HAYIA 55 



properly interpreted the remains of that form. Among the principal 

 genera of this group are MYOXOCEPHALUS Steller and its reduced fresh- 

 water representative, COTTUS L. While in some of the genera bony 

 plates or detached prickly scales are developed, none of the known species 

 has a regular squamation. The affinities of the true COTTID^E with the 

 are apparent. 



The other and doubtless more primitive group may be known as 

 The most primitive of its living genera is JORDANIA Starks, 

 a slender fish with the ventral rays I, 5, and the body covered with 

 normal scales. The extinct genera, EOCOTTUS Woodward and LEPIDO- 

 COTTUS Sauvage are related to JORDANIA. The living genera of ZANIO- 

 LEPHWE (ZANIOLEPIS Girard and XANTOCLES Jordan) may have sprung 

 from similar stock. The living species of ICELID.E are numerous in the 

 North Pacific. Among the principal genera are ICELUS Kroyer, ICELINUS 

 Jordan and TRIGLOPS Reinhardt. ARTEDIUS Girard and HEMILEPIDOTUS 

 Cuvier probably belong to this group, though approaching MYOXO- 

 CEPHALUS in general form. 



Through the courtesy of Professor Theodore D. A. Cockerell we 

 present a photograph of a specimen of LEPIDOCOTTUS BREVIS (Agassiz) 

 (Plate XXXI, fig. 4) from its type locality, the upper Miocene at 

 Oeningen, Baden. 



Of a specimen of some fish from Lompoc, Coll. Miss J. M. Telford, 

 XI we present the photograph. The species may be COTTOID, but we 

 are unable to restore it or to indicate its relationship (Plate XXIII, fig. 3). 



48. Hayia daulica Jordan and Gilbert, new genus and species. 

 (Plate XXIII, fig. 2) 



Head and anterior region of a large fish (No. XXVII) from fine gray 

 shales in Los Angeles. The part preserved is seven and a half inches in 

 length, the head five inches. The whole fish must have been over two feet 

 long. 



Head triangular in outline, its depth at nape one and four-fifths in 

 its length. Mouth long, oblique, the mandible apparently projecting, the 

 maxillary oar-shaped, slightly emarginate behind ; its length about four in 

 head ; no teeth preserved ; bones of head much confused ; a rather sharp 

 bony ridge running horizontally back from the eye, and apparently a 

 broader bony ridge on temporal region behind this ; opercle large, rough, 

 but without spines, the lower part with coarse, radiating ridges. Verte- 

 brae very strong, deeper than long, with strong interneurals. Six neural 

 spines visible under the spinous dorsal, its insertion is opposite third and 

 fourth vertebrae, the spines stout (broken), the number not to be ascer- 

 tained ; the highest about half depth of head ; some broken spines out of 

 place about the head ; imprint of a rather broad pectoral obscure. 



