322 PROCEEDINGS OF THE ACADEMY OF [1899. 



premaxillary for the whole width of its palatal surface. The in- 

 ternal nares are inconspicuous narrow slits situated close to the 

 anterior margins of the orbits at the extreme posterior outer angle 

 of the vomero-palatines and extending into the palatal plates of 

 the maxillaries. The actual choanse correspond to the outer ends of 

 these clefts and are consequently very widely separated, a condition 

 very different from that found in Desmofjnathus, in which the clefts 

 cut deep into the vomero-palatines and expand at their inner ends 

 into conspicuous openings, which are the choanre. 



The parasphenoid teeth are borne on a pair of long, slender and 

 pointed dentigerous plates, which are placed together as a sagittate 

 area, posterior to the middle of the orbit. Each plate bears about 

 eighteen or twenty oblique rows of minute teeth, each row con- 

 taining from five to twelve teeth. There are about one 

 hundred and twenty jaw teeth above and an equal number 

 below, about fifteen being borne by the premaxillary. All of 

 these teeth are set on the inner face of the alveolar flange and have 

 simple, blunt, slightly compressed and undivided crowns. In the 

 posterior part of both jaws they become smaller and more crowded. 

 In the specimen dissected the posterior cranial region, the ptery- 

 goids and the branchio-hyal apparatus are essentially as in Desmor/- 

 nathus. There are sixteen presacral, one sacral and twenty-four 

 postsacral vertebrae. 



The visceral anatomy resembles in its general features the three 

 species of Desmognathus which I have studied. There is no trace 

 of lungs, and it may be added that lungs are entirely absent in 

 Desmognathm nigra and D. orchrojjhcea,^ in which this deficiency 

 has not previously been noted. 



The three examples of this sj^ecies above described, being all 

 that have been taken, were found in a large clear rocky pool be- 

 neath a waterfall of a stream on the south flank of Grandfather 

 Mt., X. C. , and at an elevation of about 3,500 feet. From what 

 observations were made they seem to be essentially aquatic, remain- 

 ing in the deeper parts of the pool and not burrowing beneath 

 stones in places merely wet, as does the D. nigra, which occurs in 

 ^reat numbers in the same region. L. marmorata is much less 



^ The examples of this species M'hich Wilder originally de-cribe.l as lung- 

 less have more recently been identified as belonging to the species Spelerpes 

 bilineatns. 



