Abstract
Of 1074 larvae examined by the tail-tip method (amputation of tail-tip and mounting), 1056 were diploid, 3 triploid, and the remainder showed various types of polyploidy. In T. pyrrhogaster, 3 triploid and 1 haploid specimens were found among 273 larvae. In 134 larvae of Eurycea bilineata 13 triploid and 2 tetraploid individuals were found.