NEW MELANIDiE OF THE UNITED STATES. 243 



with Mekmia (Goniobasis) corneola, Anth., although of the same size and color, that 

 shell being fusiform, with a conical spire and an aperture only half the length of 

 the shell. 



Goniobasis Lewisii. PI. 35, fig. 46. 



Testa striata, subcylindracea, tenebroso-virente, valde vittata ; spira subelevata, conoidea ; suturis valde 

 impressis ; anfractibus planulatis, sulcatis, instar senis; apertura parviuscula, ovata-rbomboidea, 

 intus valde vittata, ad basiru obtuse angulata ; labro acuto ; columella alba et incurvata. 



Shell striate, somewhat cylindrical, dark green, much banded ; spire somewhat 

 raised, conical ; sutures much impressed ; whorls flattened, sulcate, about six ; aper- 

 ture rather small, ovately rhomboidal, much banded within, obtusely angular at the 

 base ; outer lip acute ; columella white and incurved. 



Operculum ovate, spiral, nearly black, with the polar point near the inner edge 

 and close to the base. 



Melania Lewisii, Proe. Acad. Nat. Sei., 1861, p. 118. 



Hah. — Coosa and Talapoosa Kivers, Alabama, E. R. Showalter, M. D. 



My cabinet and cabinets of Dr. Showalter and Dr. Lewis. 

 Diam. -44, Length -94 inch. 



Remarks. — Several specimens were sent to me by Dr. Lewis and by Dr. Showalter. 

 It is a well marked species, and has somewhat the appearance of a Schizostoma, but 

 there is no fissure. The shoulder below the suture is well marked and like Schizos- 

 toma, and the suture so wide and deep as to make quite a furrow. There is a dispo- 

 sition to have five to eight coarse rounded strise, with sulcations between, but some 

 specimens are nearly smooth. These coarse strise are cord-like and usually dark 

 colored. The dark brown bands are well defined within, and in each of the eight 

 specimens before me, there are four. On the upper part of the whorls the bands are 

 interrupted with yellowish spots. The aperture is more than one-third the length 

 of the shell. I have great pleasure in dedicating this interesting species to my 

 friend James Lewis, M. D., of Mohawk, N. Y., who has done so much to develope 

 the history of our fresh-water Molluscs. 



Goniobasis pergrata. PI. 35, fig. 47. 



Testa striata, subiusifornii, obtuse conica, crassiuscula, viridi-cornea ; spira, valde obtusa ; suturis valde 

 impressis ; anfractibus senis, superue humerosis, striis transversis crebre indutis, ultimo pergrandi 

 et cylindraceo ; apertura grandi, elongato-ovata, intus-albida ; labro acuto ; columella arcuata, su- 

 perne paulisper callosa, ad basim subrotundatSL 



Shell striate, subcylindrical, obtusely conical, somewhat thick, greenish horn-color ; 

 spire very obtuse ; sutures very much impressed ; whorls six, shouldered above, 

 covered with transverse striae, the last very large and cylindrical ; aperture large, 

 elongately ovate, whitish within ; outer lip acute ; columella arcuate, slightly 

 callous above, somewhat rounded at the base. 



