396 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 63. 



Fig. 1.— Dors.\l view of skull of Desmognathus fusca, 3 X nat. size. A , Atlas; EiO, Exoccipital 



BONE (THE OCCIPITO-PETROSAL OF WlEDERSHEIM); F, FRONTAL BONE; M, MaXILLARY BONE: NA, 



Nares: A'^, Nasal bone; P. Parietal bone; P M, Premaxillaky bone; PMF, PREMAxaLAEr 



fontanelle; Q, Quadrate bone; 6'?, !^QUAMOSAL bone 

 Fig. 2.— Ventral view of same, 3 X nat. size (teeth somewhat diagrammatic); Os, Oebito- 



sphenoid bone; PaS, Parasphenoid bone; St, Stapes; K, Vomer; other letters as before. 

 Fig. 3.— Lateral view of same, 3 X nat. size: letters as before 

 Fig. 4.— a section of the skull of Desmognathus quadramaculata taken just anterior to the 



internal nares, 3.5 X NAT. SIZE. /, FRONTAL; 771, Maxillary; n, Nasal; ria, Nasalpassage, which 



is indicated by shading; p, Premaxillary; v, Vomero-palatine. 

 Fig. 5.— Dorsal view of a female Leurognathus marmorata, 3.2 X nat. size. 

 Fig. 6.— Ventral view of same, 3.2 X nat. size. The internal nares are blackened, and the 



position OF the actual choanae in the entire head is indicated by a ring of dots. 

 Fig. 7.— Lateral view op same, 3.2 X nat. size. 

 Fig. 8.— a section of the skui l of the same taken just anteeioe to the internal nares, 3.5 X 



NAT. size. Letters as in Fig. \. 

 Fig 9.— Dorsal view of skull of Spelerpes ruber, 3 X nat. size. Od, Odontoid process of 



atlas; P F, Prefrontal bone: other letters as before. 

 Fig. 10. — Ventral view OF same, 3 X nat. size. Letters as before. (Teeth somewhat diageammatic.) 

 Fig. IL — Lateral view of same, 3 X nat. size. Letters as before. 



[Figs. 1-3 and 9-11 by the author; figs. 4-8 are here reproduced by the kind permission of Dr. Moore.) 



