172 PROCEEDINGS OF THE ACADEMY OF [Feb., 



the rays. The origin of the anal is much nearer the base of the caudal 

 than the tip of the snout. Caudal broad, somewhat truncate, and the 

 lower rays the longest. Pectoral broad, also rather truncate. Ven- 

 trals close together, inserted about opposite the last third of the space 

 between the posterior margin of the eye and the margin of the gill- 

 opening. 



Color in alcohol more or less dark slaty-blue, giving place to dark 

 brown. The posterior half of the trunk shading into dusk3% A black 

 band, at first about half or a little less than the e\^e-diameter, running 

 from the snout through the eye and back along the upper part of the 

 side out on the caudal till near the tips of the lower median rays, 

 and then curving down or bent back a trifle. From above the origin 

 of the anal this band becomes much broader, occupying most of the 

 upper portion till about as broad as the interorbital space. Belly 

 and lower surface rather pale. A short dark brown oblique streak 

 before the base of the pectoral. Margins of the dorsal, anal and caudal 

 whitish, that of the latter very broad, especially at the corners. On 

 the former two fins there is a narrow submarginal ' blackish band, 

 fading below toward the basal portions of these fins into the bluish 

 body color. Pectoral and ventral pale Ijrown. 



Length 3^ inches. 



Type No. 24,207, Acad. Nat. Sci. Phila. Zanzibar. Coll. Sir 

 Charles Eliot. 



The only example I have seen is described above. It is closely 

 related to Aspidontus taeniatus Quoy and Gaimard. It differs, however, 

 in the short dark streak in front of the base of the pectoral. Their 

 figure is very rough, and shows the outer portions of the upper and 

 lower caudal rays bluish.* 



Dr. Giinther's figiu'e of Petroscirtes tceniatus.'' if at all accurate, is 

 c ertainly distinct. 



{Tractus, a streak.) 



ANTENNARIIDJE. 

 8. Antennarius argus sp- nov. Plate Vni. 



Head (measured \o axil of pectoral) 2f; depth 1; D. I-I-I-12; 

 A. 7; P. 10; V. 5; width of head (measured to axil of pectoral) l^ in 

 its length; snout 4^ in head; eye about S; maxillary 2; mandible 2; 

 width of mouth If; interorbital space 3; bait 2\; second spine 3^; 



■* Voyage de V Astrolabe, Zool., 1S34, p. 719, Plate 19, fig. 4; I'ile de Guam, devaiit 

 la ville d'Agagna. 



•=• (Fische der Siidsee) Journ. Mus. Godef., XI, 1876, p. 195. Plate 114, fig. A; 

 Freundschafts-, Paumotu- und Fidschi-Inseln. 



