FRESH WATER AND LAND SHELLS. 301 



Remarks. — This is a very distinct species, with a not uncommon form. The green 

 colour is unusual. On the upper part of the whorl, and on the line of the suture there is a 

 light or brownish band. The body whorl is rather suddenly enlarged in the middle, which 

 gives it a slight gibbous appearance, and it is irregularly transversely striate. The apex 

 of each of the three specimens under my examination being eroded, the number of whorls 

 cannot be exactly ascertained, but I think there must be about six. The aperture is quite 

 one-half the length of the shell. It is allied to M. sordida, (Nobis,) in outline, but may 

 easily be distinguished in colour and the gibbous swelling on the whorls. I name this 

 after Mr. Safford, to whose kindness I owe this and some other fine specimens from 

 Tennessee. 



Melania pinguis. PI. XXX. Fig. 11. 



Testa I.Tvi, in/laid, subrotundd, percrassd, tenebroso-fusca; spird obtuso-conoided ; suluris impressis; 

 anfractibus convexiusculus } apertura magna, rotundatd, intus vel alba vel purpurea ; columella incurvA, 

 incrassatd. 



Shell smooth, inflated, almost round, very thick, dark-brown; spire very obtusely conical; sutures impressed; 

 whorls a little convex; aperture very large and rounded, within either white or purple; columella incurved and 

 thickened. 



Ilab. Lebanon, Wilson county, Tenn., Mr. J. M. Safford. 

 My cabinet and cabinet of Mr. Safford. 

 Diam. .34, Length .53 of an inch. 



Remarks. — I have three specimens before me from Mr. Safford; two of them are pur- 

 ple within and one white. None of them are perfect on the apex, but I presume that the 

 number of whorls must be five. One of the specimens has four. In outline it is very 

 much like M. inflata, (Nobis,) but it differs totally in the form of the columella. In that 

 species the columella is twisted backwards, and makes an angular oblique channel — in 

 the pinguis it is regularly curved, with scarcely a perceptible indentation in the place of 

 a channel. The aperture is fully one-half the length of the shell. 



Melania gibbosa. PI. XXX. Fig. 12. 



Testd Isevi, parva, obtuso-conoided, gibbosa, subfusiformi, subtenui, virido-corned ; spird obtusd; suturh 

 ularitt r impressis; anfractibus quinqut , subconvexd ; apertura magna, ellipticd, intus bivittatd; columella 

 rubiginosd, incrassatd, planulatd, impressd el valde curvatd. 



Shell smooth, small, obtusely conical, gibbous, subfusifonn, rather thin, greenish bom-colour; spire obtuse, 

 sutures irregularly impressed; whorls five, somewhat convex; aperture large, elliptical, within double banded; 

 columella rubiginose, thickened, flattened, impressed and much curved. 



Ilab. Scioto river, Ohio, Mr. C. M. Wheatlcy. 



My cabinet and cabinet of Mr. Wheatley. 

 D,am - -25, Length .43, of an inch. 



Remarks. — This is a small, very remarkable species. There is a slight depression 

 above tin: middle of the whorl, which gives it a somewhat gibbous form. The most un- 

 usual character pertaining to this species is, however, the very Hat and impressed columella, 



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