The natural history of fishes, amphibians, & reptiles, or monocardian animals . in Brownii, it is a little in advance. PLATYSOMUS Micropteryx {fig. 133.) First dorsal fin entirely wanting^, but the back armedwith four isolated spines ; ventral fin hardly percep-tible ; anal spines entirely third species, which I have named from the extrerae smalbiess of the ventral fin, which nevertheless seemed to have been injured, is not uncommon at Pernambuco, where the fol- lowmg description, and also a drawing, was executed from fresh specimens. Body remarkably thin, destitute of visible sca
The natural history of fishes, amphibians, & reptiles, or monocardian animals . in Brownii, it is a little in advance. PLATYSOMUS Micropteryx {fig. 133.) First dorsal fin entirely wanting^, but the back armedwith four isolated spines ; ventral fin hardly percep-tible ; anal spines entirely third species, which I have named from the extrerae smalbiess of the ventral fin, which nevertheless seemed to have been injured, is not uncommon at Pernambuco, where the fol- lowmg description, and also a drawing, was executed from fresh specimens. Body remarkably thin, destitute of visible scales, and entirely silvered j but the back has a bluish tinge, and the sides reflect pale shades of golden and pink ; all the fins are pale dusky, except the anal, which is yellowish. Irides vel- low ; margin of the head, back, and belly sharp; the latter seems formed by a strong bone, but there are no external spines or internal tubercles ; tongue thin, moderate, and truncated at the tip ; eyes moderate; jaws capa-ble of extension, rough with minute and imperceptible APPENDIX. 407 incurved to the touch; gill aperture large, the membrane of sevenrays; vent nearest the head, and placed beneath the base of the pectoralfins ; back with four long tubercles beneath the skin, commencing abovethe eye, and followed by four movable recumbent, short spines, all placedbefore the dorsal fin; dorsal fin commencing nearest the tail, between theventral and anal fins, pointed or slightly falcate at the forepart, and verynarrow behind—it reaches to the base of the tail—the first ray short andspinous, the rest forked, the third ray the longest; pectoral fin long, greatlyfalcated, and reaching much beyond the vent; ventral fin rather before thepectoral, very minute, having six branched crisped rays, placed immediatelybefore the vent; anal commencing rather before the dorsal, of the sameshape, and terminating in a line with it: the first ray spinous, the restbranched; caudal deeply fork
Size: 2005px × 1246px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubj, booksubjectfishes, booksubjectreptiles
