408 RALPH TATE. 
An example of a species of this genus has occurred to me in the - 
Eocene clays at Mornington, but is now too fractured to admit of 
specific determination. 
Class LAMELLIBRANCHIATA. 
Genus Pecten. 
Subgenus Pseudamussium. 
Examples, Pecten Yahlensis,T.-Woods, and Pecten Hochstettert, 
Zittel. 
Genus Lima. 
Subgenus Limatula. 
Examples, Lima Jeffreysiana and polynema, Tate. 
Genus Plicatula. 
PLicaTuLa RAMULOSA, spec. nov 
Test stout, peripheral outline rhomboid- ound attached valve 
somewhat convex, surface of attachment relatively large ; free 
valve flattish ; attached valve ornamented with seven prominent 
augular ribs, some of which bifurcate at about half way to the 
front; free valve with similar ornament, the umbonal area, corres 
ponding with the attachment surface of the other valve, without 
plications except at the margins. Plice crossed by foliar lamelle, 
raised here and there on the plice into squamose scales or into 
nodulations. Interior unknown, umboventral diameter 13, 
anteropost. diameter 17 mm. 
Eocene, Table Cape (a single example of closed paired valves), 
J. Dennant. 
The fossil resembles the living P. ramosa, Lamarck, by com 
parison of actual specimens, but differs by dense lamellation and 
closer plications which are a few more in number. 
Magaritifera, P. Brown, 1789 (Meleagrina) Lamarck. 
Nuculana, Link, 1807, (Leda, Schumacher, 1817). 
Axinea, Poli, 1791 (Pectunculus, Lamarck, 1799). 
Azinus, Sowerby, 1821 (Oryptodon, Turton, 1822). 
Mylitta, D’Orbigny and Recluz (Pythina, auctores, non Hinds). 
