ODOSTOMIA. 259 



of them at their lower suture. The base of the shell is 

 well rounded, but rather short, and neither compressed 

 anteriorly nor angulated at the circumference; it does not 

 appear to be encircled with any spiral sculpture. The 

 aperture, which occupies about a fourth of the entire 

 length of the shell, and at least half the basal diameter, 

 is almost simply ovate, yet a little contracted posteriorly ; 

 its peristome is nearly continuous ; both its lips are acute, 

 simple, and arcuated ; the pillar lip, v/hich is very thin, 

 erect, and not reflected, except a little so in front, inclines 

 rather away from the outer lip, and discloses a well- 

 marked umbilical chink or perforation behind it. The 

 length of the example rather exceeds the sixth, and its 

 breadth the twentieth, of an inch. 



It was discovered at Birterbuy I3ay, on the west coast of 

 Ireland, by Mr. Barlee.* 



ODOSTOMIA. Fleming. 



Shell turreted, subulate or ovate ; surface smooth (more 

 rarely spirally striated, or with longitudinal ribs). Apex 

 of the spire sinistral. Aperture ovate, or subquadrate, 

 columella lip rarely straight, usually with a tooth-like fold. 

 Operculum ovate-acute, subspiral, corneous, transversely 

 striated, placed on a simple lobe. 



* The Pymmis lacteus of Brown (lUust. Conch. G. B. p. 15, pi. 9, f. 58) 

 probably belongs to this genus, and has been cited with doubt by Mr. Jelfreys 

 as a variety of elegantissima. It was found by the author on Belton sands, near 

 Dunbar ; rather a suspicious locality for an indigenous species. 



" White, subfusiform, consisting of ten abruptly tapering volutions, terminating 

 in an acute apex, and well defined by the line of the suture ; body ventricose, 

 nearly equal to the length of the spire ; the whole shell furnished with numerous 

 depressed, not very distinct, longitudinal ribs ; aperture subrotund ; outer-lip thin, 

 produced; pillar-lip very slightly reflected on the columella. Length an eighth of 

 an inch ; breadth not quite half its length." 



