224 ILLINOIS BIOLOGICAL MONOGRAPHS [434 



EXPLANATION OF PLATE 



Fig. 28. Stenophora elongata Ellis. After Ellis, 1912a, Fig. 4n. 



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



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



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



Duboscq, 1903a, Fig. 15. 

 Fig. 32. Echinoniera hispida (Schneider) Labbe. After Schneider, 1875, Plate 



XVI, Fig. 36. 

 Fig. 33. Nina indicia Merton. After Merton, 191 1, Plate III, Fig. i. 

 Fig. 34. Acutispora macrocephala Crawley. After Crawley, 1903a, Plate XXX, 



Fig. I. 

 Fig. 35. Trichorhynchus pulcher Schneider. After Leidy, 1889, Fig. 3. 

 Fig. 36. Trichorhynchus pulcher Schneider. After Schneider, 1882, Plate XIII, 



Fig. 14. 

 Fig. 2)7  Actinocephalus striatus Leger and Duboscq. After Leger and Duboscq, 



1903a, Fig. 16. 

 Figs. 38, 39, 40. Actinocephalus 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 lithobii Crawley. After Crawley, 1903a, Plate XXX, 



Fig. 18. 

 Figs. 45, 46. Amphorocephalus aniphorellus 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. 

 Fig. 51. Rhopalonia geophili Leger. After Labbe, 1899, Fig. 21. 



