284 CONTRIBUTIONS TO NOETH AMERICAN ICHTHYOLOGY IV. 



concave part of its margin. Both jaws with minute teeth. Gill-rakers 

 very long. Pectorals and ventrals developed. Dorsal well back, but 

 before anal. Adipose fin rudimentary. Anal fin long. Branchiostegals 

 8 or 9. Size small. Species about 4. (Dedictited to Maurolico, an 

 Italian naturalist.) 



'Phosphoresceut organs aijpearing as impressions on tlie skin. 



46§. m. boreaSis (Nilss.) Giinther. 



Dark greenish, sides silvery. Body compressed. Mouth wide, the 

 lower jaw much i^rojecting. Teeth small. Eye large, 3 in head. Five 

 luminous spots on the throat, 12 between pectorals and ventrals, above 

 these a row of 8, 5 between ventrals and anal, vent to tail 24. Dorsal 

 nearer tail than snout. Adipose fin very small. Ventrals below dorsal. 

 Caudal forked. Head 3i; depth 3i D. 10; A. 15. L. 2i inches. 



[iStorer.) North Atlantic; rare off our coasts. 



' (Scojxlus borealis Nilssou, Observ. Zool. 9; Giinther, v, 389: Scopelus linmboUlii DeKay, 

 N. Y. Fauna, Fish. 246: Scopelus humboldU Storer, Hist. Fish. Mass. 328 (not of Cuvier). 



Family XLIV.— CHAULIODONTID.E. 



[The ChauUodonts.) 



Body oblong or elongate, comiiressed, covered with rather large, thin, 

 deciduous scales. Lateral line present. No barbels. Series of phos- 

 l^horescent spots running along the lower side of the head, body, and 

 tail. Head much compressed, the bones thiu, but ossified. Mouth with 

 the cleft extremelj' wide, its margins formed by maxillaries and pre- 

 maxillaries, both of which are provided with teeth. Teeth unequal, 

 some of them long and pointed, fang-like. Pectorals and ventrals well 

 developed. Adipose fin i^resent. Caudal forked. Gill-openings very 

 wide. No pseudobranchiiE. No air-bladder. Deep waters of the At- 

 lantic. Genera 2, Gonostdma and Chaidiodus^ differing widely in the 

 position of the dorsal, the size of the anal, and the develox)meut of the 

 gill-rakers ; 2 species are known. 



{Sttrnoptyckidw gtou]} Chauliodontlna Giinther, v, 391, 392.) 



"Dorsal in front of ventrals ; no gill-rakers ; anal with less than 20 rays. 



Chauliodus, 133. 



133.— CHAUI^IOOUS Bloeh &. Schneider. 

 Viper-Jislies. 



(Bloeh «& Schneider Syst. Ichth. 1601, 430: type Chauliodus sloaui Bloch & Schneider.) 



Body elongate, compressed, covered with very thin deciduous scales 

 of moderate size. Head short, much compressed and elevated, the 



