121 



Spondylus pseudoradula, McCoy. 



Reference. — Prodroinus Pal. Victoria, Decade v., pi. 45, fig. 2 

 <1877). 



Localities. — Victoria: clays near Mount Martlia in Port 

 Phillip Bay ; claybeds of Muddy Creek; at Fyansford, Bairns- 

 dale, and Mordialloc {McCoy). 



South Australia: common in the calciferous sandstones o£ 

 the Kiver Murray Cliffs [B.T.). 



Spondylus gaederopoides, McCoy. 



Beference. — Prodromus Pal. Victoria, Decade iv., pi. 38 (1876); 

 Dec. v., pi. 45, figs. 1 and 3. 



Localities. — Victoria : sandy strata of Bird E,ock Bluff, near 

 G-eelong ; in the cream-colored limestone of Boggy Creek, six 

 miles from Sale, Gippsland {ILcCoy). 



South Australia : glauconitic limestone and Turritella lime- 

 stone bands at Blanche Point, Aldinga Bay ; in the glauconitic 

 clayey sands, xldelaide bore ; in the chalk rock of the Bunda 

 Cli'ffs, Great Australian Bight {R.T.). 



FAMILY AVICULID^. 

 Avicula nasuta, spec. nov. PI. xi., fig. llj pi. xii., fig. 12. 



The aviculid represented on pi. xi., fig. 11, is the best of tlie 

 few specimens that have come under my observation ; it is not 

 only imperfect, but has lost its external shell layer, and a 

 complete diagnosis of the characters is not possible. The 

 figured specimen is a right valve, incorrectly showu as a left 

 Talve. However, a fragment illustrated by fig. 12, pi. xii., is 

 complete so far as regards the umbo and anterior wing, the 

 disproportionate length of the latter part in conjunction with 

 the shape of the valve seem to afford specific characters. 



dimensions. — Length, about 40 ; width, about 20 millimetres. 



Locality. — Adelaide bore, in brown clayey sand with glauco- 

 nitic grains. 



Meleagrina crassicardia, spec. nov. PI. is., figs. 9 and 10. 

 Shell slightly oblique, roundly quadrate, inequivalve, very 

 inequilateral, left valve moderately tumid, right valve flatter. 

 Hinge-line long, straight, with a distinct cardinal tooth in the 

 young shell ; the ligamental area very broad, and flattened 

 externally, cardinal tooth obsolete in the adult. Anterior 

 auricle of the left valve short, tumid, and acutely pointed, 

 that of the right valve depressed, slightly emarginated below 

 at the narrow byssal fissure ; posterior wing small but dis- 

 tinctly developed, acutely pointed. The surface shows indis- 

 tinct, distant striae of growth, but to the unaided eye appears 

 smooth. 



