Zoological Society. 67 



crassd, tenehroso-corned ; spird subelevaid ; suturis valde im~ 

 pressis ; anfractihus convexis, infra suturas impressis, siriis ere- 

 bris impressis ; aperturdparvd, ovatd, intus ccerulescente, ad basim 

 rotunda ; columella regulariter incurvatd. 

 Hah, Naga, Luzon, Philippines. 

 Length V^, diam. '5 of an inch. 



Remarks. — The species has a very close resemhlance to the striate 

 varieties of M. Virginica, Say. The three adult specimens under 

 examination are truncate, and the number of whorls therefore not 

 ascertainable, but probably about nine. The impressed revolving 

 lines are somewhat distant, regular and delicate. Between these, 

 under the microscope, may be seen very minute revolving strife. The 

 aperture is about one-fourth the length of the shell. The operculum 

 has its polar point near to the edge of the lower margin. 



Melania Luzoniensis. M. testd striatd, comedy subtenui, tene- 

 hroso-corned; spird erosd; suturis impressis; anfractihus sex, 

 convexiusculis, transversim lineis rugosis impressis cinctis ; aper* 

 turd magna, elongato-ellipticd, intus rubiginosd; columella alba 

 tortdque. 

 Hah. Small streams, Calanang, province of Bai, Philippines. 

 Length 1*1, diam. '5 of an inch. 



Remarks. — There is no peculiarity in the outline of this species, 

 and the most striking character is perhaps in the impressed lines, 

 which are somewhat distant, having minute numerous wrinkles across 

 the groove. They are very distinctly visible under the microscope, 

 and do not seem to have been observed in any other species. The 

 superior part of the whorls is disposed to be granose, and one speci- 

 men has four rows of granules. Immediately under the sutures there 

 is a yellow line. The aperture is one-half the length of the shell. 

 The operculum has its polar point close to the lower margin. 



Melania albescens. M, testd striatd, elevato-conicd, subtenui, 

 albidd, lineis rufis interruptis ornatd; spird acvminatd ; suturis 

 impressis; anfractihus undecim, planiusculis , lineis transversis 

 vix impressis ; apcrturd ovato-ohlongd, intus albidd, rufo-macu-. 

 lata, ad basim rotunda ; columella incurvd. 

 Hah. Small streams, isles of Guimaras, Negros and Siquijor, Phi- 

 hppines. 



Length 2*5, diam. '9 of an inch. 



Remarks. — This is a very regularly formed and graceful species, 

 with rather a high and tapering spire. The impressed revolving 

 striae are chiefly on the body whorl. The most striking character- 

 istic is the numerous interrupted delicate brown Imes, which cover 

 nearly the whole of the whorls and are closer and better defined 

 towards the apex. In some specimens there are beautiful brown 

 spots on a white ground, below the sutures. The aperture is about 

 one-third the length of the shell. The operculum has its polar point 

 close to the lower margin on the left. There is a very great differ- 

 ence in the size and thickness of the specimens. Some of the old 

 are very large, heavy, and covered with the oxide of iron, showing 



5* 



