URODELA (Continued) 



Species 



Chromosome Number 

 2n n 



Remarks 



Observer 



Ref erencee 



Triturus viridescens 11m (n) 

 7-20m 



33m(3n) 



2n,3n,n 



Tylototriton andersoni 



24s 

 24s 



Androgenic; Kaylor '35, '39 A.R. 64; E.B. 77. 

 Chrom. num- 

 ber variable 



From refri- Fankhauser & Proc. Rat. Acad, 



geratod eggs; Griffiths '39; Sci. 25; Genet. 



3n in P0# Griffiths '41 26. 



5n naturally Fankhauser '41 Genet. 26. 

 appeared. 



From eggs Fankhauser '42, Biol. Symp. 6: 



treated with F. & watson'42 Proc. Nat. Acad, 



cold & heat. a,b, F. '45, F. Sci. 28: A.R. 84: 



& Godwin '48 Q. Rev. Biol. 20: 



Proc. Fat. Acad. 



Sci. 34. 



zfti.u) 



Sato '41 

 Makino '50 



Kagaku 11. 



La Kromosomo 6. 



ANURA 



Species 



Chromosome Number 

 2n n 



Remarks 



Observer 



References 



Bufonidae 



Bufo americanus 



B . arenarum 



B. bufo japonicus 



B. bufo 



B. calami ta 

 n 



22s 



22s 



22s 



1 lt(l, 11) 3t-Y$T 



120 (1) 

 llftl.ll) 



Sex chrom. 

 unknown. 



i-xti 



22 V's 



Witschi 'i!3 



Cyt. 4. 



Saez, Rojas & C.R.S.B. 117; 

 Robertis '34a, Rev. Soc. Argen- 

 '34b, "36a,b tine Biol. 10; 



Inst. Mus. Nac. 



Plata, 2; Z.Z. 



M.A. 24. 



Iriki'29; 

 Minouchi & 

 Iriki '31 



Wickbom'U5, 

 '49 



Z.M. (Jap.) 41; 

 K.C.S. Kyoto I. 

 U. Ser. B, 6. 



Hered. 31, 35. 



Bataillon '10 A.Z.E.G. Ser. V, 6. 



Stohler '27a, 

 •27b, '28 



B.Z. 47; Verh., 

 Schweiz Nat. Ges. 

 108; Z.Z. M.A. 7. 



-?34- 



