92 TRACHELIPODA. 



ture irregular, semi-ovate, rounded, and subangulated beneath ; 

 margins of outer lip nearly equal, and reflected outwardly, un- 

 connected at their upper parts ; the plait of the columella inter- 

 posed between them. 



Pupa muscorum. — The Moss Pupa. Plate XIII. fig. 21. 

 Very small, cylindrical, obtuse, and smooth, brownish horn- 

 coloured ; volutions convex ; sutures much sunk; aperture with 

 one tooth ; outer lip white and reflected. One-eighth of an inch 

 long. Inhabits moss, generally in shaded places of Europe. 



Genus 78.— HE LI C IN A Lamarck, 



Generic Character. — Shell sub-globose, imperforate ; aperture 

 entire, and semi-oval ; columella callous, transverse, and flat ; 

 margins of outer lip acute, and forming an angle at the base of 

 the right margin ; with a horny operculum. 



The shells of this genus are distinguished from the Helices, by their trans- 

 verse callous columella, depressed and diminished in thickness at the lower 

 part. 



Helicina major. — The Great Helicina. Plate XIII. fig. 

 22. Citron coloured, inside pink ; pillar and outer lip white ; 

 the former broadly reflected on the columella. 



Genus 79.— ANA STOMA.— Za/narcA. 



Generic Character. — Shell suborbicular ; spire convex and 

 obtuse ; aperture rounded, dentated within, turned upwards and 

 grinning ; margin of the outer lip reflected. 



Anastoma Globulosa.— The Globular Anastoma. Plate 

 XIII. fig. 25. Suborbicular, obsoletely carinated, smooth, and 

 white ; aperture with six teeth ; reddish-brown. 



Genus 80.— CARO COLL A.— Lamarck. 



Generic Character. — Shell orbicular, more or less convex or 

 conoid above, with the circumference acutely angulated ; aper- 

 ture transverse, contiguous to the axis of the shell ; outer lip 

 subangular, frequently dentated below. 



CarocoUa lapicida. — The Stone Carocolla. Plate XIII. 

 fig. 26. Depressed above, and convex beneath, broadly umbili- 

 cated, and transversely striated ; reddish horn-coloured ; body 



