ORIGINS OF AGAMIC PATTERNS 



623 



(1880) and Zacharias (1885); and those of the cirripeds are described as 

 fibrillar without differentiation of head or tail.'" 



D 



Fig. 199, A-E. — Arthropod spermatozoa. A-C, Pinnotheres, Maja, Munidia, all Crustacea 

 (from Koltzoff, 1906); D, Agalena, an arachnid (from Bosenberg, 1905); E, Copris, a beetle 

 (from Ballowitz, 1890&). 



Most animal spermatozoa are distinctly axiate, and spiral patterns and 

 specific asymmetries are related in a definite way to the axiate pattern. 

 Moreover, in many forms the polar pattern appears to be definitely re- 



"* For further descriptions and figures of spermatozoa see Retzius, 1881; many papers by 

 Ballowitz, 1886-1908; Koltzoff, 1906, 1909; Korschelt und Heider, 1902, and literature cited; 

 E. B. Wilson, 1925, and literature cited. 



