PISCES THORACICI. ZEUS. 
45 
ZEUS. 
GENERIC CHARACTER. 
Caput compressum , declive : labium superius 
membrana transversafornicatum. Lingua 
subidata. 
Membrana branchiostega radiis vii. perpen- 
dicularibus; injimo transverso. Corpus 
compressum, tenue, splendens. 
The head compressed, declivous: the 
upper lip arched (furnished with a 
membranous velum attached before, 
and loose behind). The tongue awl- 
shape. 
Seven perpendicular rays in the branchial 
membrane, the lowest transverse. The 
body compressed, thin, splendent. 
No. LVII. 
Zeus corpore sub-rhomboido ; radiis quibusdam pinnce dorsalis, ventralis, cinique , longioribus , in 
setas longissimas coadunatis ; cauda projunde bifida , 
The Zeus with a body somewhat rhomboid ; several rays in the dorsal, ventral, and anal 
fins, uniting respectively, form very long setaceous tails; the caudal fin deeply 
divided. 
Tjus Callus , Linn. S. N. p. 45 4. 
Called by the Natives Gurrah Parah. 
5 J__ 
JB. vii. D. 25. P. 17. V. 6. A. 18 . C. 22. 
The body nearly rhomb-form, compressed, very thin, without scales, smooth, shining. 
The head large, declivous, much compressed, front very steep, and carinate; the nose large, emarginate. 
The mouth low, terminal, oblique, wide. The jaws nearly of equal length, extractile, feel to the finger like a 
file; the lips thin. 
Teeth hardly visible, minute, set in many rows. Tongue short, linear, free, smooth. Palate tuberculate. 
The eyes middle, at the root of the nose, close together, round, large, flat. Nostrils small, oval, between the 
orbit and the nose. 
The opercula oblong, rounded, smooth, moveable; branchial membrane small, covered; the aperture large, 
lunated. 
The trunk. The back arched, carinate; the sides much compressed; the throat and belly straight; the pos¬ 
terior part of the tail almost round, and very small. The lateral line forms an arch above the pectoral fin, 
and then runs straight to the tail, being carinate towards its termination. The anus near the throat. 
The Jins. The dorsal assurgent and declining ; five short spines compose the first five rays; the next five 
are very long, and joining together form a setaceous tail, between six and seven inches in length; the next 
four rays are also long and setaceous, but shorter; the rest of the fin is low, equal, with eleven fibrous rays. 
The pectoral, middle, moderate length, and falcate; the ventral near the anus, the second and third rays the 
