabinet of Dr. Newcomb. 

 Diam. "32, Length '75 inch. 



*AustTalis having been used by myself in the Proc. Zoological Society, in 1850, 1 change the name to Manillaensis." 



