BY W. F. PETTERD. 75 



Beddomeia Tasmanica. TenisoU' Woods. 

 Plate I. Fig. 11. 



Valvafa Tusmanica. Tenisou-Woods. Pro. Eoyal Soc. Tas., 



1876. 

 I find upon examination that this interesting little species 

 has not the true muUi-sjnral operculum ■which constitutes 

 the most important character of the genus Valvata ; in this 

 shell it is^cn<cisy9n"«/ and it is therefore necessary to place 

 it in another genus. Its only known habitat is a small stream 

 in Gould's Country. 



Beddomeia Bellii. n. sp. 

 Plate I. Fig. 7. 



Shell small, thin, globosely conical, brown, rather dull. 

 Spire small, apex obtuse. Whorls 4^, very convex, suture 

 impressed, marked with lines of growth. Body-wh'^rl large, 

 inflated with a peculiar open excavated and sharply margined 

 false umbilicus. Aperture ovately expanded almost semi- 

 lunar, peritremo continuous, almost straight, thickened and 

 reflexed at the columellar margin, expanded but not reflexed 

 on the labral edge. Operculum, thin, dark horny, paucispiral. 

 Length, o\ ; breadth, 3 mill. 



Habitat. — Small stream near the Heazlewood River. 

 Castray and Waratah rivers. 



The unic|ue character of the umbilical opening separates 

 this well-marked species from the many other small forms 

 that inhabit our streams. In shape it is not unlike B. ILulli, 

 but its colour, combined with the umbilical opening at once 

 separates it. It is named after Mr. W. G. Bell, one of the 

 pioneer prospectors of the western portion of the island, who 

 moreover, takes a very great interest in all scientific matters. 



Beddomeia Lodder-e. n. sp. 

 Plate III. Fig. 1. 



Shell, small, globosely conical, thin, brownish horn, covered 

 with a very thin epidermis. Whorls, 4^, flatly convex, the 

 penultimate large, inflated. Spire, somewhat small, acute. 

 Aperture, large, broadly ovate ; peristome, thin, acute, 

 columellar margin rather thickened, depressed and united to 

 the termination of labrum with a very thin, shining callus 

 deposit. Opercidum, hoi-ny, jiaucisjural. 



Length, 4 ; brcaJth, 3 mill. 



Ilnhital — Creek, upper Castra, Kiver Leven (Miss Loddor), 

 Deep Creek, near the Duck River, North-west Coast (Rev. Mr. 

 Hull). 



