NEW MELANID/E OF THE UNITED STATES 261 



tinted with brown. The outer lip is borderer! with white. The length of the best 

 specimen is nearly three-quarters of an inch, and the aperture is more than half the 

 length of the shell. 



LlTHASIA SUBGLOBOSA. PI. 35, fig. 70. 



Testa, tuberculata, subglobosa, crassa, luteo-cornea, bivittata ; spira vix exserta ; suturis inipressis ; anfrac- 

 tibus quinis, ultimo grandissimo, apud huineris tuberculatis ; apertura magna, rhoniboidea, intus albS,, 

 bivittata, ad basim canaliculata; columella vakle incurvata, superne et inferne valde inerassata; 

 labro expanso, margine aeuto. 



Shell tuberculate, subglobose, thick, yellowish horn-color, double-banded ; spire 

 scarcely exserted ; sutures impressed ; whorls five, the last very large, towards the 

 shoulder tuberculate ; aperture large, rhomboidal, within white and double-banded, 

 channelled at the base ; columella very much incurved, very nuch thickened above 

 and below; outer lip expanded, acute at the margin. 



Operculum rather small, very dark brown, subovate, with the polar point within 

 the lower left edge. 



Liiliasia smbglohosa , Proc. Acad. Nat. Sci.. 1861, p. 55. 



Hah. — Tennessee, Prof. G. Troost. 



My cabinet. 

 Diani. -48, Length -GO inch. 



Remarks. — Two specimens of this remarkably globose species have been in my 

 possession for a long time. I had doubts of their being only the young of Melania 

 (Lithasia) salebrosa Con., but they are so different from any young of that species which 

 I have seen that I cannot now doubt of their being entirely distinct. I know of no 

 species which has so obtuse a spire. In this it resembles Anculosa, but the well charac- 

 terized columella forbids its being at all confounded with any species of that genus. 

 The callus above and below is unusually strong, below it almost amounts to a fold. 

 One of the specimens is full grown, and has five tubercles on the shoulder of thi^ 

 outer half of the last whorl, and near the edge there are three above these five. The 

 smaller one is little more than half grown, and has not as yet formed any tubercles. 

 The two broad bands are below the row of tubercles. The last whorl is so lare;e that 

 it nearly covers all the others, leaving merely a point to mark the vertex. Tlfe two 

 bands are well pronounced interiorly as well as exteriorly. 



Lithasia fusiformis. PI.' 35, fig. 71. 



Testa sulcata, fusiformi, subteuui, rufo-fusca, quadro-vittata ; spira conoidea ; suturis irregulariter im- 

 pressis ; anfractibus senis, ultimo magno et parum inflato ; apcrtunt elongato-rliomboidea, intus 

 albida, quadro-vittata, ad basim canaliculata et recurvata ; columella sigmoide;1, superne inerassata; 

 labro subeonstricto, margine acuto. 



Shell sulcate, fusiform, rather thin, obscurely furrowed, reddish brown, four-banded, 



67 



