PLATE XT. 
1 )(“ltoj)Pcten liimefoniiis, Morris, sp. 
Ki<f. 1. A ii'reatly exfoliated convex valve disjilayiiig the lateral ohli(jue sulcus, and faint costae. 
Fig. 2. Concavo-convex valve of the same s}ieciinen (Fig. 1 ) in a similar condition of preservation, 
and the costa* again faintly pers;e]itil)l(‘. 
l)eltopecten leniusculus, Dana, sj). 
Fig. 3. hlxternal impression of the ilat or right valv(*, with both auricles preserved, as well as 
the costa* and latilamina*. 
Aviculopecten pi'ofundus, iJc Koninch {'!). 
Fig. 4. Internal cast of a right valve, believed to be that of this species. 
Fig. . 0 . Natural relief from an external impression of a similar right valve ; the costse are shown 
cn^ssed by close frills. 
Figs. 1, 
FiS- 
Fig. 
Fig. 
Localities. 
Maria Island, Tasmania. 
3. Near Dee’s Hotel, West Maitland. 
4. Ilavensfleld. 
b. Rutherford. 
I 
