430 



Comparative Morphology of Chorda I es 



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^^^^^^W ^'"^ W^~ 



Fig 333. Examples of Chondrostei (A), Polypterini (B), and Holostei (C, D). 

 (A) Aeipenser rubimndus (he Sueur). (B) Polypterus bichir. (C) Lepidostem 

 tristoechus (Bloch and Schneider). (D) Amia calva (Linnaeus), female. (A, C, U, 

 courtesy, Jordan and Evermann: "Fishes of North and Middle America Wash- 

 ington/The Smithsonian Institution. B, after Dean. Courtesy, Neal and Rand: 

 "Chordate Anatomv," Philadelphia, The Blakiston Company.) 



