PLATE 84. 



p«g« 



Fig. 1-5. Oeratiocaris maccoyanus. 421* 



1. A specimen preserving the tail-spines, several articulations of the body, and a part of the 



carapace, the body having been folded between the valves of the latter. 



2. A specimen in similar condition preserving one side of the carapace more nearly entire. 



3. A fragment preserving the tail-spines, with two or three of the articulations. 



4. A similar fragment. 



5. A similar but larger fragment. 



Pig. 6. Oeratiocaris acuminatus. 422* 



6. The left valve of the carapace of this species. 



Fig. 7. Oeratiocaris : sp.1 422* 



7. A crushed specimen preserving the mutilated carapace and several of the artieiilations, 



but too indistinct for determination : it may be identical with the preceding. 



Fig. 8. Pterygotus coBBi? 417* 



8. An articulation of the abdomen, which probably belongs to this or to some other species 



of the genus. 



