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ILLINOIS BIOLOGICAL MONOGRAPHS 



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EXPLANATION OF PLATE 



Fig. 33. — Transverse section through the roof of the anterior end of tlie olio capsule, 60 mm 

 Amiurus. 



Fig. 34. — Transverse section through the synotic tectum, 32 mm. larva. 



Fig. 35. — Diagram of nerve, neural arch and myotome relations of a larval Amiurus. 



Fig. 36. — Transverse section through the anterior end of the anterior semicircular canal, 

 32 mm. Amiurus. 



Fig. 37. — Transverse section through the posterior end of the basal plate, 32 mm. larva. 

 Fig. 38. — Transverse sections through the posterior end of the otic capsule, 32 mm. Amiurus. 

 Fig. 39. — Transverse section through the posterior part of the ethmoid region, 32 mm. 

 Amiurus. 



