FRESH WATER AND LAM) SHELLS. 83 



anterior cicatrices confluent ; posterior cicatrices confluent; dorsal cicatrices placed nearly 

 in the centre ot* the cavity of the beaks; cavity of the shell very shallow; cavity of the 

 beaks rather shallow and annular: nacre bluish-white and iridescent. 



Remarks. — A single specimen of this shell was sent to me many years since, by Dr. 

 Edgar, with many other species. As it was. however, evidently not a mature shell, I 

 hesitated about describing it, although I was well convinced of its being new. Two spe- 

 cimens submitted to me by Dr. Budd, proved to be unquestionably the same, and one, 

 which seems to be mature, has answered for this description. They are no doubt from 

 that part of North Carolina where the streams Bow into the Tennessee River. 



This species is a very small one, and is allied to M. deltoidea, Nobis, but it is a thinner, 

 lighter shell, and smaller. Two of the specimens before me have the posterior portion of 

 the shell greenish, which colour is caused by minute, indistinct rays, which can be distin- 

 guished by close examination. 



Melania solida. PI. IX. Fig. 27. 



Testa Item, obtuso-conicd, crassd, solida, tenebroso-corned ; spira subbrevi; suturia valde impressis; anfrac- 

 tibus convexis; aperlurn parvd, rhomboided, </</ basim conlorta, inius albd; columella inflect d. 



Shell smooth, obtusely conical, thick, solid, dark horn-colour; spire rather short; sutures much impressed; 

 whorls convex: aperture small, rhomboidal, twisted at the base, white within; columella inflected. 



llab. Tennessee. E. Foreman, M. D. 



My cabinet and cabinet of Dr. Foreman. 

 Diam. .."), Length .9 of an inch. 



Remarks. — This species in form somewhat resembles .1/. alveare, Con., on one side, and 

 M. canaliculata, Say, on the other. It has not, however, cither furrows or tubercles. 

 The three specimens before me have all mutilated apices, and therefore the number of 

 whorls cannot be correctly ascertained. There may be seven or eight. The aperture is 

 about one-third the length of the shell. There is no appearance of bands in these. This 

 i- "iii of those species which have a twisted aperture, being auger-shaped, the outer lip 

 being spread out. and the edge having a hue of double curvature. The columella is very 

 much twisted. 



Melania Proteus. PI. IX. Fig. 28. 



'/'< ' i latvi, libcylindraced, Crassri, pup-.i fnruit , /I'/rn-riirm it : spirit tlrriitn: si'tnri\ 'impi-is : : ,/,//', in tilms 



1°, ; npi rlnrit jinrvit, rlinuthniih it , ml Imsini angulatd, inll'f tilliidit. 

 Shell smooth, subcylindrical, thick, pupaform, yellowish horn-colour; spire elevated; sutures impressed; aper- 

 ture sm ill, rhomboidal) angular at the base, within whitish. 



Ifab. Tuscaloosa. Alabama. 15. W. Budd, M. D. 



M\ cabinet and cabinet oI'Dr. Budd. 

 I > i ; i iii. .5, Length 1 inch. 



Remarks. — There were six specimens submitted to me by Dr. Budd. which I refer to 

 the one species, although the) present considerable difference. Five of the specimens are 

 dead and bleached shells, and are of a light yellow or buff colour. The sixth is a fresh 



