. L'histoire naturelle de Cambridge. Zoologie. 655 ACANTHOPTERYGII Fam. 1. Berycidae.-Un ou plusieurs des suborbitals émettant un lamina interne soutenant l'oeil ; entopterygoid présents. Vertèbres antérieure sans apophyses transverses ; tous ou la plupart des côtes inséré sur l'apophyse transverse où elles sont développées. Deux narines de chaque côté. Gill-muqueuses sans isthme ; 4 à 10 rayons branchiostèges ; branchies 4, une fente derrière le quatrième ; pseudobranchiae. Os pharyngien inférieur séparés. A'eiitral avec ailettes 1 colonne et 6 à 13 rayons mous.. Fig. .-Bcryx 400 splendens, J nat. taille. (Après

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. The Cambridge natural history. Zoology. ACANTHOPTERYGII 655 Fam. 1. Berycidae.—One or several of the suborbitals emitting an internal lamina supporting the eye ; entopterygoid present. Anterior vertebrae without transverse processes ; all or most of the ribs inserted on the transverse processes where these are developed. Two nostrils on each side. Gill-membranes free from isthmus; 4 to 10 branchiostegal rays; gills 4, a slit behind the fourth; pseudobranchiae. Lower pharyngeal bones separate. A'eiitral fins with 1 spine and 6 to 13 soft rays.. Fig. 400 .—Bcryx splendens, J nat. size. (After Goode and Bean.) This family is remarkable for the retention of two archaic characters: the large number of rays to the ventral fins and the duct between the air-bladder and the digestif tract; the latter character is, however, not universal, and has only been found in two genera {Beryx and Holocentrum). The scaling of the body varies greatly, and so does the development of the spines in the vertical fins. Several genera {Melampluies, Anoplogaster, Trach- ichthys, etc.) have the head studded with large muciferous cavities which are covered with a thin skin. The vent is usually situated far behind the ventral fin, but in Paratrachichthys, a genus closely allied to Trachichthys, it occupies a more anterior position, between the ventrals, whilst in Aphredoderus it shifts still further with age, opening on the throat in the adult. The Berycidae were abundantly represented in Cretaceous deposits by Beryx and other genera more or less closely related to living forms^ and they appear to have been the precursors of other Perciform Fishes. About 70 species, referred to 13 genera, are known to live at the present day, mostly at great depths, m. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Harmer, S. F. (Sidney

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