292 LAND AND FRESHWATER 



" Second specimen. — Size : maj. diara. 18*0, niin. 13'75 ; alt. axis 

 6'8 mm. 



" Animal not seen. It would be an interesting species to obtain 

 alive. 



" This is one of those forms which, without an examination of 

 the animal, it is quite impossible to assign to its true generic or 

 subgeneric position." The great number of teeth in the radula 

 shows it is not an Aitstenia. 



Subfamily Durgellin.e. 



Genus Durgella. 



(Continued from A^ol. II. p. 205, 1907.) 



Durgella edeana, n. sp. (Plate CXXIII. fig. 12, type (shell) ; 

 riate CXXIX. figs. 2, 2 a.) 



Locality. Silchar, Cachar {F. Edc). 



Shell very thin and membranaceous, so much so that on drying 

 up, its form was much destroyed and the surface became wrinkled. 

 It consists of 3 wliorls, the last large and rapidly increasing. 

 Colour a dark olive-brown. 



Animal. Foot smooth on sides, peripodial grooves close together. 

 Sole of foot narrow, divided. Foot long behind, truncate, with a 

 lobe above the mucous gland. 



The jaw (fig. 2) is straight on the cuttiug-edge, narrow, thin, 

 with slight trace of an arched upper margin. 



The radula (fig. 2 a) consists of a multitude of very similar 

 teeth on narrow plates, with a serrated edge. The central tooth 

 is small, unicuspid, the first three or four marginals are slightly 

 broader than those that follow. 



Only one specimen was obtained, and that by Mr. Ede, after 

 whom I have the pleasure of naming it. 



Durgella? erratica, G.-A. (Plate CXXXI. figs. 2, 2a.) 



(lAustenia) G.-A. P. Z. S. 1888, p. 241. 



Naniim Jevicula, Blf. J. A. S. B. 1865, pt. 2, p. 87 : Nevill, 

 Hand-1. i. p. 26, no. 56, 16 Bassein {W. T. Blanford); nee Bs. 

 Durgella erratica, Paun. Brit. lud., Moll. (lt)08) p. 216. 



Localities. Pingoung, Shan Hills, Burma, type (S2iratt.) : Bassein 

 district, Pegu (ir. T. ^.). 



Description by Dr. W. T. Blanford: — 



" Shell openly perforate, globosely depressed, thin, translucent, 

 smooth, slightly polished, pale amber or brownish ; spire nearly 

 flat, slightly convex, suture shallow ; whorls 3^-4, rapidly in- 

 creasing, flatly convex above, the last much larger, scarcely 



