82 



PisiDiUM DULVERTOXENSis, n.s., P. ovcita, tenuis, vcntricnm, rufo- 

 fulva, nitkla, regulariter concentricc striata ; ineqnilateralis, latere 

 antico producto, subangulato; postice obtuse rottindato et suhangidato ; 

 umhonihns prominentitms. 



Shell ovate, thin, ventricose, fulvous-red, shining, resularly 

 concentrically striate, inequilateral, anterior side produced, 

 subangulate, posterior obtusely i-ounded and subangulate, um- 

 bones prominent. Length 7 ; breadth 5^ ; height, 3 J- mill. 



This remarkable species is much larger and different in 

 color from the preceding. It is more angular in outline and 

 more oblong. Like all the species from Lake Dulverton it i& 

 quite restricted in its habitat. 



CYCLAS. Kleix. (pars). 1753. 



Testa ut supra (vide descripA. Pisid. generis) ligamentum tamen 

 latere majore insertum. 



Shell as above in Pisidium, but the ligament is inserted in 

 the longer side. 



Cyclas TASM.iNiCA, 71. s. C. testa suhquadrata, ventricosa, tenui^ 

 nitida,, cariieo-lutea, intus alba ; eleganter striata ; sulcis 3 vel If 

 transversis, subcoloratis ; iimbmiibus prmninentib^is sub-obliquis. 



Shell subquadrate, ventricose, thin, shining, fleshy yellow, 

 white inside, elegantly striate, with 3 or 4 silver-like bands of 

 colour which are lines of growth. Umbones prominent, sub- 

 oblique. Length 9. Breadth 7h Height 5 mill. 



Habitat, east coast, near Swansea. A very remarkable but 

 somewhat small Cyclas, the only one known in Tasmania. 



