224 ILLINOIS BIOLOGICAL MONOGRAPHS [434 



EXPLANATION OF PLATE 



T'ig. 28. Stenophora elongata Ellis. After Ellis, 1912a, Fig. 411. 



Fig. 29. Dactylophorus robustiis Leger. After Labbe, 1899, Fig. 27. 



Fig. 30. Nina gracilis Grebnecki. After Labbe, 1899, Fig. 24. 



Fig. 31. Nina giardi corsiciim (Leger and Duboscq) Sokolow. After Leger and 



Duboscq, 1903a, Fig. 15. 

 Fig. 32. Echinomera liispida (Schneider) Labbe. After Schneider, 1875, Plate 



XVI, Fig. 36. 

 Nina indicia Merton. After Merton, 191 1, Plate III, Fig. i. 

 Acutispora inacroccphala Crawley. After Crawley, 1903a, Plate XXX, 



Fig. I. 

 Trichorhynchns pulchcr Schneider. After Leidy, 1889, Fig. 3. 

 Trichorhynchus pulcher Schneider. After Schneider, 1882, Plate XIII, 



Fig. 14. 

 Fig. 2)7- Actinoccphalus striatus Leger and Duboscq. After Leger and Duboscq, 



1903a, Fig. 16. 

 Figs. 38, 39, 40. Actinoccphalus dujardini Schneider. After Schneider, 1875, Plate 



XVI, Fig. 9; Fig. 10; Fig. 12. 

 Fig. 41. Hoplorhynchus scolopendras Crawley. After Crawley, 1903a, Plate XXX, 



Fig. 19. 

 Figs. 42, 43. Hoplorhynchus actinotus (Leidy) Crawley. After Crawley, 1903, 



Plate III, Fig. 37; Leidy, 1889, Fig. 2. 

 Fig. 44. Trichorhynchus litliobii Crawley. After Crawley, 1903a, Plate XXX, 



Fig. 18. 

 Figs. 45, 46. Ainphorocephalus amphorellus Ellis. After Ellis, 1913, Fig. i; Fig. 2. 

 Fig. 47. Species of uncertain genus. After Balbiani, 1889, Plate II, Fig. 34. 

 Fig. 48. Species of uncertain genus. After Kolliker, 1848, Plate III, Fig. 30. 

 Figs. 49, 50. Nina gracilis Grebnecki, in section. After Leger and Duboscq, 1902, 



Plate VI, Fig. 93; Fig. 96. 

 F"ig. 51. Rhopalonia geophili Leger. After Labbe, 1899, Fig- 21. 



