THE ORDERS OF TELEOSTOMOUS FISHES 



5(K 



SUBCLASS 



Teleostomi 



ORDER, SUBORDER, ETC. FAMILY OR GENUS 



REMARKS. 



Apodes (?) Car- 



encheli Derichthyidas 



Apodes Lyomeri Saccopharyngidas 

 Nematognathi Several genera especially 



Clarias, Stegophilwn. 

 Eventognathi Cobitidas Tail not gephyrocercal. 



Gymnonoti Gymnotidae Eel-like Characins. 



Haplomi Neochanna apoda (Galaxiidae) 



Thoracostraci Several genera elongate but 



not strictly anguilliform 

 Anacanthini Enchelyopus a Gadid 



Acanthop. Jugulares Ammodytidae Tail not gephyrocercal. 



" Congrogadidas 



Blenniidas Cheenops, Xiphasia, 



Cryptacanthus Stathmonotus, 



and many others, 

 Ptilichthyidas 

 Zoarcidaa (Lycodes, Ly- 



cenchelys, and other 



genera.) 

 Ophidiidae 



Ateleopodidas (Podatelidae) 

 Brotulidas (Bassoszetus 



and 2 other genera) 



« 



Heterosomata 



Symphurus 



(a Soleid ; body inccm 

 pletely elongate, tail gephy- 

 rocercal; apodal). 



<< 



Taeniosomi 



Trachypteridae {.Regale 

 cus.) 







Anguilliform 



Amphibia, Reptilia, 



Mammalia. 



Amphibia 



Stegocephali 



Aistopodidas 



(No limbs). 



<< 



Urodela 



Amphiumidae 



(Limbs vestigial). 



" 



Gymnophiona 



Ccecilians 



(No limbs). 



Reptilia 



Lacertilia 



Anguidae 



{Pphisaurus, Anguis) (nc 

 limbs). 



fi 



Ophidia 



Enhydrina 



(Body compressed, tail eel- 

 like). 



u 



Rhynchocephalia Saurophidium 



(? Aquatic) 









(Limbs reduced). 



" 



Pythonomorpha 



Tylosaurus etc. 



(But limbs functional). 



ti 



Crocodilia 



Metriorhyr.chus 



(But limbs functional). 



Mammalia 



Archaeoceti 



Zeuglodon 





Evolution of the Caudal Fin. 



Appendix II. 



(Modified from Ryder » and Dollo*) 



»" On the Origin of Heterocercy and the Evolution of the Fins' and Fin- 

 Rays of Fishes." Rept. U. S. Commission Fish and Fisheries, 1884, pp. 

 981-1107. Also in Am. Naturalist, 1885, pp. 90-97, 200-204. 



2 "Sur la Phylogehie des Dipneustes," Bull. Soc. Belgique de Geol., 

 tome ix, 1895, pp. 79-128. "Results du Voyage du S. Y. Belgica . . .," 

 Zoologie, Poissons, 4to, Anvers, 1904, pp. 234-239. 



