170 



Lewisia Woodwardiana, Chitty. 



Hab. ? Hauover (unique). 



Form, subdiscoidal. Colour, very pale hora. Sculpture, 14 spirai 

 carinse, widely apart, rather blunt ; about 4 visible on the penult 

 whorl, lines of growth well defined. Spire, very slightly elevated, 

 with concave outliues. Whorls, 4, very slightly rounded, with a 

 lightly impressed suture ; lašt whorl well rounded. Aperture, vrell 

 detached from the body whorl, slightly depressed and shghtly con- 

 stricted, semielliptical. Lah-um, double, slightly thickened, reflected 

 and rounded off, stnooth, plain, not scolloped. Labium, straight, 

 edge produced angularly in its centre, and much rounded and re- 

 flected towards the umbilicus. Labral lamella (see ante), rises 

 somewhat abruptly from the labrum, formiug a cavity louger in its 

 interior than the aperture, and joins the lašt vrhori below, beyond 

 the umbilicus, by rather a sharp inflection upvvards ; so that from 

 its junction to outside the labium is not wider than the lesser dia- 

 meter of the aperture ; exteriorly very convex, with a deep suture 

 between it and the lašt whorl beneath. Umbilicus, concealed. Oper- 

 culum, ? 



Height 0-057, greatest breadth 0-083, least breadth 0-07. 



Named in comphment to S. P. \Voodward, Esq., British Museum, 

 author of * Maaual of Recent and Fossil Shells,' &c. 



Levtisia MacAndre-toiana, Chitty (unique). 



Hab. Near the Botame Garden, St. Andrew's. The smallest 

 Stoastoma ! 



Form, subdiscoidal. Colour, pearl white, semitransparent, most 

 likely therefore a young shell. Sculjiture, 25 equidistant fine spirai 

 carinse. Spire, much depressed, with convex outlines. JVhorls, 

 3į, well rounded, with rather a deep suture ; lašt whorl well rounded. 

 Aperture, vrell rounded, more than a semicircle, very shghtly ex- 

 panded below ; a little detached from penult whorl and very slightly 

 depressed. Labrum, slightly double, thin, reflected very shortly, 

 white, shining, smooth, planular. Labium, well detached from 

 penult whorl, rather lower than plane of labrum, very shghtly curved 

 to the right below. Umbilicus, N. B. ! apparently very shallow, but 

 covered by an externally convex white callosity, which proceeds from 

 behiud the upper end of the labium and covers the umbihcus, and 

 is attached to the body whorl all but at its extreme left ; whereunto 

 it may, in older specimens, be entirely soldered. This, though in- 

 complete at the aperture, bears the characters of a complete shell. 

 The labral lamella is very slightly produced, rounded at its edge, 

 quite separate from the above callosity on the right, but appa- 

 rently joining the exterior of it on the left, round the umbUical 

 region. 



Height 0-024, greatest breadth 0-046, least breadth 0-036. 

 I have some doubts as to placing this unique specimen in this 

 subgenus, but think that, from the callosity over the umbilicus and 

 its seeming immaturity, and the appearance that the labral lamella 



