302 ME. E. A. SMITH ON THE 



simple tooth, oa the right of one pit, and a more oblique and 

 thinner one to the left of the other, almost joining the posterior 

 lateral tootli ; the latter is about equal in length to the anterior 

 one, both being finely serrated at the edge and striated on both 

 sides. The left valve has a large triangular deep central pit, with 

 a prominent tooth on each side of it, somewhat grooved or double 

 at their apices, these again having a pit on their outsides, that on 

 the posterior side being narrow and very oblique. Lateral teeth 

 double, separated by a groove for the reception of the simple 

 teeth of the opposing valve. 



Largest specimen 20 millim. in width, 15^ long, 11 in thick- 

 ness. An average example is 15 millim. wide, 12 long, 7 in 

 thickness. 



125. CoEBiCTJLA. MiisroE, Prime. 



Corbicula minor, Prime, Proc. Acad. Nat. Sci. Philad. 1861, p. 127; 



Cat. CorbiculadcB, 1863, p. 4 ; Annals Lye. Nat. Hist. N. York, 



vol. viii. p. 80, fig. 29; Cat. Corb., Amer. J. Conch, v. p. 133, no. 63; 



Clessin, Kuster's Con.- Cab. p. 176, pi. 30. fig. 24. 



Sab. New Holland (Prime); Eichmond Eiver and Burnett 



Biver (Brazier). 



126. Corbicula Anqasi, Prime. 



Corbicula Angasi, Prime, Journ. de Conch. 1864, vol. xii. p. 151, pi. vii. 

 tig. 6 ; Cat. Corb., Americ. J. Conch, v. p. 128. no. 6 ; Clessin in 

 Kuster's Con.-Cab. p. 205, pi. xxxviii. fig- 3; Sowerby, Con. Icon. 

 Cyrena, fig. 90 (coarse) ! 



Corbicula rivina, Clessin, Con.-Cab. ed. 2, p. 139, pi. xxv. figs. 3,4. 



Hah. Murray Eiver, S. Australia (^»y«5); Eiver Onkaparinga, 

 at Noarlunga {MoUneux). 



Mr. Angas has liberally placed a series of this species in the 

 Britisb Museum. On removing the rust-red earthy deposit which 

 covers them, the epidermis is of a straw-colour. The interior of 

 the valves varies considerably in painting. Prime describes it as 

 pale orange, and sometimes whitish ; but three specimens which 

 I have opened are of a pinkisb tint, two of them being much 

 stained with deep purple. The latter colour takes the form of a 

 somewhat triangular spot situated in tbe deepest part or bottom 

 of tbe valve, besides which there is a broad concentric band across 

 the middle of the valves. 



The specimens described by Clessin under the name of G. rivina 

 were also collected by Angas in the Murray Eiver. 



