. Catalogue of the fishes in the British Museum. British Museum (Natural History); Fishes. 59. ARITJS. 149 of the head (its own length included), and twice and a half as broad as long. The basal bone of the dorsal spine is quadrangular, slightly narrowed in the middle. ( Vol.) Surinam; Porto Kico. 17. Alius passany. Bagrus passany, Cuv. 8f Vol. xiv. p. 458. D. 1/7. A. 17. Similar to A. proops. The eye is close to the end of the snout and remote from the pras- opercular limb; the lower jaw is the longer. Teeth on the palate and barbels similar to those in A. proops; occipital process shorter th
. Catalogue of the fishes in the British Museum. British Museum (Natural History); Fishes. 59. ARITJS. 149 of the head (its own length included), and twice and a half as broad as long. The basal bone of the dorsal spine is quadrangular, slightly narrowed in the middle. ( Vol.) Surinam; Porto Kico. 17. Alius passany. Bagrus passany, Cuv. 8f Vol. xiv. p. 458. D. 1/7. A. 17. Similar to A. proops. The eye is close to the end of the snout and remote from the pras- opercular limb; the lower jaw is the longer. Teeth on the palate and barbels similar to those in A. proops; occipital process shorter than in that species; basal bone of the dorsal spine subcrescentic. Ventrals longer than pectorals. ( Vol.) Cayenne. 18. Arius caerulescens. D. 1/7. A. 17. P. 1/10. The height of the body is contained about five times in the total length (without caudal), the length of the head thrice and a half or thrice and two-thirds; head much broader than high, its greatest width being three-fourths of its length. Eyes rather small, their diameter being one-half of the extent of the snout, two-sevenths of their distance from the gill-opening, and one-third of the width of the interorbital space. The teeth on the palate form a slightly curved band, composed of two vomerine patches which are much broader than long, and of a pair of palatine patches which are subcontinuous with, scarcely broader and longer than, those of the vomer. The bar- bels of the maxillaries extend to the middle, the outer ones of the mandible to the base of the pectoral. Crown of the head granular; occipital process broader than long, subtri- angular, subtruncated behind, and slightly raised along the median line; the basal bone of the dorsal spine is subtriangular, small. Dorsal spine of moderate strength, more than half as long as the head, granulated in front and slightly serrated behind; the first soft ray is as high as the body. Adipose fin shorter than the dorsal. Caudal deeply forked, with the upper lobe longest,
Size: 2128px × 1174px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorbritishmuseumnatur, bookcentury1900, booksubjectfishes
