370 



TELEOSTEI 



possessing compound vertebrae, abbreviate heterocercal tail, ganoid 

 scales with peg and socket articulation, fulcra, and possibly a 

 splenial and supra - angular, it becomes obvious that the group 

 ( Isospondyli) can no longer be fitted into any phylogenetic scheme. 

 The Leptolepidae, however, may be classed as primitive Teleosts, 

 and the remaining families can be grouped together into various 

 sub-orders with considerable confidence, but of the relationship 

 between these sub-orders, of their exact position on the phylogenetic 

 tree, we know as yet comparatively little. 



Order 3. TELEOSTEI. 



b-Order GADIFORMES. 



Series 2 

 Sub-Order 2 ANGUILLIFORMES. 



Divitmo I. ArJm: 



clock/I, ^W 



Sub-Order 4. CASTER 

 Tribe 1. GruUroittndei, 



Divi.ion ! NancM, Trilj 



Orou|. A. i'nc/iriieq'koli, Tribe * iP*<*'ow: 



Group B. Caloaphnlt, Trib < 



Tribe 6. Scombriforma, 

 Tribe 7 *rrHfro, 



DIAGRAM IV. PHYLOGENY OF THE TELEOSTEI. 



