GONIOBASIS. 139 



SPECIES. 



A. Shell spirally ridged. 

 1. G. procissa, Axthoxy. 



Melanin prodssa, AXTnoxY, Ann. Lye. Nat. Hist. N. Y., vi, p. 109, t. 3, f. 9, March, 



1854. BixNEV, Check List, No. 218. BuoT.List, p. 59. Reeve, Mouog. Mehinia, 



sp. 312. 



Description.—SheM ovate, rather thick, browu ; -svhorls supposed to 



be about live, rather convex; body-whorl surrounded by about five 



carintr, of which two ceutral ones are more prominent; sutures 



linear; aperture large, ovate, exhibiting the elevated ridges 



Fi 

 on the body-whorl, as linear, brown bands seen through the 



substance of the shell; columella rounded, deeply indented, 



having a small purple spot below the middle, with a slight 



sinus at the base. 



Diameter, -35 inch (9 anillim.) ; length, -50 inch (14 millim.). 

 Length of aperture, -28 inch (7 millim.) ; breadth of aperture, '18 

 inch (ih millim.). 



Habitat. — Alabama. 



Observations. — The only specimen I have is somewhat mutilated, 

 but seems nevertheless perfectly distinct ; the only known species 

 with which I can compare it is 31. sulcosa, Lea, which is a much 

 thinner and more elevated species. The aperture of the present shell 

 is also proportionally much larger, and the number of whorls less, 

 for, though injured iu that part, the rapid diminution of the whorls 

 does not indicate an elevated spire; tlie number of raised lines on 

 the body-whorl is also less, and they are rather very elevated costie 

 than strice as iu Mr. Lea's species. — Anthony. 



This species, at first sight very distinct, may be only a 

 lengthened variety of Mr. Anthony's Ancidosa canalifera ; and 

 the latter is perhaps a variety of A. cco'inata, Bruguiere 

 (dissimilis, Say). The locality given is probably incorrect, as 

 the shell has the aspect of tlie North Carolina Strepomatidoi 

 rather than those of Alabama. 



