Philobpya crenulatifera, Tate. 



Myrina crenatulifera, Tate, Trans. Roy. Soc, S. Australia 

 1892, p. 131, t.l, figs. 11 and 11a. 



This shell has all the interior characters proper to Philohrya, 

 but its inflated umbo is crowned by a subcircular (not calyculate) 

 prodissoconch which does not interrupt the convexity of the 

 umbo. The absence of costfe further suggests a reference to 

 Hochstetteria, but the elongate ligamental pit and almost terminal 

 umbo are, however, not in agreement thereto. 



In addition to the South Australia locality of the type, speci- 

 mens from two Victorian localities have been submitted to me. 

 Barwon Heads, Mr. T. S. Hall ; Flinders Island, Mr. G. B. 

 Pritchard. 



Philobpya fimbriata, sp. nov. Pi. iv., fig. 8. 



Shell thick, ventricose, contour obliquely subquadrangular, 

 umbos terminal. Prodissoconch relatively small, though prominent, 

 semicircular, its outer margin defined by an elevated rim. An- 

 terior margin of valve inclined at an angle of from 60* to 70° to 

 the dorsal margin ; surface ornamented with about fourteen 

 feeble angular radial ribs, crossed by regularly disposed concentric 

 threads (not so strong as the radial ones), which form imbricating 

 serratures at the intercrossing. Test covered with a tawny sub- 

 pellucid epidermis, which is raised into setae on the radial costse 

 (corresponding with the serratures thereon), and extends as a 

 fringe around the ventral margin of the shell. 



Ligamental pit lanceolate, directed obliquely backwards for one- 

 third or one-half-length of the posterior hinge-line. The trans- 

 verse crenulations on the posterior of the liinge-line are reduced 

 to short crowded strise. 



Dimensio7is of a large example. — Ant. post, diameter, 3'75 ; 

 dorso-ventral diameter, 4-5 ; thickness, 3 mm. ; but the average 

 size is about three by four. 



Habitats. — Tasmania, Derwent and Frederick Henry Bay, coll. 

 Mr. May ; South Australia in dredge-siftings from St. Vincent 

 and Spencer Gulfs — dead shells numerous, living examples few, 

 coll. Dr. Joseph Verco, 



Victoria, among Kellia rostulata, Tate, dredged in life, seven 

 to nine fathoms at Port Phillip Heads by the late Mr. J. B. 

 Wilson (my collection). 



Philobrya tpigonopsis, Hutton, sp. 



Mytilicardia trigonojms, Hutton, Trans. New Zealand 

 Institute, vol. xvii., p. 324, 1885; id, " Macleay Memorial 

 Volume," p. 85, t. 9, f. 94 a-b, 1893. 



Sabitats. — Wanganui (Pliocene) and Petane (Miocene), New 

 Zealand. 



