130 Binney on Terrestrial MoUusks. 



viMtrk'osus, 5-7 long, testae aequans ; apertura ovata ; perist. simplex, 

 intus incrassatum, marginibus callo albo, crasso, junctis, toluuiellari re- 

 flexo, iinibilicum subtegente. 



SYNONYMS AND KEFERENCES. 



Bulimtis pntiiarclia \V. G. Rixnky, Proc. Pliihi. Acad. Nat. Sc. 1858,116; Notes, 

 p. 17. 



DESCIUPTION. 



Animal not observed. 



Shell perforate, ovate, heavy, white, and wrinkled ; 

 whorls 6, convex, the last ventricose, equalling in length 

 5-7 of the shell ; aperture ovate ; peristome simple, thick- 

 ened within, the extremities joined by a heavy white 

 callus, the columellar extremity slightly reflected, so as 

 partially to conceal the umbilicus. 



Length 35, diam. 19 ; aperture, length 19, diam. 12 mill- 

 imetres. 



Geograpliical Distribution. Texas and Mexico, at Buena 

 Vista, (Berlandiere). 



Remarks. Belongs to the same group as But. dealbatus 

 Say, alter natus Say, liqualis Reeve, Schiedeanus Pf., &:c. 

 The characteristics which form its specific differences are 

 alike present in young and old specimens, and constant 

 in all from the locality. I therefore consider it as well 

 entitled to specific distinction as those named. 



Named from its greater size and more antiquated ap- 

 pearance, as compared with the allied species. 



BULIMUS DK A LBATUS Say . .vol. ii. p. 276, pi. li. fig. 1 ; pi. Ixxx. figs. 6, 7. 



Htlix dealbata Say, (Biiiiity's ed.) p. 20. 

 DeKay, N. Y. Moll. p. 46. 

 Bulimus dealbatus C'iikjimtz, ed. 2. p. .55. 

 I'lEii iKit, 1. c. iii. 418. 

 Bulimus conJinU Reeve, Con. Icon. No. 643, (1850). 



Pkeiifkk, 1. c. iii. 341. 

 Bulimus liquabilis Kekvk, 1. c. -SS". 



On plate 51, fig. 1, will be found a correct representa- 



