2160 Bulletin 4.7, United States National Museum. 



length of the ventral rays, its first ray conspicuously serrated on its ante- 

 rior edge. The insertion of the anal fin is in the perpendicular below the 

 end of the first dorsal fin ; the length of its longest rays is equal to \ 

 that of the middle caudal rays ; caudal truncated, very slightly emargi- 

 nate; pectoral very peculiar in structure, its longest ray, the ninth, reach- 

 ing to base of the caudal rays and equal in length to 4 times that of the 

 fourth dorsal spine; the tenth ray a trifle shorter, extending nearly to 

 the end of the soft dorsal; the eleventh, twelfth, and thirteenth rays 

 graduated, decreasing in regular proportion, the thirteenth being less 

 than J as long as the tenth ; the eighth about midway between the tenth 

 and the eleventh; the first slightly longer than the twelfth, and those 

 intermediate between the first and the eighth are graduated in length, so 

 as to form a rounded .outline for the anterior or upper portion of the fin; 

 the pectoral appendages slender, the third being slightly greater in length 

 than the thirteenth ray, being as long as the first, while the second is 

 intermediate between the other two; the ventral inserted directly under 

 the base of the pectoral appendages, its first spine about equal in length 

 to the preopercular spine from the base of the supplemental spines, its 

 longest, the third and fourth, exactly equal in length to the base of the 

 second dorsal. Color brownish above, with about 4 indistinct transverse 

 band- like blotches, 1 of which is on the base of the caudal, whitish beneath ; 

 vertical fins uniform, the tips of the caudal rays blackish, with 2 indis- 

 tinct cloud-like bands in advance of the terminal bands thus formed ; a 

 black blotch, with whitish anterior margin on the membrane between the 

 fourth and fifth dorsal spines; a very inconspicuous blackish spot on 

 the membrane between the fifth and sixth; others still less conspicuous 

 on the succeeding interspaces; the pectoral blotched and clouded with 

 blackish brown and white. Off Charleston, South Carolina; 1 specimen 

 obtained in the same haul with Notosema dilectum. (Goode & Bean.) It 

 is a very well-marked species, distinguished especially by its very long 

 pectoral fin. (alatus, winged.) 



Prionotus alatus, GOODE & BEAN, Bull. Mus. Comp. Zool., xix, 210, 1883, deep sea off 

 Charleston, South Carolina ; JOKDAN, Cat. Fish. N". Am., 114, 1885 ; JORDAN & HUGHES, 

 Proc. U. S. Nat. Mus. 1886, 332; GOODE & BEAN, Ocean. Ichth., 467, 1896. 



Subgenus PRIONOTUS. 

 2488. PRIONOTUS MILES, Jenyns. 



Head 2J ; depth 4; eye 4* in head. D. X-12; A. 10 or 11; scales about 

 78. Body elongate, rather slender. Head moderate, not very rough; 

 mouth moderate, maxillary scarcely reaching front of orbit, 2 in head ; 

 interorbital area concave, narrow, If in eye ; no transverse postorbital 

 groove ; no spine on center of radiation of cheek, opercular spine rather 

 weak, less prominent than the humeral spine, preopercular spine slightly 

 larger than the humeral spine, no smaller one before it; all of the spines 

 simple; preorbital ridge serrulate, no conspicuous postorbital ridge; tem- 

 poral ridges present, all of the bones of the head with radiating stria?; 

 snout einarginate, about 10 prominent spinules on each lobe, teeth on 



