. Catalogue of the fresh-water fishes of Africa in the British Museum. Freshwater fishes. GASTKOSTEUS. 107 1. GASTROSTEUS, Linn. Syst. Nat. i. p. 489 (176G), part. ; Ciiv. it Val. Hist. Poiss. iv. p. 479 (1829) ; Giinth. Cat. Y\<h. i. p. 2 (1859), part. Body moderately elongate. Snout short, not tubiform. Villiform teeth in jaws, none on palate. Dorsal fin with 3 to 11 spines, soft part similar to anal. Pelvic bones united to form a triangular or lanceolate plate between the ventral fins. Vertebnc 29-33. A single species in Africa. 1. GASTROSTEUS ACULEATUS. Linn. S. N. i. p. 489 (17(;C.). T
. Catalogue of the fresh-water fishes of Africa in the British Museum. Freshwater fishes. GASTKOSTEUS. 107 1. GASTROSTEUS, Linn. Syst. Nat. i. p. 489 (176G), part. ; Ciiv. it Val. Hist. Poiss. iv. p. 479 (1829) ; Giinth. Cat. Y\<h. i. p. 2 (1859), part. Body moderately elongate. Snout short, not tubiform. Villiform teeth in jaws, none on palate. Dorsal fin with 3 to 11 spines, soft part similar to anal. Pelvic bones united to form a triangular or lanceolate plate between the ventral fins. Vertebnc 29-33. A single species in Africa. 1. GASTROSTEUS ACULEATUS. Linn. S. N. i. p. 489 (17(;C.). This species, widely distributed in the seas and fr(;sh waters of the cold and temperate ]iarts of the Northern Hemisphere, is represented in the fresh waters of Algeria by the following form, which may be designated as var. alf/eriensis:— Gasterostevs hwms (non C. & V.), Gerv. Zool. Pal. Gen. p. 202, pi. xlv. fi<;. 1 (1809). Gaxterosteiis hravhycentrus (non 0. ct V.), Playf. k Ann. & Jlao-. N. H. (4) viii. 1871, p. 388. GaMerostevs ahjeriensis, Sauv. N. Arch. Mus. x. 1874, p. 17 ; Regan, Ann. & Mag. N. II. (8) iv. 1909, p. 4:57. Fig. G.;.. Gastrosteiis aculeattis, var. ahjeriensis. x Ij. Depth of body H to i times in total length, length of head 3^ to 3i times. Snout as long as or a little shorter than eye, which is 3 to 3^ times in length of head. D. I, I, 111-12 (rarely 1, I, I, I 12); spines rather narrow and feebly denticulated at tlie sides, first and second equal or second the longer, usually measuring less than diameter of eye, first behind vertical of base of pectoral. Anal I 8-9. Ventral spine i to I length of pelvic plate. 1-4 bony plates above the ascending process of the pelvis, body sometimes entirely naked; no lateral keel on the caudal peduncle. Total length 50 millim. Metidja, near Algiers. 1-3G. Ad., ligr., & vg. Ditches in the Metidja. Sir L. Play fair (P.).. Please note that these images are extracted from scanned page images tha
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