2576 Bulletin tf, United States National Museum. 



bital ridge rounded; barbel greater than pupil; teeth bi serial or partly 

 triserial above; second dorsal spine with short retrorse serrte, the lower 

 fifth smooth; base of first dorsal 3f in head; interspace between dorsal 

 fins \ base of first dorsal, greater than diameter of pupil. This species is 

 distinguishable from most American Macrouri by the very firm scales, 

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

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



Macrunis firmisquamis, GILL & TOWNSEND, Proc. Biol. Soc. Wash., xi, 1897 (Sept. 17, 1897) t 

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

 Coll. Albatross.) 



1003. CHALINURA, Goode & Bean. 



Chalinura, GOODE & BEAN, Bull. Mus. Comp. Zool., x, No. 5, 198, 1883 (Simula). 

 Ghalinurus,* GUNTHER, 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 villiform band, with an outer series 

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

 or palatines; small pseudobranchife present. Gill rakers spiny, 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, differing in the dentition ; the genus Optonnrus, with dorsal spine 

 unarmed, is very close to Chalinura. (xaX.iv 6^ a strap or thong; ovpd, 

 tail.) 



a. Snout long, longer than eye, which is 5 in head; pectoral 1 in head; dorsal spine 1J 



in head; scales 130. SERRULA, 2951. 



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



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



each about as long as head. FILIFERA, 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. II, 9-7(5 (?); 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 reaching 

 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 ; braiichiostegal membrane narrowly free from the 

 isthmus, the first gill opening restricted "as in Macrourus; 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" Chalinura. Ohalinura 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 group end in urug. 



