EXPLANATIONS OF PLATES. 



PLATE I. 



Xictiiritit maculatus. skeleton from below, two-thirds uatural size 



PLATE II. 



Xectunis maciilatiis, natural size. 



Fig. 1. Skull, superior view. 

 '2. Skull, 'uferior view. 

 :i. Skull, left side, exterior view. 



4. Skull, left side, interior view. 



5. First and second vertebne, from below. 



6. First and second vertebr.e, from above. 



7. First and second vertebne, right side. 



8. Atlas, from front. 



;». Second vertebra^, from behind. 



PLATE III. 



(Copied from Wiedersheim's Kopfskelet der Urodeleu.) 



I'lc. 1. Xccturns mdculatns, skull, from below, displaying the chondrocrauium of 

 one side. 



•■i. NeciKvux maculatits, skull, from above, displaying the cartilaginous nasal cap- 

 sules. 



:{. Cruplohrunclius alhglienienniH, skull, left side. 



I. Ci-jiptohraiivhttn allef/henicnsiH, skull, from above, showing chondrocrauium of 

 one side. 



."). CryptobraiichuH nllegheniensis, skull, from below, showing cartilages of one side. 



PLATE IV. 



S'lliiiiiii mnciilatus, two-thirds natural size, from below, showing viscera, mostly in 

 l>lace ; the altmeutury canal and corpus adiposum displaced to the right 

 side of the animal. 



PLATE V. 



Cijiiilobraiicluis aUegheniensis, skeleton, from above, half natural size. 



PLATE VI. 

 <'iiiiiiobranchua aUegheuieiiaiH, skeleton, from below, half natural size. 



PLATE VII. 



I'njptobranchiis aUeghenienais, viscera from below in jiosition, two-thirds natural size. 

 Drawn by Prof. S. F. Baird. <(, auricle : r. ventricle of L«»art ; /,, liver; 

 wi, nu'diasfiuuii ; a, stomach; i, intestines ; o, oviduct; o', loutitnolle of 

 oviduct; //, gall-blailder ; r, rectum; c, urinary bladder. 

 1951— Bull. 34 32 4W 



im 



