18 



distal end an oval with a flat side. The diameter contracts 

 gradually to the middle. 



Measurements. m. 



Length of bone 0150 



!proxinially . 0036 

 medially ' .0019 

 distally 0037 



This bone is plainly that of a urodele salamander. 

 Scapherpeton excisum, sp. nov. 



This salamander is represented in the collection of the expedi- 

 tion by vertebrae of three individuals of different sizes. They all 

 agree in having the anterior zygapophyses separated by the con- 

 cave excavation of the roof of the neural canal usual in ordinary 

 salamanders, and in the moderate development of the hypapophy- 

 sial keel. As a result, the articular extremities of the centra are 

 not produced so far inferiorly as in S. laticolle. The longitudinal 

 ridge from the inferior part of the diapophysis is pronounced, and 

 separates a deep fossa above it from another below it. The longi- 

 tudinal perforation of the base of the diapophysis issues in the 

 superior fossa, while in the two smaller specimens a vertical per- 

 foration joins it from the inferior fossa. As in the preceding two 

 species, one articular face is a little deeper than the other. 



Measurements. 



{longitudinal 

 vertical 

 transverse . 

 Width of neural canal do. . 

 Depth " " ... 



t longitudinal 

 Diameter centrum No. 2 < vertical 



1 transverse . 



ding por 



M. 



.009 

 .006 

 .005 

 .003 



.0015 

 .0060 

 .0033 

 .0030 



tion of an 



Specimen No. 1 is as large as the correspon 

 Amphiuma means. 



Scapherpeton favosum, sp. nov. 



The vertebra which I select as typical of this species is more 

 distinct in character from those of the three species above 

 described, than they are from each other. Although the centrum 

 presents a strong inferior keel, its border is not horizontal or con- 

 vex, but concave, and the articular cups are proportionally little 

 elongated downwards. The diapophyses have at their bases a 



