PLATE IX. 
Fiif. 1. 
•_>, 
Fi--. 
Fii;'. 1. 
Fig. 5. 
Fig 6. 
Fig. 7. 
Fig S. 
Fig. U. 
Fig. 10. 
Fig. 11. 
Fig. 12. 
1 )t'lto}HH.-ten .sul)(|uiinjiK'liiic‘atus, McCoi/, sp. 
Intcnuil cast of a left valve ; the priinai y co.sta’ onlv art' \ isible. 
Partially exfoliateil testiferous left vah’e, with the pi'iiiiary, secondary, and tertiary 
costa* pi'cserx't'd. 
Intt'rnal east of a small left ^al\e, less the auricles; primary ami secondary costa* are 
di.scernihle. 
Internal cast of tin* Hat or right \ alve of the specimen represented in Fig. 3. Above 
mav bt* seen the anterior auricle. 
Internal cast of portion of a right \al\'t*. 
A\ iculopccten IFigelhardti, lith.Jil. and Dun. 
Compressed intei-nal cast of a hirge right valve, exhihiting ohlitjuity, to which this 
s])ccies often appears to be* subject. The relative pi'oportions of the auricles are 
well-defined in thi.s figurt*, with the by.ssal sinus below the anterior. 
Intt*rnal cast of a smaller and nearly symmetrical riglit valve. 
Internal cast similar to I'dg. 7, hut showing anterior oljliipiity like that of Fig. h. 
Incomplete testiferous l■ight \al\(*. 
Internal cast of a largi*, nearlv svmmetrical, left \al\(*. 
Internal cast of a small left valv(*. 
Deltnpccten, sp. 
Internal cast of an orbicular valvt*, not referable to any species of Ddtopcctai hnxdn 
described. 
Loculi lies. 
1. 
Ivutherfoi'd. 
Vig. 
•> 
1 >apto. 
Figs. 
3, 4. 
IMingenew, W estern .Vustralia. 
Fig. 
b. 
Failey. 
Fig. 
(i. 
Shi lalha veil District. 
Figs. 
7, 3. 
Cabbage Tree Point, Shoalhaven. 
Fig. 
9, 
\Voll(>nl)i Hoad. 
Fig. 
10. 
Xear W*est Maitland. 
Fig. 
11. 
Farley. 
Fig. 
1-2. 
Tokal, Paterson. 
L 
