Fig. 122. Haploids in the newt, Triturus pyrrhogaster. (a) Haploid 

 {left) and diploid larvae; the haploid was developed from a cold-treated 

 egg; larvae 18 days old before amputation of the tail tips, (b) Another 

 cold-induced haploid larva (left) and its control, 31 days old. The haploid 

 shows dwarfing, edema, and microcephaly. Photographs X8- (Courtesy of 

 Dr. G. Fankhauser in the Quarterly Review of Biology.) 



Fig. 123. Somatic chromosomes at metaphase from the epidermal cells 

 of the tailfins of haploid (left) and diploid larvae. X760. (Courtesy of 

 Dr. G. Fankhauser.) 



439 



