466 bulletin: museum of comparative zoology. 



Inasmuch as this species has not only separate premaxillaries, but 

 lacks the prefrontal bones, I can see no reason why it should be in- 

 cluded in Eurycea (Spelerpes and.). It deserves generic rank more 

 than does Gyrinophilus, which is usually accorded that rank. 



69. PsEUDOTRiTON MONTANUS Baird. 



N. C: Beaufort, 997.— Tenn.: Knoxville, 224 (2). 



At the base of the free-tongued salamanders should come those 

 which have two premaxillaries, as Gyrinophilus and Geotriton. 

 These two genera differ from each other in that Gyrinophilus has large 

 prefrontals which form part of the border of the nasal opening, while 

 Geotriton lacks these bones altogether. 



Pseudotriton has the prefrontals cut off from the nasal opening, 

 but the premaxillaries are co-ossified. 



Eurycea has the prefrontals cut off from the nasal opening. Its 

 premaxillaries are co-ossified. 



Minor characters allying Pseudotriton to Gyrinophilus are seen 

 in the habitus, the dentition, the color, and the larvae, which differ 

 from those of Eurycea. Only one species of Eurycea, E. lucifuga, 

 approaches the species of Pseudotriton in color. 



70. Pseudotriton ruber ruber (Sonnini). 



N.J.: Plainfiield, 2,302 (2) ; Ridgewood, 2,408; Schooleys Mountain, 159 (3).— 

 Pa.: Norristown, 170(7); 1,412.— Ky., 4,760-4,762 (3 tort-ae); Bee Spring, 

 2,220; 4,558-4,561 (4); 4,738-4,741 (4 larvae); Castor County, 1,243 

 (larva); Cumberland Gap, 4,664-4,666 (3 larvae); Edmonson County, 

 999; Mammoth Cave, 1,680 (6).— Tenn.: Knoxville, 223.— N. C: 

 Catawba County, 1,381; Old Fort, 998.— Ga., 193 (5); 210 (5); 217 

 (2); 4,532; 4,562-4,568 (7 larvae); Milledgeville, 185 (2). 



One of the specimens from Edmonson County is very extraordinary. 

 The tail is regenerated and hence has not a normal appearance. 

 Otherwise the proportions are those of P. ruber ruber. The coloration 

 is almost that of P. monianus but lacks the ground color. The pala- 

 tine teeth are quite closely approximated in front, but in a small 

 specimen this may not be of great significance. 



In the larger of the two specimens from Milledgeville the vomerine 

 teeth are not continuous with the parasphenoid series. 



