312 Cliapmaii and GaJn-iel : 



Distributio/i .—Bovii 6, ll-i-lSO feet. Bore 7. 142 feet 3 inclies- 

 155 feet. Bore 10. 225-2;3() feet; 310-320 feet. Bore 11. lOT-lOa- 

 feet 



Fam. DONACIDAE. 

 Genus DONAX, Linne. 



DONAX KENYONIANA,^ Sp. nov. (PI. XXVIL, FigS. 1 9rt, />, 20.-.U.1 21.) 



Description. — Shell, triangularly elongate-ovate, very ine((uila- 

 teral, the anterior extremity being much larger than the posterior; 

 depressed convex, flattened towards the ventral and anterior, and 

 with a distinct depressed area on the ventral behind the median, 

 line; ventral margin nearly straight, incurved near the keel;, 

 antero-ventral angle well rounded, posterior sub-angulate; um- 

 bonal keel elevated and sharp. Surface of shell with purple and' 

 cream colour-bands in well preserved specimens. Growth-lines 

 conspicuously marked, crossed by fine, radial striae, stronger 

 towards the posterior. Interior of shell smooth, with the commis- 

 sure raised within and flattened towards the outer margin, in clean 

 specimens closely and finely vertically striated. 



Dimensions. — Length of holotype (medium-sized example). 12 

 mm.; height, 7.75 nmi. Length of a larger specimen, paratype. 

 33.75 mm. Shell sometimes attaining a length of about 33 mm. 



Observations. — The above species differs from Donax depressa, 

 Tafce,2 a Murray cliffs fossil, in its more elongate form and striatedi 

 inner margin. In the latter character it resembles D. deltoides, 

 Lamarck, ^ a species still living on the Victorian coast, but from' 

 which it is at once separated by its greater length and thinner 

 build. 



Distribution. — Bore 7. 142 feet. 3 inches-155 feet. Bore 8. 160- 

 165 feet; 165-180 feet. Bore 10. 186-190 feet; 195-225 feet; 225- 

 230 feet; 310-320 feet. 



Fam. CORBULIDAE. 

 Genus CORBULA. Lamarck. 

 CoRBULA coxi, Pilsbry. 

 Corbula coxi. Pilsbry. 1897, Proc. Acad. Nat. Sci. Philad., 

 p. 363, pi. ix. figs. 1-3. C. scophoides, Dennant and 

 Kitson. non Hinds. 1903, Rec. Geol. Surv. Vict., vol. 

 i. pt. 2. p. 139. C. coxi, Pilsl)ry. Gatliff and Gabriel, 

 1909, Proc. Roy. Soc. Vict., vol. xxii. (N.S.) pt. i. p. 44. 



1. Named after Mr. A. S. Keiiyoii, of the State Rivers and Water Supply Coininissioii. 



2. Trans. R. Soc. S. Austr., vol. ix., 1887, p. I(i8, pi. xvi., fin. 11. 



3. Anini. sans Vert. (ed. Deshayes), \ol. vi., 1819, p. 241. I'ritchai-d and Gatliff, I'roc. K. Soc-. 

 Vict., vol. xvi. (N.S.)pt. i., 190;{, p. 118. 



