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THE AMERICAN XATURALIST [Vol. XLI 



mentation stages, showing that thev had been quite recently laid. 

 The egg-laying season follows immediately after the deposition of 

 spermatophores, and lasts six or seven days. Nearly every bunch 

 of eggs found on April 10 was close to a group of spermatophores. 



On April 16, in the pond where 25 groups of spermatophores 

 had been counted nearly a week before, about 55 bunches of eggs 

 were found. Of these, many bunches were deposited in groups of 

 two to four, probably by the same female. The number of aggre- 

 gations of eggs very nearly equalled the number of groups of 

 spermatophores. 



D. The Adults. Secondary Sexwil Characteristics. During 

 the breeding season, at least, the cloacal region of the male is quite 

 prominent; that of the single female examined was much less 

 swollen, and the orifice was smaller. The cloaca of the male is 

 lined with fine parallel papillated ridges, extending inward for a 

 few millimeters; between these ridges are deep grooves, lined with 

 cilia whose beat is outward. These ridges and grooves were not 

 found in the single female examined. According to Kingsbury 

 ('95) the female Amblystoma, as well as the male, has cilia in the 

 cloaca but the tract is less extensive. The urogenital sinus of 

 the male is larger than that of the female, probably to hokl a con- 

 siderable supply of seminal fluid preliminary to the deposition of a 

 spermatophore. No secondary sexual cliaracters to indicate the 

 clasping of the female by the male were found. 



II. Discussion. 



Andrews ('97) described the structure and distribution of some 

 spermatophores which he attributed to A nibli/sfonia piiiirtnfvm, but 

 without positive identification. He states tliat tiiesc spermato- 

 phores were more slender and higher than those of Triton virid- 



