84: NEW PALEOZOIC VERTEBRATA. [Feb. 5, 



The ulna or radius is short, and there is no indication of osseous 

 carpus. The digits are long and slender, and parts of four are pre- 

 served. The first and second phalanges are slender, subequal, and 

 a little shorter than the metacarpal. The species had a short leg 

 and a long foot. The only trace of posterior limb is a bone (per- 

 haps both bones) of the leg. This is quite short, and in appropri- 

 ate proportion to the fore leg, but the piece is too obscure for posi- 

 tive determination. 



The general proportions are salamandrine with indications of the 

 long tail which characterizes the group of which Urocordylus Hux. 

 is the type. 



Measurements. mm. 



• 



Width of belly at middle 28 



Length of median rod of ventral armature 6 



'' '< intermediate rod of ventral armature 6 



Width '^ '' '' '' " .... I 



Length " external " '' '' 9 



Width " " " " " 2 



Length '' (?) ulna 6.5 



" " metacarpal 5 



*' " phalange i 3 



<« <' " ii 2.5 



" (?) tibia 5-5 



" " a caudal vertebra, body 4.5 



** '' '^ " neural spine 8 



" '' *^ " haemal spine 7 



From the Coal Measures of Cannelton, Pa. ; from the collection 

 of Mr. R. D. Lacoe. 



This interesting batrachian is about the size of the Oestocephalus 

 remexj but it appears to have had a lateral crest on each side bor- 

 dering the abdomen, which is wanting in that and all other forms 

 of the subclass Stegocephalia known to me. The lateral rod-plates 

 of the abdominal armature look as though they were in life closely 

 invested by the integument, or even projecting more or less from it. 

 The forms of the abdominal rods and their alveoli are different 

 from anything in the order known thus far. 



