RECENT BRITISH OSTRACODA. 



493 



Fig. 10. Carapace, as seen from below, x 40. 

 11. do. do. front, x 40. 



Paradoxostoma obliquum. 



18. Carapace, seen from left side, x 40. 



19. do. do. above, x 40. 



20. do. do. below, x 40. 



21. do. do. front, x 40. 



Paradoxostoma abbreviatum. 



22. Carapace (female), seen from left side, 



x40. 



23. Carapace (female), seen from above, x 40. 



24. do. do. below, x 40. 



25. do. do. front, x 40. 



Paradoxostoma sarniense. 



26. Carapace (female), seen from left side, 



x40. 



27. Carapace (female), seen from above, x 40. 



28. do. do. below, x 40. 



29. do. do. front, x 40. 



Paradoxostoma flexuosum. 



30. Carapace, seen from left side, x 40. 



31. do. do. above, x 40. 



32. do. do. below, x 40. 



33. do. do. front, x 40. 



34. Left valve from above, showing hinge- 



margin, x 40. 



Paradoxostoma hibernicum. 



35. Carapace (female), seen from left side, 



x40. 



36. Carapace (female), seen from above, x 40. 



Paradoxostoma arcuaturn. 

 Fig. 37. Carapace, seen from left side, x 40. 



38. do. do. above, x 40. 



Paradoxostoma Normani. 



39. Carapace, seen from left side, x 40. 



40. do. do. above, x 40. 



Paradoxostoma ■pulchellum. 



41. Carapace, seen from left side, x 40. 



42. do. do. above, x 40. 



Cytherideis subulata. 



43. Carapace, seen from left side, x 40. 



44. do. do. above, x 40. 



45. do. do. below, x 40. 



46. do. do. front, x 40. 



Bythocythere constricta. 



47. Carapace of female, from left side, x 40. 



48. Carapace of male, fi'om left side, x l-O. 



49. do. do. above, x 40. 



50. do. do. below, x 40. 



51. do. do. front, x 40. 



52. Outlines of separate valves, showing 



hinge-margins, x 40. 



Polycope orbicularis. 



53. Carapace, seen from right side, x 120. 



54. do. do. above, x 120. 



55. do. do. behind, x 120. 



56. Imperfect valve (Roundstone), x 84. 



57. Sculpture of shell, x 140. 



Polycope dentata. 



58. Carapace, seen from left side, x 84. 



59. do. do. below, x 81. 



Plate X 



In this and the following Plates (except Plate XI 

 letters {a, b, c, &c.) uniformly refer to one and the 

 explanatory text. The letters refer as follows : — 



a. Upper antenna. 



b. Lower antenna : a', poison-gland ; b' , flagellum 



or urticating seta. 



c. Mandible : a', palp ; IJ, branchial appendage. 



d. First maxilla: a', external palp; V, branchial 



plate. 



e. Second maxilla : a', palp ; b' , branchial ap- 



pendage. 

 VOL. XXVI. 



I.), illustrating details of anatomical structure, the 

 same organ, except when otherwise stated in the 



/. First foot. 



g. Second foot. 



h. Third foot. 



i. Postabdominal ramus. 

 k. Male copulative organ. 



I. Male " glandula mucosa." 



3 Y 



