2576 Bulletin 4.7, United States National Mnseum. 



bital ridge rounded; barbel greater than pupil; teeth biserial or partly 

 triserial above; second dorsal spine witli sbort retrorsc scrne, the lower 

 iifth smooth; base of first dorsal Skinhead; interspace between <lorsal 

 fins I base of first dorsal, greater than diameter of jmpil. This species is 

 distinguishable from most American Macrouri by the very firm scales, 

 and from B. clarki by the much shorter ventral. Bering Sea. Only the 

 type, 31 inches long, known, {firmus, firm; squama, scale.) 



Mwrurus firmisquamis. Gill & Townsend, Proc. Biol. Soc. Wash., xi, 1897 (Sept. 17, 1897)^ 

 234, Bering Sea, southwest of Pribilof Islands. (Tyi)e, No. 48772, U. S. Nat. Mus. 

 Coll. Allatross.) 



1003. CHALINURA, Goode & Bean. 



Chalinura, Goode & Bean, Bull. Mus. Cotnp. Zool., x. No. 5, 198, 1883 (Hmula) . 

 Chalinurus,* Guntheh, Challenger Report, xxn, 124, 144, 1887; change in spelling. 



Scales cycloid, fluted longitudinally, with slightly radiating striae. 

 Snout long, broad, truncate, not much produced. Mouth lateral, subter- 

 minal, very large. Head without prominent ridges, except the subocular 

 ones and those upon the snout. Suborbital ridge not reaching angle of 

 preopercle. Teeth in the upper jaw in a villiforinband, with an outer series 

 much enlarged, those of the lower jaw nniserial, large. No teeth on vomer 

 or palatines; small psendobranchiic present. Gill rakers siiinv, strong, 

 depressible, in double series on anterior arch. Ventrals below the pecto- 

 rals; chin with a barbel. Dorsal spine serrate; soft dorsal much lower 

 than anal. Deep sea fishes. Species numerous. This genus is allied to 

 Macrourus, dift'ering in the dentition ; the genus Optonnriis, with dorsal spine 

 unarmed, is very close to Chalinura. (xctXtvo?, a strap or thong; ovpd, 

 tail.) 



a. Snout long, longer than eve, ■which is 5 in head; pectoral 13 in head; dor.sal spine IJ 



in head; scales 130. skhrula, 2951. 



aa. Snout moderate, about as long as eye, which is 4 in head ; doisal, pectoral, and 



ventral produced, the pectoral 1^ in head, the dorsal spine and ventral filament 



each about as long as head. filifeba, 2952. 



aaa. Snout very short, as long as eye, which is 5 in head; ventrals very long. 



SIMULA, 2953. 



2951. CHALINURA SERRULA, Bean. 



Head .5^ in total length. D. 11,9-76 (?); scales 7 or 8-130-17; Br. 6. 

 Cheeks and opercles scaly ; snout with a median serrated keel on the nose ; 

 diameter of eye less than length of snout, 5 in head ; maxillary reacliing 

 vertical from posterior margin of eye, its length 2^ in head; mandible 

 about 2 in head, a row of 5 pores on its under surface and 6 pores on the 

 edge of the suborbitals; bianchiostegal membrane narrowly free from the 

 isthmus, the first gill opening restricted as in ^[acrourus; gill rakers small 

 tubercles, 11 below the angle of the first arch, and only 1 or 2 above 

 the angle ; length of pectoral equals postorbital part of head ; ventrals 



''Goode & Bean rightly protest against the wanton "action of the English ichthyol- 

 ogists in changing the form of the generic name" Clialinura. Chalinura is perfectly 

 correct, and should be used even if it were not so, as it is the original form, the only 

 reason for changing it being that other generic names in the gi-oup end in urus. 



