786 GASTROPODA. [Pulmonata. 



the adult volution somewhat irregularly and rather distantly spirally 

 grooved, the grooves crossed by coarse irregular and arcuate growth- 

 wrinkles. Colour, without, glossy chestnut shaded to greenish-yellow 

 at the margin, spire tinged with reddish-brown ; within, nacreous, 

 gleaming white and purple, columellar lip white. Epidermis thin, 

 polished. Spire quite flat. Protoconch of 1 J rapidly increasing whorls, 

 flatly convex, one-seventh of the total length, regular, well defined. 

 Whorls 2, the adult half most rapidly increasing, finger-nail-shaped, 

 descending at the suture. Suture deep. Peristome thin and sharp, 

 the upper lip very little curved. The outer lip regularly rounded ; basal 

 lip nearly straight. Columella very short, subvertical. Inner li/i 

 thickly callous, terminating below in 1 or several minute tubercles, and 

 spreading broadly above over the parietal wall. The inside of the 

 aperture is strongly callous in the centre and towards the columella, 

 where there is a well-impressed muscular scar of the columellar muscle ; a 

 second elongated muscle-scar is situate on the inner side of the basal lip. 



Diameter, 7 mm. ; length, 10 mm. ; height, 2-5 mm. (type). 

 Diameter, 19-5 mm. ; length. 32-5 mm. ; height, 6 mm. (very large 

 specimen). 



Animal, contracted in alcohol, is in length 20 mm. ; in height and 

 breadth, 9 mm. (the shell the size of the type). Behind the shell, 

 situated upon the hinder half of the body, the tail slightly projects ; 

 it is flat, without a trace of a mucous gland, and bluntly pointed. 

 The margin of the foot is produced into a slight flange. A pair of 

 grooves running along the median line from the mantle to the muzzle 

 define a row of small tubercles. Eight and left, between this median 

 line and the foot-edge, there may be traced 2 indistinct grooves pro- 

 ceeding from the mantle to the lips. Posterior to these the surface is 

 divided into tubercles by small irregular grooves meandering outwards 

 and downwards. The mantle has an even margin, with 2 small lappets 

 on the under-side ; the right proceeds forward from a little behind 

 the respiratory pore, extends to almost one-third of the length of the 

 mantle-margin, and forms a narrow fold ; the left is minute, simply a 

 rudiment, and in some specimens difficult to detect. Sole without 

 a defined median area. Two small labial tentacles are present. 

 Colour reddish-brown, splashed with black, darkest above ; mantle 

 and sole ashy-yellow. 



Anatomy. Hedley, P.L.S. N.S.W. (2), vii, 387, pi. 9, 10 : Collinge. 

 A.M.N.H. (7), vii, 71, pi. 2. f. 26-30 : Murdoch, P. Mai. S., i, 138 ; 

 iv, 169, pi. 17, f. 8-10. 



Radula having the formula 26 + + 26 x 61, the number of teeth 

 varying from 25 to 28, with here and there a rudimentary tooth in the 

 centre. The innermost four teeth are small and slender, then they 

 increase rapidly in size ; the 25th tooth is rather smaller than the 

 24th, and the 26th is minute and occasionally absent. 



The pharynx i* enormous, occupying almost the whole length of 

 the visceral cavitv. 



