330 THE GENERA OF FISHES, PART III 



850. COSTA (1864). (Fossil Fishes.) Atti, Pontan. 



Oronzio Gabriele Costa. 



6enoscopus Costa, VIII, 59; orthotype Ionoscopus petraroi^ Costa (fossil). 



Name a (needless?) substitute for Ionoscopus. 

 Hyptius Costa, 80; orthotype H. sebastiani Costa. A synonym of Sauropsidium 



Costa, 1850. 

 Platycerhynchus Costa, VIII, 98; orthotype P. rhombeus Costa (fossil). An 

 indeterminable ally of Belonostomus. 



851. EGERTON (1864). On Some Ichthyolites . . . from New South Wales. 



Quart. Journ. Geol. Soc, XX. 

 Philie de Malpas Grey Egerton. 

 Myriolepis Egerton, XX, 3; orthotype M. clarkei Egert. (fossil). 

 Cleithrolepis Egerton, XX, 3; orthotype C. granulatus Egert. (fossil). 



852. GILL (1864). Description of a New Labroid Genus Allied to Trochocopus Gthr. 



Proc. Acad. Nat. Sci. Phila., XVI. 

 Theodore Gill. 

 Pimelometopon Gill, 58; orthotype Labrus pulcher Ayres. 



853. GILL (1864). Notes on the Nomenclature of Genera and Species of the 



Family Echeneidoidce. Proc. Acad. Nat. Sci. Phila., XVI. 



Theodore Gill. 

 Leptecheneis Gill, 60 ; orthotype Echeneis naucrates L. A synonym of Echeneis L. 

 as restricted by Gill, 1860. 



854. GILL (1864). Critical Remarks on the Genera Sebastes and Sebastodes of 



Ayres. Proc. Acad. Nat. Sci. Phila., XVI. 

 Theodore Gill. 

 Sebastomus Gill, 147; orthotype Sebastes rosaceus Grd. 

 Sebastosomus Gill, 147 ; orthotype Sebastes melanops Grd. 



855. GILL (1864). Second Contribution to the Selachology of California. Proc. 



Acad. Nat. Sci. Phila., XVI. 

 Theodore Gill. 

 Eugaleus Gill, 148; orthotype Squalus galeus L. Substitute for Galeus Cuv., 

 preoccupied by Galeus Raf. A synonym of Galeorhinus Blaniv., as restricted 

 by Gill. 

 Pleuracromylon Gill, 148; orthotype Mustelus l^vis = Galeus mustelus Gill. 

 A synonym of Mustelus Cuv., not of Valmont, the last probably not eligible. 



856. GILL ( 1864) . Several Points in Ichthyology. Proc. Acad. Nat. Sci. Phila., XVI. 



Theodore Gill. 

 Electrophorus Gill, 151 ; orthotype Gymnotus electricus L. 

 Gymnotes Gill, 152; orthotype Gymnotus ^quilabiatus Humboldt. A synonym 



of Sternopygus M. & T. 

 Hypopomus Gill, 152; orthotype Rhamphichthys mulleri Kaup. Replaces 



Brachvrhamphichthys Gthr., 1870. 



857. GILL (1864). Azotes on the Paralepidoids and Microstomatoids and on Some 

 Peculiarities of Arctic Ichthyology. Proc. Acad. Nat. Sci. Phila., XVI. 



Arctozenus Gill, 188; orthotype Paralepis borealis Reinh. 



