CADUCIBRANCHIATA. 43 



Length 83^ inches. Head to cervical fold i inch. 

 Tail 4 " Transverse diameter of head i " 



Body 4 3^" " " " body i " 



Habitat California, Nebraska, New Mexico, and the 

 region of the Rocky Mountains. 



Siredon lichenoides, Bd. is here placed in the list of 

 synonyms because the recent observations of Prof. O. 

 C. Marsh (37) on the specimens from Lake Como, so 

 confirmatory of and more explicit in regard to species 

 than those made by Dumeril, (32) leave no doubt that 

 it is simply an undeveloped larva of this species. Baird's 

 description (27, c) which is still valuable as giving the 

 characteristics of the young, is as follows: "Body uni- 

 form blackish brown, covered all over with licheniform 

 patches of grayish yellow ; snout rounded ; tail compress- 

 ed and lanceolated; toes broad and short.*' 



Amblystoma macrodaetylum, Baird. 



Color in alcohol brown, with dorsal stripe of grayish 

 brown extending from head to the end of the tail ; dark 

 brown spread over the animal from this stripe to the 

 belly, and a few spots occur in the stripe; lateral gray- 

 ish white dots present, and sometimes extend to the 

 limbs ; tail somewhat compressed ; costal furrows twelve ; 

 body cylindrical, depressed; head depressed and elon- 

 gated ; palatine teeth in three or four patches ; transverse 



