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'ENDEAVOUE" SCIENTIFIC EESULTS. 



of two flattened, denticulated spines, while that of the outer 

 is armed with smaller simple spines. Both lower borders- 

 finely denticulated. Operculum narrow, its anterior half 

 covered with scales, the posterior portion with coarse striae- 

 ending in marginal points ; two strong spines on the upper 

 portion of the bone. Subopercle with one or two small spines- 

 at its lowest point. Interoperculum with a broad notch near 

 its junction with the subopercle, its angle and lower border 

 striated and finely denticulated. Margin of the suprascapular 

 denticulated, its lower portion with an oblique ridge terminat- 

 ing in some enlarged spines. 



Nostrils more widely separated than in A. affinis, the hinder 

 ones being very close to the orbital margins. First bran- 

 chiostegals very slender, second to fifth broad and denti- 

 culated below, the others smooth. Gill-rakers very long and 

 slender posteriorly, about half as long as the eye ; twenty-two 

 on the lower limb of the first arch. Exceedingly fine villiform 

 teeth on the jaws without larger ones near the middle. A 

 small triangular patch on the vomer and a long cuneiform 

 band on each palatine bone. 



With the exception of the form of the ridges on top of the 

 head, the position of the nostrils and the absence of enlarged 

 teeth, all the characters of the head are almost exactly similar 

 to those of young A. affinis. 



Dorsal spines gradually increasing in length, the last ij-i^ 

 as long as the eye and f the length of the second ray ; all are 

 more or less angular and striated. Second ray the longest, 

 about 2^ as long as the last. The first anal spine is placed 

 below the third dorsal ray, the fourth equals the fifth dorsal 

 spine in length and is about | as long as the second ray ; the 

 last ray is placed far behind that of the dorsal. Pectoral not 

 quite f in the head and reaching to above the base of the 

 anterior anal rays. Ventrals with strong, flattened, striated 

 spines, f as long as the rays which extend to the base of the 

 fourth anal spine. Caudal deeply forked, the lobes somewhat 

 pointed and about equal to the head in length. 



All the scales rather coarsely denticulated, the external half 

 of their exposed surfaces with smooth ridges ending in mar- 

 ginal teeth. Bases of the dorsal and anal fins protected by 

 sheaths formed of several rows of scales, the outermost of 

 which is the largest. A small patch of scales on the cheeks. 

 A large angular scale at the axil of the ventral fin. Lateral 

 line straight, each scale with a median excavation. 



Colourless in formalin. 



Described from twelve specimens, 150-200 mm. in length. 



