BREEDING HABITS OF AMPHIBIA 



39 



The adult female: South African 

 clawed toad Xenopus laevis. 



Photo "by courtesy of Dra. Weis- 

 man and Coates, from "The 

 South African Frog in Preg- 

 nancy and Diagnosis." N. Y. 

 Biologic Besearch Foundation, 

 19i;4. 



Dorsal view Ventral view 



Amplexus (coupling) In Xenopus laevis. 



(From Dr. H. A. Shapiro 1956: 

 Brit. Jour. Exp. Biol. 15:'+8) 



AMBLYSTCHA JEFFERSONIANUM , Jefferson's salamander. This salamander is found in southeast- 

 ern Canada and northeastern United States westward to Minnesota and southward to Virginia. 

 It prefers cold climate and the adults measure about 7 inches from tip to tip. It is pri- 

 marily nocturnal, burrowing in loose soil and leaf mold, under logs. It is bluish black 

 or dark brown in color with numerous bluish white flecks concentrated on its sides. The 

 swollen vent of the male protrudes noticeably and its tail is longer and flatter than that 

 of the female. 



Arablystoma jef fersonianura, Jefferson's 

 salamander. (After Bishop) 



Hemidactylium scutatum, tlie four-toed 

 salamander found on May 11th. (After 

 Bishop) 



EGG-LAYING OF SALAMANDERS 



i Courtesy C. H. Pope. Chicago Mus. Nat. Hist.) 



