BY C. IIEDLEY. 207 



The name Anomalocardia^ of Klein, is barred as pre-Linnean 

 by the rules of nomenclature. Those who prefer to break up 

 " Area " can place this species in Gray's group, Noetia. 



Philobrya inornata, n.sp. 

 (Plate X., figs. 40-43.) 



Shell very inequilateral, rather inflated, smooth. Colour pale 

 yellow. Sculpture : around the prodissoconch are faint radial 

 wrinkles; beyond, delicate growth-lines are crossed by weak 

 radiating threads, which vanish as the shell ages, leaving the 

 latter part smooth. Hinge-line straight, nearly square with the 

 anterior margin; ventral margin regularly rounded. Prodisso- 

 conch subquadrate, flat, with raised margins like a dish. Chon- 

 drophore oblique, long and narrow; posterior crenulations faint, 

 anterior in a short bunch of about half a dozen. Inner ventral 

 margin with a few crenulations at the anterior side, feebly den- 

 ticulate for the remainder of the edge. Height 2-0; length 1-14; 

 depth 0-8 mm. 



Hab. — Sixteen miles east of Wollongong in 100 fathoms ; 

 several valves were dredged by Mr. G. H. Halligan and myself. 



Type. — To be presented to the Australian Museum. 



Bernard divided Philobrya into two groups — the first smooth, 

 the second radially ribbed. If, as I shall endeavour to show, 

 Tate's Myrina crenatnlifera should be rejected from this genus 

 because of its two adductors, and want of a prodissoconch cap, 

 then the present is the first smooth Australian Philobrya. 



Pelseneer transfers this genus to the Arcidse."* 



Philippiella rubra, n.sp. 

 (Plate X., figs. 44-47.) 



Shell small, solid, mytiliform, with a tendency to spiral growth, 

 rather inflated. Dorsal posterior and ventral margins arched, 

 anterior straight or concave. Umbo terminal, swollen, without 



Expedition Antarctique Beige, Moll. 1903, p. 41. 



