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Show 384 MR. 0. TATE REGAN ON [Apr. 10, 65 mm. in total length, one received from the Copenhagen Museum as T. trinitatis*. Gill's description of T. tceniurus is, so far as it goes, perfectly applicable to T. trinitatis, and there can be but little doubt of their identity. This species is known only from Trinidad. 5. TETRAGONOPTERUS GUPPYI, sp. n. (Plate XXI. fig. 1.) " Mountain-stream Sardine." Depth of body 3-3^ in the length, length of head 4|-4I. Snout shorter than eye, the diameter of which is 3-3h in the length of head and less than the interorbital width. Maxillary extending a little beyond the vertical from the anterior margin of eye, with a series of small teeth. Scales 38-40 ^Ji, 5^ to 6| between lateral line and root of ventral fin ; lateral line complete. Dorsal 10, with 8 branched rays, its origin a little nearer to tip of snout than to base of caudal; anterior rays longest, shorter than the head. Anal 29-32, with 26 to 29 branched rays. Pectoral extending to or a little beyond the base of ventral; ventrals originating in advance of the dorsal, extending nearly to the anal. Caudal forked. Caudal peduncle as long as deep. Silvery, back dark greenish; traces of a dark humeral spot; a blackish longitudinal band on the middle caudal rays ; caudal lobes yellow. Five specimens, 65-85 mm. in total length. This species is allied to the preceding and also to T. wappi Cuv. &, Val., which has a much larger head. " Found in clear pebbly brooks with rapid current and plentiful in the Glenside Estate Stream, at the foot of the Northern Range of hills." 6. TETRAGONOPTERUS MACULATUS L. " Pink-finned Sardine." " By far the commonest of the Sardines; they swarm in the Maracas River, which is clear and at times very rapid. " Colour: Silvery, back darker; a dark humeral spot and a blackish spot at the base of caudal; fins bright pink." Hab. Brazil; Guiana ; Venezuela. 7. TETRAGONOPTERUS (HEMIGRAMMUS) UNILINEATUS Gill. (Plate XXII. fig. 5.) " Sardine Doree." Depth of body 2|-2J in the length, length of head 4. Snout much shorter than eye, the diameter of which is 2^ in the length of head and slightly greater than the interorbital width. Maxillary extending slightly beyond the vertical from the anterior margin of eye, with a series of minute teeth. Scales 32-35 ~,t, 44-5.^ be-tween lateral line and root of ventral fin; lateral line on 9 to 12 # Lutken, Vid. Medd. 1874, p. 234. |