1894. PROCEEDINGS OF THE NATIONAL MUSEUM. 599 



sliort arched series behind the choanie, slightly oblique, converoing- 

 behind, while the parasi)henoid patches are separate their entire length • 

 in D. brimleyorum the vomerine series are much larger, nearly parallel 

 posteriorly, diverging anteriorly, while the paraspheuoid patches are 

 united in their anterior portion. The latter appears also to be a larger 

 species, although not so large as D. nigra, while the coloration 

 approaches closely that of I). fusc<(, except that the lower i)arts are 

 considerably paler. 



AMBYSTOMA AXNULATUM, Cope. 



This species was described by Prof. Cope from a single specimen in 

 the U. S. IS^ational Museum (No. 115C4), the origin of which was 

 unknown. It was consequently not even known with certainty that 

 the species was North American. It was therefore highly interesting 

 to receive from Messrs. Brimley a well-preserved specimen collected at 

 Hot Springs, Ark., thus establishing the habitat of this striking 

 species. 



A direct comparison with the type specimen shows the peculiar col- 

 oration to be identical, with the trilling exception that in the type the 

 light cross-band from arm to arm is interrupted on the middle of the 

 back, while in the new specimen it is continuous, like the other cross 

 bands. A pale cross band between the eyes, not mentioned in Prof. 

 Cope's description, is present in both specimens. The new specimen 

 is comparatively fresh, and the ground color appears to have been 

 black, the cross bands silvery gray. 



There are several structural differences, however, between the two 

 specimens. Thus, in the new specimen, the tail is shorter and some- 

 what compressed terminally; the vomerine series are longer and extend 

 mesially farther forward. The fourth toe is comparatively shorter. 



With only two specimens at hand, the exact locality of one of which 

 is unknown, these differences do not seem important enough to warrant 

 a specific separation, in view of the striking identity of the color pattern, 

 which is absolutely unique in the genus. 



