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Show 1881.] THE S U R V E Y O F H.M.S. 'ALERT.' 21 striking differences, which will be mentioned in the subsequent description. The fish is evidently habitually living at a greater depth than that at which Dr. Coppinger happened to obtain the single specimen in his collection. 17. MELANOSTIGMA GELATINOSUM. (Plate II. fig. A.) The whole body is enveloped in a loose delicate skin, like Liparis. Head large, deep, compressed, with obtuse snout. Eye large, two sevenths of the length of the head, and longer than the snout. Cleft of the mouth rather oblique, but the lowe*- jaw does not project beyond the upper. Lips not fleshy. Inside of the mouth, gill-openings, and vent black. The gill-opening is reduced to a very narrow foramen above the base of the pectoral fin. The origin of the dorsal fin and the root of the pectoral are enveloped in the loose skin of the body. The dorsal fin seems to commence above the middle of the pectoral, is low at first, but becomes considerably higher posteriorly. Pectoral very narrow, consisting of a few rays only. Upper parts tinged with a purplish grey ; sides marbled with the same colour, which towards the end of the tail becomes more intense, almost black. Total length of the specimen 5| inches; distance of the snout from the gill-opening -|, from the vent 1-J-. The specimen was obtained on January 15, 1880, at Tilly Bay, in the Straits of Magellan, in 24 fathoms. 18. HIPPOGLOSSINA MACROPS, Steiudachn. Trinidad Channel. 19. HIPPOGLOSSINA MICROPS, sp. n. D. 72. A. 56. V. 1/5. The height of the body is contained twice and one third in the total length (without caudal), the length of the head thrice and one half. The eyes are, compared with those of Hippoglossina macrops, small, equal to the length of the snout, and two ninths of that of the head ; the upper is slightly in advance of the lower; the space between them is flat, half as wide as the vertical diameter of the eye, and covered with minute scales. Mouth wide, the maxillary extending beyond the middle of the orbit. Anterior curve of the lateral line semicircular. Dorsal fin commencing above the eye, of moderate height; pectoral fin half the length of the head; ventrals well developed, symmetrically placed, greyish, finely mottled with brown. A single specimen, 4 inches long, was obtained on the west coast of Patagonia. 20. GALAXIAS ATTENUATUS, Jen. Puerto Bueno. 21. GALAXIAS COPPINGERI, sp. n. D. 12. A. 17. Body elongate, its depth in front of the dorsal being one tenth of the total length (without caudal); the length of the head two ninths. Snout rather broad, with the jaws equal in length ; cleft of the mouth rather narrow, the maxillary extending to below the front margin of the orbit. Eye rather large, a little |