ON AN UNNAMED SPECIES OF PECTEN. 
EXPLANATION OF PLATE V. 
Fig. I . — Peclen praecursor, sp. nov. Holotype. Spring Creek, 
Torquay. (Dennant Coll.) Janjukian. 
Fig. 2— P. praecursor, sp. nov. Paratype. Waurn Ponds, near 
Geelong. (Coll. Geol. Surv., Victoria.) Janjukian. 
Fig. 3. — P. praecursor, sp. nov. Paratype. Curlewis. (Coll. Geol. 
Surv., Victoria. Ad. 12.) Barwonian. 
The figures arc enlarged 7-25ths more than actual size 
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