358 



APPENDIX II 



Sub-phylum IV. VERTEBRATA or CRANIATA 

 Class 1. Cyclostomata 



Sub-class 1. CYCLOSTOMI 



Order 1. Myxinoidea {Myxine, Bdellostoma) 

 Order 2. Petromyzontea {Petromyzon marinus, the 

 prev; Lampcfra, and others.) 

 OSTRACODERMI* 

 Anaspida * 

 osteostraci * 



1am- 



Sub-class 2. 



Order 1. 



Order 2. 



Order 3. Heterostraci * 

 Class 2. Pisces 



Sub-class 1. ELASMOBRANCHII 



Order 1. Cladoselachii * {Cladoselache '^) 



Order 2. Pleuropterygii * 



Order 3. Acanthodii * 



Order 4. Selachii (Sqiialus, Mustelus, and many others. 

 Includes several hundreds of genera of sharks, 

 skates, and raj^s; both living and fossil). 



Order 5. Holocephali (an aberrant group, often given 

 the rank of a sub-class.) 

 Sub-class 2. TELEOSTOMI 



Order 1. Chondrostei {Acipenser, Scaphyrhynchus, Poly- 

 odon and numerous fossils, including most prim- 

 itive Actinopterygii.) 



Order 2. Holostei {Lepidosteiis, Amia, and many fossils). 



Order 3. Teleostei (a heterogeneous assemblage, tech- 

 nically divided into several orders.) 



Order 4. Crossopterygii {Eusthenopteron*, Sauripterus*, 

 Polypterus, Calamoichthys.) 

 Sub-class 3. DIPNOI 



Order 1. Sirenoidei {Neoceratodus, Protopterus, Lepidosi- 

 rcn, and some closely allied fossils.) 

 PLACODERMI * 

 Antiarchi * 

 Arthrodira * 



Sub-class 4. 

 Order 1. 

 Order 2. 



Class Amphibia 



Order 1. Stegoceph.\lia * 



{Archaegosaurus *, and others.) 

 Order 2. Urodela (Inckides those with persistent gills, 

 Necturus, Siren; Crypt obranchus; and the sala- 

 manders and newts, Amhlystoma, Triturus.) 

 Order 3. Anura (The frogs and toads; Rana, Bnfo.) 

 Order 4. Gymnophiona (The caecelians, or legless am- 

 phibia.) 



Class Reptilia 



Sub-class 1. ANAPSIDA 



Order 1. Cotylos.^uria * (Seymouria*) 

 Order 2. Chelonia (Turtles, Chelone, 

 the land tortoises.) 

 Sub-class 2. SYNAPSIDA* 

 Order 1. Theromorpha* 

 Order 2. Therapsida * (Cynognathus*, Ictidopsis*) 



Chrysemys; and 



