190 



MONOGRAPH 



Cythere (?) acerosa 



rig. 50. Left valve, front (adult female). 



5 1 -5 1. Perfect carapace (adult male) , lateral, 



dorsal, ventral, and end views, x 40. 



Fig. 55. 



56. 



57. 

 58. 



from 



do. 

 do. 

 do. 



do. 

 do. 



I 



do. 



above, x 40. 

 below, x 40. 

 front, x 40 . 



!♦ 





Plate XXXII 



Cytherura acuticostata. 



1. Carapace (male), seen from left side, x 40 



2. 

 3. 

 4. 



do. 

 do. 

 do. 



do. 

 do. 

 do. 



above, x 40. 

 below, x 40. 

 front, x40. 



5. Carapace (female) from left side, x 40 



6. 

 7. 



8. 



do. 

 do. 

 do. 



do. 

 do. 

 do. 



above, x 40. 

 below, x 40. 

 front, x40. 



9. Carapace (female, smooth variety), from 



left side, X 40. 



10. Carapace (female, smooth variety), from 



above, x 40. 



1 1 . Carapace (female, smooth variety), from 



below, x 40. 



Cytherura cornuta. 



12. Carapace (female?), from left side, x40. 



13. 

 14. 



15. 



do. 

 do. 

 do. 



do. 

 do. 



do. 



above, x 40. 

 below, x 40. 

 front, x 40. 



Cytherura Robertson i . 

 10. Carapace (female), from left side, x40 



17. 

 18. 



do. 

 do. 



do. 



do. 



below, x 40. 



front, x 40. 



Cytherura affinis. 



19. Carapace (female), from left side, x 40 



20. 

 21. 



do. 



do. 



do. 



do. 



below, x 40. 



front, x 40. 



22 



23. 



24. 



25. 



Cytherura angulata. 

 Carapace, seen from left side, x 40 



do. 

 do. 

 do. 



do. 

 do. 

 do. 



above, x 40. 

 below, x 40. 

 front, x 40. 



Cytherura striata. 

 26. Carapace (female), from left side, x 40 



27. 



28. 



do. 



do. 



do. 



do. 



above, x 40. 

 below, x 40. 



Fig 





29. Carapace (female) , from front, x 40. 

 62. Sculpture of shell, x 210. 



64. Carapace (female), from left side, x 84 



65. Interior of left valve, x 84. 



Cytherura lineata. 

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



31. 



do. 



do. 



40 



32. Carapace of male, from left side, x40. 



above, x40. 



33. 

 34. 



67. 



do. 

 do. 

 do. 



do. 

 do. 

 do. 



front, x 40 . 

 left side, x 84. 



Cytherura cuneata. 



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



x40. 



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



37. 

 38. 



do. 

 do. 



do. 

 do. 



below, x 40. 

 front, x40. 



63. Sculpture of shell, x 210. 



Cytherura Sarsii. 



39. Carapace, seen from left side, x 40 



above, x 40. 



below, x 40. 

 front, x40. 



40. 

 41. 

 42. 



do. 

 do. 

 do. 



do. 

 do. 



do. 



Cytherura undata. 

 43. Carapace (male), from left side, x40. 



44. 



45. 

 46. 



do. 

 do. 

 do. 



do. 



do. 

 do. 



above, x 40. 

 below, x40. 

 front, x40. 



47. Carapace (female), left side, x40 



48. 

 49. 

 66. 



do. 

 do. 

 do. 



do. 



do. 

 do. 



above, x 40. 

 below, x 40. 

 left side, x 84 



Cytherura nigrescens. 



50. Carapace (female), from left side, X 40 



above, x 40. 

 below, x 40. 

 front, x 40. 



51 

 52 

 53 



do. 

 do. 

 do. 



do. 

 do. 



do. 



