. Catalogue of the fishes in the ... Museum. 146 . longest, its length being ono-iifth of the total. Pectoral spine ser- rated along both edges, longer and stronger than that of the dorsal. Ventral fin shorter than pectoral. All the fins black. Guatemala. a. Twelve inches long. Guatemala. Purchased of Mr. Frank. h. Fine specimen, 13 inches long. Chiapan. From the Collection of Messrs. Godman and Salvin. 12. Arius assimilis. D. 1/7. A. 19. P. VIO- The height of the body is contained four times and two-thirds in the total length (without caudal), the length of the head thrice and thre
. Catalogue of the fishes in the ... Museum. 146 . longest, its length being ono-iifth of the total. Pectoral spine ser- rated along both edges, longer and stronger than that of the dorsal. Ventral fin shorter than pectoral. All the fins black. Guatemala. a. Twelve inches long. Guatemala. Purchased of Mr. Frank. h. Fine specimen, 13 inches long. Chiapan. From the Collection of Messrs. Godman and Salvin. 12. Arius assimilis. D. 1/7. A. 19. P. VIO- The height of the body is contained four times and two-thirds in the total length (without caudal), the length of the head thrice and three-fifths ; head much broader than high, its greatest width being three-fourths of its length. Eyes rather small, situated nearer to the end of the snout than to that of the operculum; the length of the snout is three-fifths of the width of the interorbital space. The median longi- tudinal fonticulus on the upper side of the head does not extend to the base of the occipital process. Teeth on the vomer but slightly separated in the middle, forming a pair of oblong transverse patches which are confluent with those on the palatine bones ; the latter are short, club-shaped. The band of intermaxillary teeth is five times as broad as long. All the teeth villiform. The maxillary barbels extend nearly to the end of the head ; the length of the outer ones of the mandible is one-half or two-thii-ds of that of the head. Crown of the head granular, the granulations being arranged in radiating streaks. Occipital process broader than long, triangular, with its hinder end concave. The basal bone of the dorsal spine of moderate size, crescent-shaped. Dorsal sjnne of moderate strength, more than half as long as the head, granidated in front and slightly serrated behind; the first soft ray is longer than the spine and as high as the body. Adipose fin shorter than the dorsal. Caudal deeply forked, with the upper lobe longest, its length being contained five times and a half in the total. Pectoral
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Keywords: ., bookauthorgntheral, bookcentury1800, bookdecade1860, bookyear1864
