502 BULLETIN 34, UNITED STATES NATIONAL MUSEUM. 



Fig. 3-5. Adult. 



3. From above. 



4. From below. 



5. From right side. 



6. GyrinopMlus porpliyriticus, part of right side of skull of larva, showing 

 trabecula, etc. 



PLATE XXXI. 



Speler2)es ruber, viscera, 9 , drawn by S. F. Baird. 



Fig. 1. Viscera, in situ, natural size ; eggs nearly ready for expulsion. Lettering as 

 before. Irt. The heart removed. Tea, ascending vena cava; A, auricle; 

 VP, vena indmonalis ; v, ventricle; Ba, bulbus arteriosus: ccA, canalis 

 communis arteriosus. 



2. Fontanelle of oviduct, near stomach. 



3. Left ovary with corpus adiposum on left side. 



4. Liver; a, from below. 



5. Cloaca and kidney, with vasa efferentia renis and vas deferens. 



6. Plethodon glxdinosus, $, kidneys, from below: v e fc' vasa efferentia renis 



stretched out of place to show their course, ou left of figure. 



PLATE XXXII. 



Bones of Urodela three times natural size ; drawings by Prof. S. F. Baird. 



Fig. 1. Scapular arch of one side of Sp eleri^es ruber which has j ust passed its metamor- 

 phosis; the branchiffi not qi;ite obliterated; Carlisle, Pa., June 12,1849. 



2. Humerus of the same. 



3. Cubitus and manus of the same. 



4. Amblystoma pujictafum, posterior leg of larva just changing to the adult. 



PLATE XXXIII. 



Skulls of GyrinopkUus porphyriticus. 



Fig. 1-3. Skull of adult, natural size. 



1. From above. 



2. From below. 



3. From left side. 



4-6. Skull of advanced larva, twice natural size. 



4. From above. 



5. From below. 



6. From left side. 



PLATE XXXIV. 



(Copied fromW. R. Parker.) 



FlG. 1-4. Gyrinophilus porphyriticus, larvae, much enlarged. 



1-2. Larva less advanced than that represented in Plate XXXIII. 



1. From above. 



2. From below. 



3-4, Larva still less advanced than that represented in figs. 1, 2, 



3. From above. 



4. From below. 



5-6. Desmognathus fusea, skull. 



5. From above. 



6. From below. 



