PLATE XXI. 



(All of the natural size except Figs. 11 d, 11 e, and 11/.) 



Fig. 1. — Dithi/rocarls tediuUnea, Scouler. Left valve. B. M., 59541, No. 17. 

 (Page 148.) 



Fig. 2. — TJ. ie^fndlnea, Scouler. Inperfect carapace. B. M., 59541, No. 18. 

 (Page 148.) 



Fig. Z.—D. testudiiiea, Scouler. Right valve. M. Sc. A. Ediu., Coutts, 1887, 

 H, No. 13 ; also PI. XXXI, fig. 2. (Page 149.) 



Fig. 4. — D. testudinea, Scouler. Two displaced valves and tail. M. Sc. A. 

 Edin., Coutts, 1887, ^, No. 11. (Page 149.) 



Fig. 5. — D. festndinea, Scouler. Abdominal segments and tail. B.M., 59541, 

 No. 27; also PL XXXI, fig. 4. (Page 150.) 



Fig. 6. — D. testudinea, Scouler. Right valve. M. Sc. A. Edin., Coutts, 1887, 

 fl. No. 12 ; also PI. XXXI, fig. 3. (Page 150.) 



Fig. 7 a.—D. Scoideri {?), M'Coy. Left valve. 



Fig. 7 h.—D. Scouler! (F), M'Coy. Counterpart of fig. 

 (bis). No. 17. (Page 155.) 



. Fig. 8. — Chsenocaris tenuistriata, M'Coy, sp. Left valve. B. M., 32938, 

 No. 23. (Vise.) 



Fig. 9.— Chsenocaris tenuistriata, M'Coy. Left valve. B. M., 44987, No. 24. 

 (Settle.) 



Fig. 10. — Dithyrocaris Scoideri {?), M'Coy. Caudal extremity. B. M., 59541, 

 No. 22. (Page 155.) 



Fig. 11 a. — Chsenocaris tenuistriata, WCoy,STp. Right valve. Mus. Cambridge. 

 (Settle.) 



Fig. 11/;. — The same. Edge view. 



Fig. 11 c. — The same. End view. 



Fig. 11 d. — The same. Part of surface at the ventral margin. X 20. 



Fig. 11 6. — The same. Part of surface at the mesolateral ridge. X 20. 



Fig. 11/. — The same. Part of surface near one end of the valve. X 20. 



|m. G. S. Sc.,r-^' 



