PLATE 84. 
Page 
421* 
Fig. 1-5. Ceratiocaris maccoyanus. 
1 . A specimen preserving the tail-spines, several articulations of the bod}-, 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. 
8. A fragment preserving the tail-spines, with two or three of the articulations. 
4. A similar fragment. 
5. A similar but larger fragment. 
Fig. 6. Ceratiocaris acuminatus. 
6. The left valve of the carapace of this species. 
Fig. 7. Ceratiocaris : sp.? 
7. A crushed specimen preserving the mutilated carapace and several of the articulations, 
but too indistinct for determination : it may be identical with the preceding. 
Fig. 8. Pterygotus cobbi? 
8. An articulation of the abdomen, which probably belongs to this or to some other species 
of the genus. 
422* 
422* 
417 * 
