138 



CYCHLA. 



In the " Brazilian Fishes " we have two forms of 

 Cychla represented, one of a lengthened form, strong 

 lips, and a long dorsal fin ; the other of a deeper 

 form, with the dorsal fin undulated where the sepa- 

 ration takes place, in these fishes having that mem. 

 her divided, and having the body marked with 

 conspicuous ocellated spots or markings. The ex- 

 amples will be noticed in succession, but we give 

 first the characters of Agassiz, which agree best 

 with the first or lengthened form, resembling that 

 of Latilus or Pinguipes, but with a short anal fin. 



" CYCHLA, Agassiz. Corpus elongatura, subcompressum, 

 squamis minoribus obductum. Linea lateralis inter- 

 rupta. Caput productum, subacuminatum. Operculum 

 poetice accuminatum, suboperculum postice prolonga- 

 tum, nee non buccae squamatae. Os magnum surdum 

 subinflexum ; ossa intermaxillaria ambitum oris superi- 

 orem totum sustinentia valde protractitia, ut et mandi- 

 bularia fascia lata dentium velutinorum obsita. Pharynx 

 neque dentibus velutino armatus. Membrana bran- 

 chiostega radiis 5. Pinna dorsalis longa ; pars ejus an- 

 terior aculeata posteriore molli longior. Pinna analis 

 brevis. Pinna caudalis rotundata." 



The annexed Plate, taken from the fishes of 

 Spix and Agassiz, will exhibit this form. There 

 is an uncoloured drawing in the Collection, which 

 we venture to refer to it, though that represented 

 on the former is said to inhabit the Brazilian sea. 



