1856.] 



11 



5 gen. Euproctu?, Cynops, Diemyctylus, Taricba, Triton. 10 sp. E. Rusconi, 

 C. pyrrhogaster, D. viridescens,* Taricba torosus, Triton alpestris, cristatus, 

 marmoratus, palmatus ? punctatus, pyrenaeus and perhaps others. 



5. ELLIPSOGLOSSID.E. Asiatic. 



Tongue ohlorty oval, free at the sides only ; toes 4 5. 

 1 gen. Ellipsoglossa. 1 sp. E. naivia. 



b. With transverse and longitudinal teeth. 

 f6. PLETHODONTID.E. N. American. 



Tongue broad oval, well developed, free at its lateral edges and posteriorly, 

 attached in front ; toes 4 .5. 



3 gen. Desmognathus, Aneides, Plethodon. 6 sp. D. niger, auriculatus, A. 

 lugubris, P. glutinosus, erythronotus and quadrimaculatus ? 



7. BOLITOGLOSSID^. N. American and European. 



Tongue of moderate size, mushroom-shaped, supported hy a central pedicel ; toea 

 4 5 and 4 4. 



4 gen. Batrachoceps, Spelerpes, Pseudotriton, Geotriton. 9 sp. B. quadridigitatus, 

 attenuatus, S. longicauda, gutto-lineata, bi-lineata, mexicana, P. ruber and sal- 

 moneus, G. fuscus. 



8. HEMIDACTYLID^. N. American. 



Tongue oval, attached in front and along the middle, more free posteriorly ; 

 toes 4 4. 



1 gen. Hemidactylium. 1 sp. H, scutatum. 



c. Transverse, but no longitudinal teeth. 



0. AMBYSTOMID^. N. American and Asiatic. 

 Tongue ovate, moderately free at its edges, slightly so in front, attached 

 posteriorly ; toes 4 5. 



2 gen. Onychodactylus, Ambystoma, 15 sp. 0. japonicus. A. punctatum (vene- 

 nosum Bart.) opacum Grav. (fas.'iatum Green) laterale, popbyriticum, macro- 

 dactylum, punctulatum,? tigrinum, luridum, nebulosum, mavortium, episcopus, 

 (an hypoxanlhus Raf.?) talpoideum, proserpine, tenebrosum, and no doubt others. 



Description of two Ichihyodorulites. 



By Joseph Leidy, M. D. 



Stenacanthus nitidus Leidy. The species of a genus supposed to be distinct 

 from those wliich have been described, is indicated by an ichthyodorulite, dis- 

 covered by Charles E. Smith, Esq., in association with the remains of Ilolopty- 

 chius, in the old Red Sandstone formation of Tioga county, Pennsylvania. The 

 specimen is partially imbedded in a mass of red sandstone ; and it has its point 

 broken off and is otherwise mutilated. The spine is straight throughout and 

 indicates no disposition to curve. In its perfect condition it appears to have 



* D. viridescens Raf. (Tr. dorsalis) and D. miniatus (Tr. symmetricus) are 

 probably the same, the orange color and roughness being appearances which 

 the female more especially presents after a long sojourn on land. At least this 

 may be inferred from what is known of the habits of the European Tritons. 

 Schlegel says that such is the case with T. punctatus. He also remarks that he 

 has specimens of marmoratus (one of the very roughest of the Tritons, it we may 

 judge from the specimen in the Bonaparte collection) perfectly smooth, and we 

 have those of dorsalis smooth and more or less rough. The Triton marmoratus, 

 according to Kaup, leaves the water in June and becomes a land animal ; the crests 

 of the male disappear, and the tail, from a swimming organ, becomes round. 



