A1TSERES (Continued) 



Species 



Chromosome Number 

 _2n n Remarks 



Observer 



References 



Anas nlatyrhyncha 80s, 79 o 4o£(l) X-x£,X-Oo_; 



don^stica 

 ('P":,i?st'ic duck') 



X-rc* 



Anas platyrhyncha 



A. acuta 



80s 



X-Xo\x~0o_; 



X^r 



4o£(l) 



X-Xo\x-0o; 

 X-R x 



X-xfl.X-Co; 



X=V n 



X^r 5 



Schoneberg '13 A.M. A. 83. 



Yamashina '50, 

 '51 



Schoneberg '13 



Sokolowskaya 



'35 



Crew & Koller 

 '36 



Yamashina '41, 

 '42, '43 



Auk (Bull. An. 

 Ornith. Union), 1950; 

 Iden-Sogo-Kenkyu . 



A.M.A. 83. 



Z.B. (Koa&aw) 4. 



Proc. Roy. Soc. 

 Edinb. 56. 



Jap. J.G. 17; Cyt. 

 12; Jap. J.G. 19- 



*r -the 5th largest rod-shaped chrom. 



-252- 



