PLATE III. 
Fig. ] . 
Fig. 2. 
Fig. 3. 
Fig. Sa. 
Fig. i. 
Fig. 4«. 
Fig. 5. 
Fig. G. 
Fig. Ga. 
Fig. Gb. 
Fig. 7. 
Fig. 7 a. 
Fig. 7h. 
Fig. S. 
Fig. 8a. 
Fig. Sh. 
Fig. 8c. 
Fig. Gd. 
Fig. 9. 
Fig. 10. 
Fig. 11. 
Fig. 12. 
Fig. 12a. 
Page. 
Syringopora auloporoides, L. G. de Koninck — Specimen of natural size ... 59 
Leptcena subcsquicostata, L. G. de Koniuck — Specimen of natural size, ventral 
valve ... ... ... ... ... ... ... ... ... ... 72 
Peniamerus pimilus, L. G. de Koninck — Front view — x 2 ... ... ... 72 
The same, dorsal valve, and umbo of ventral — x 2 ... ... ... ... 72 
Atrypa pUcateUa, L. G. de Kouinck — View of the ventral valve, natural size... 78 
The same, seen from the front ... ... ... ... ... ... ... 78 
Spirifer muUipJicatus, L. G. de Koninck — Dorsal valve, natural size ... ... 81 
(SjPO’iyer _ya5sc«s/s, W. B. Clarke — Dorsal valve, natural size ... ... ... 83 
The same, side view... ... ... ... ... ... ... ... ... 83 
,, from the front ... ... ... ... ... ...- ... ... 83 
Spirifer latisinuatiis, L. G. de Koninck — Dorsal valve, natural size ... ... 84 
The same, from the front ... ... ... ... ... ... ... ... 84 
,, side view... ... ... ... ... ... ... ... ... 84 
Tellinomya Glarhei, L. G. de Kouinck — Left valve, natural size, side view ... 88 
The same, enlarged ... ... ... ... ... ... ... ... ... 88 
,, seen from the side ... ... ... ... ... ... ... 88 
„ seen from above, or the dorsal side ... ... ... ... ... 88 
,, the hinge enlarged ... ... ... ... ... ... ... 88 
Avicidopecten Ptheridgei,lii. G. de Koninck — Left valve, natural size, side view 89 
Aviculopccten C/ar^e/, L. G. do Koninck — Left valve, natural size, side view... 90 
Avicidopecten McLeayi, L. G. de Koninck — Left valve. This valve, of which 
a little less than the posterior half is known, has been completed on the 
anterior side, from several indications on the fragment of matrix enclosing 
it. It has been drawn from a gutta-percha cast, natural size ... ... 91 
Pterinea laminosa, L. G. de Koninck — Eight valve, natural size, seen from 
above ... ... ... ... ... ... ... ... ... ... 92 
The same, from the side 
92 
