Classification of some Teleostean Fishes. 3 



with 16 branched rays; pelvics subabdominal, 7 or 8 rayed, 

 without spine. Jaws with villiform teetli in bands ; teeth 

 on parasphenoid, vomer, ]:»alatine3, pterygoids, and nieso- 

 pterygoids. A pair of hyoid barbels. Upper edge of 

 maxillary slipping under the prfeorbital and anterior sub- 

 orbitals ; two supramaxillaries, the posterior not overlapping 

 the anterior ; all the suborbitals forming a subocular shelf ; 

 nasals moderately large, separated in front by the prsemaxillary 



Fig. 1. 



Skeleton of caudal fiu of Polymixia nobilis (1) and Hoplopteryx 



affinis (2). 



n, neural spine ; h, haemal spine ; ep, epaxial basalia (epurals) ; 



u, uroneurals ; %, hypurals ; e, c', centra. 



processes and behind by the ethmoid, to which they are 

 united by suture ; supraoccipital and parietals not overlapped 

 by the frontals, with prominent crests ; occipital crest ex- 

 tending to anterior edge of frontals ; alisphenoids separate, 

 bridged by the orbitosphenoid. Hypocoracoids narrowed 

 forwards below ; pelvic bones remote from the cleithra. 

 Vertebrae 28-34 ; last two centra upturned and anterior uro- 

 neural united with the penultimate centrum hy suture. 



