ATTSTKALIAN LAND SHELLS. 87 



flatly convex exteriorly ; aperture lunately-ovate, pearly within ; 

 peristome thin, columeliar margin very thin, flat, keeled without. 



Diameter, greatest - 80 ; least OoO ; height - 26 ; aperture m 55 long ; 042 

 wide, of an inch. 



Habitat. Mitchell Eiver. Porter. TJrara Eiver, New South Wales. 

 MacGillivray. 



This species is large and very much depressed. It is easily dis- 

 tinguished by the flatness of the base of the shell along the inner 

 lip. The animal when disturbed exudes a secretion of a purple 

 colour. Young shells show great tumidity of the body whorl. 



211. Vitrina megastoma. Cox. Plate XIV. Fig. 13, 13 a. 



Shell depressed, of a longish auriform, smooth, very thin, transparent, 

 greenish, shining, ver}' faintly striated ; spire not prominent ; whorls 

 3, slightly convex, last, depressed above, rounded at the periphery 

 and below ; aperture very large, oblique, lunately-ovate ; peristome 

 regular, right margin rather straight, then arched in front, and after 

 this less curved to the middle of the columella where it becomes 

 arched ; left margin and base of the shell membranous, flattened. 



Diameter, greatest 0"45 ; least 0*30; height - 10 ; aperture - 35 long ; 

 026 broad, of an inch. 



Habitat. Clarence Eiver. MacGillivray. 



An elongated bright greenish-yellow hyaline shell, remarkable for the 

 narrowness of the last whorl below, and the lai'ge size of the aper- 

 ture. To a certain extent it exhibits a transition to the Section 

 Peltella, represented by the next species, V. Australis. 



213. Vitrina Australis. Pfr. M. Plate XIV. Fig. 10, 



copied from Reeve. 

 Reeve, Cone. Icon. sp. 70. 



Shell very depressly ear-shaped, open at the base, yellowish-horny ; 

 spire small, rather immersed ; whorls impressed at the sutures, 

 faintly arcuately plicately striated, membranous at the edge. 



Habitat. Eastern Australia. Reeve. 



The above has been taken from Eeeve. 



This species is an example of a Section Peltella, which differs from 

 others of the genus in having only a portion of the whorls formed ; the 

 base of the shell next the animal is open or too membranous to be 

 preserved. 



Genus 



SUCCINEA. Draparnaud. 



Shell imperforate, thin, ovate or oblong ; spire very 

 small ; aperture large, obliquely oval ; columella simple, 

 acute, straight ; peristome simple, acute, straight. 



Animal amphibious, large, heliciform ; tentacles short 



