Acanthias vulgaris 1 -- Raja 1 2 Psammobatis 1 -- Sebastes 1 -- **Zanclorhynchus -- 1 *Agriopus 1 -- Agonus 1 -- *Aphritis 1 -- *Eleginus 1 -- **Chænichthys 1 1 *Bovichthys 2 -- *Notothenia 8 7 **Harpagifer 1 1 Lycodes 4 -- **Magnea 1 -- Lotella 1 -- Merluccius 1 -- **Lepidopsetta -- 1 **Thysanopsetta 1 -- Syngnathus 1 -- **Protocampus 1 -- Myxine 1 -- --- --- 31 13 === === [Illustration: Fig. 108.--_Chænichthys rhinoceratus_, shores of the Antarctic Ocean.] CHAPTER XX. DISTRIBUTION OF PELAGIC FISHES. Pelagic Fishes,--that is, fishes inhabiting the surface of mid-ocean (see p. 255), belong to various orders, viz. Chondropterygians, Acanthopterygians, Physostomes, Lophobranchs, and Plectognaths. But neither Anacanths nor Pharyngognaths contribute to this series of the Marine Fauna. The following genera and families are included in it:-- CHONDROPTERYGII: Carcharias, Galeocerdo, Thalassorhinus, Zygæna, Triænodon, Lamnidæ, Rhinodon, Notidanidæ, Læmargus, Euprotomicrus, Echinorhinus, Isistius; Myliobatidæ. ACANTHOPTERYGII: Dactylopterus, Micropteryx, Scombrina, Gastrochisma, Nomeus, Centrolophus, Coryphænina, Seriola, Temnodon, Naucrates, Psenes, Xiphiidæ, Antennarius. PHYSOSTOMI: Sternoptychidæ, Scopelus, Astronesthes, Scombresocidæ (majority). LOPHOBRANCHII: Hippocampus. PLECTOGNATHI: Orthagoriscus, and some other Gymnodonts.