Fig. 74. Types of chordate sperm. All the chordate sperm belong to the flagellate 

 variety. {A) Amphioxus iprotochordate). (B) Sa/mo (teleost). (C) Perca (teleost). 

 (D) Petromyzon (cyclostome). (E) Raja (elasmobranch). (F) Biifo (anuran). (G) 

 Rana (anuran). (H) Salamandra (urodele). (I) Angiiis (lizard). (J) Crex (bird). 

 (K) Fringilla (bird). (L) Tardus (bird). (M) Echidna (monotrematous mammal). 

 (N) Mus (eutherian mammal). (O, P) Man (full view and side view, respectively). 



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