Jordan and Evcrmann. — Fishes of Nortli A)neriia, 1929 



aual ray eijuals least height of tail and is slightly more thau \ that of fifth 

 to eighth, which are longest, the last ray \ as long as orbit; vent nearly 

 midway between origin of ventrals and that of aual; candal distinctly 

 eniarginate when fully expanded, the length of middle rays 9 times, and 

 that of the external rays 7fo times in length of body. The structure of 

 the pectoral is similar to that in Tri(j\op» inmu'li, but the longest of the 

 essertcd lower rays extends considerably farther back than the upper por- 

 tion of the fin. The origin of the pectoral is directly under that of the 

 spinous dorsal. The length of the longest exserted ray (eleventh) is con- 

 tained 4^ times in the standard body length. Five of the lower pectoral 

 rays are modified. The tenth pectoral ray, which is the longest of thenon- 

 exserted portion, is only about % as long as the eleventh and extends to near 

 jhe end of the spinous dorsal. The ventral is situated farther in advance 

 than in Triglops jtiwjd'x, and does not quite reach to the vent when extended. 

 Its length is contained nearly 12 times in the unit of length. Colors: 

 There are traces of the same I bars which orn.ament the back and sides of 

 TrigJops piiu/cU, but the dorsal portion of the markings is very faint and 

 the lower limits of the dark areas are the most intense and form a succes- 

 sion of elongate blotches along the median line of the body, partly below 

 and partly on the lateral line ; dorsal fins with 3 series of dark spots on 

 the rays and spines, but not on the connecting membrane; these spots 

 forming broken bauds which are obli(iue on the first dorsal and nearly 

 horizontal on the soft dorsal when the tins are raised ; a crescent-shaped 

 broken baud crosses the top of the body at the ninth dorsal spine: a 

 short, dark blotch near the root of the pectoral on the tenth, eleventh, 

 and twelfth rays; another dusky blotch in the upper axil of the pectoral; 

 4 dusky bars on the pectoral, tlio first of which is very short, involving- 

 only about 5 of the rays, the second and third extending to the first 

 exserted ray, and the fourth, which is near the tip of the fin, extending on 

 the 7 upper rays only; caudal dusky at the base and with 4 bars, the 

 first of which is faint in the middle and the last interrupted by the emar- 

 gination of the fin; lips and ui)per portion of the maxilla dusky;, a dark 

 blotch on the interoperculum ; membrane lining the iuuer surface of the 

 operculum dusky; A'entrals and anal whitish. Length 172 mm. (Bean.) 



Concerning this species Dr. Gilbert observes : 



"The elongation of the lower exserted i)ectoral rays, and the 'serrations' 

 (i. e., minute spinous scales) on the fin rays, are characters which I'rionh- 

 tiiis shares with related species of Triylops. The slenderuess of the body, 

 the emargination of the caudal tin, and the elongate dorsal and anal fins 

 are present and the two former carried to an extreme in EJanura forfii'uia. 

 In addition to these characters, P^■o)((s^^*(s has the breast naked and the 

 dorsal region without the usual series of enlarged plates." 



Three specimens, 77 to 87 mm. long, were secured at stations south of 

 Sannak and north of Unimak Islands, Alaska, at 38 and 56 fathoms. The 

 ventral fins seem to be not more advanced in position than in the other 

 species. In other respects these fjpecimens agree well with Bean's admira- 

 bly full description. Aleutian Islands, south to British Columbia; not 

 rare. (maceUun, diminutive of maccr, slender or thin.) 

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