PL.Vl'E xm. 
Axieulopreten .Sprenti, Johnsfoiu 
1. Lai’i;'o l(*£t viilvo, ])i'obalily nearly full grown, exhibiting the outward fjweep of the costa', 
and traces of spines on th(> anterior side. 
I )(dtoi>ecten subipniKpielineatus, 21cCoi/, sp. 
'1. OutliiK' of section across a. sjiecimen, showing the relativ(> ('onvexity of the valves. 
A\ iculojK'cten iMitchelli, Efh. JiI.and Dun. 
•'». Outliui' of a perfect spei'imcn, with tlu' \'alv('s in apposition to show the relative 
comt'xity. 
Deltopecten farleycuisis, Eth.fl. and Dun, 
t. Kxti'rnal impression of a I'ight \'alv(\ 
b. A similar impression, tlie auricles more perfect than those of Fig. 4, the body of the 
\ al\'(' less so. 
<i. Internal cast of a left vaK'e, with the chondrophore. 
Deltopecten obliipiatus, Eth.fil. and Dun. 
7. Internal cast of a left valvia 
Deltopecten subipnnquelineatus, McCoy., sp. 
8. Fxtei'ual impression fi'om a relief of a h'ft vah’e on which the three orders of costa' are 
sh.o'.vn. 
A\ iculo)a'cten Sju’enti, Johnston (?). 
il. Tntei'nal cast of a left valve. 
Aviculopecten temiicollis, Dana, sp. 
10. Left ^■alve, partly testiferous ; th" ilelic ite e )nc'ntrlc lines are shown on the umbonal 
region. 
11. Internal cast of a left valve. 
lib Internal cast of a larger left vah'e. 
Localities. 
Fig. 
1. 
Ibjkolbin 
Dig. 
p 
Wollongong. 
Dig. 
.‘h 
Allandale. 
Dig. 
1. 
Dbirley. 
Dig. 
b. 
Flew Golden .Vge Mine, Boorook 
Dig. 
(i. 
Ravcnsfleld 
Dig. 
7. 
Porter’s l>ay, d’asmania. 
S. 
Alaitland District (Pater.son ?). 
!). 
Dbirley. 
Fio-s. 10- 
12. 
Uavensfield. 
