214 ILLINOIS BIOLOGICAL MONOGRAPHS [502 



EXPLANATION OF PLATE 



Fig. 39. A bothrium crassunl, scolex of specimen from Salmo solar, surficial view. 



Fig. 40. Abothrium crassum, same specimen, lateral view. 



Fig. 41. Abothrium crassum, young scolex from Lota maculosa. 



Fig. 42. Abothrium crassum, same specimen, lateral view. 



Fig. 43. Haplobothrium globuliforme, primary scolex, toto preparation. 



Fig. 44. Haplobothrium globuliforme, primary strobila, toto preparation. 



