Mr. G. Kreflft on Furina textilis. 393 



margin rounded. Anterior extremity rounded, as well as posterior, 

 both being of nearly equal size. Ribs of carapace numerous, narrow, 

 and finely punctate in the interstices. 



In general outline this species resembles very much E. dahala- 

 censis ; but the ribs are narrower, more numerous, and the surface of 

 the interstices is much more finely punctate. 



Length of carapace, about 5 lines ; breadth at umbo, 3 lines. 



Hab, Brackish lake. Green Point, Cape of Good Hope (/. 

 Macgillivray). (Miis, Brit.) 



6. EsTHERiA Caldwelli, Balrd. 



Carapace-valves swollen, ovate, of a pale horn-colour. Umbones 

 large, prominent, and ferruginous-coloured, placed at about one-third 

 distance from the anterior extremity. Dorsal margin short, and nearly 

 straight. Anterior extremity rounded, short, a little broader than 

 posterior extremity, which is long and rounded. Ventral margin 

 rounded. Ribs of carapace numerous, rather narrow. Interstices 

 roughly and strongly punctate. 



Length of carapace, nearly 4 lines ; breadth at umbo, rather more 

 than 2 lines. 



Hab, Lake Winnipeg, N. America {W. Caldwell, Esq.). (Mus. 

 Brit.) 



7. LiMNETis GouLDii, Baird. 



Carapace nearly quite globular, ventricose, and of a light horn- 

 colour. Surface of valves smooth, not ribbed, and covered entirely 

 with numerous very small hollow punctations exactly resembling 

 those on the top of a thimble. The point to which the adductor 

 muscles are attached is very marked, being slightly prominent and 

 very smooth and shining ; and the branchial canals on the surface 

 of the valves are strongly exhibited. 



This species resembles very much L. Wahlbergii of Loven, from 

 Port Natal. In addition, however, to the total difference of habitat, 

 this species differs from the one described by Loven in size, being 

 double the dimensions of it. The animal, too, differs in some par- 

 ticulars ; but as all the specimens I have examined are Qjales, and 

 the one figured by Loven is a female, I do not know how far these 

 differences may be merely sexual. 



Diameter of carapace, about \\ line. 



Hab. Fresh water at St. Ann's, twenty miles from Montreal, 

 Canada. Collected by Charles Gould, Esq., June 1857. {Mus, 

 Brit.) 



Note on Furina textilis. By Gerard Krefft, Acting 

 Curator Austr, Mus. 



During my rambles in the neighbourhood of Sydney I have found 

 a number of small Snakes, varying in length from 8 to 12", and an- 

 swering to the description given by Dumeril and Bibron of Furina 

 textilis. None of the specimens obtained have exceeded 1 G" in length ; 

 and 1 have been naturally anxious to procure the young of this spe- 



