394 PHILOSOPHY or zoology. 



(B.) Head anned \vith spines. 



118. Perca. Gape wide. Ventrals thoracic. 1. Perca 

 {Jiuviatilis). 2. Centropomus {P. nilotica). 3. Enoplo- 

 sus {ChcBtodon armatus). 4. Prochilus {ScieE?ia macro- 

 lepidota). 5. Lucioperca (L. vulgaris). 6. Terapon 

 {Hocenirus servus). 7. Apogon {Mullus imberbis). 



119. Sci.EXA. Nasal and suborbital bones swollen and 

 cavernous. 1. Cingla (Perca zingel). 2. Umbrina (iS*. 

 cirrhosa). 3. Lonchurus L. harbatus). 4. Scisena (aS*. 

 timbrd). 



The following genera likewise belong to this group: 

 120. Pogonias (P. Jasciatus). 121. Otolithes (Johnius 

 ruber). 122. Ancylodon {Lonchurus ancylodon). 123. 

 Percis (Scieena cylindrica). 124. Trachinus {T. draco). 



c. Head armed with a coat of mail, by the extension and 

 hardness of the suborbitar bones. 



125. Uranoscopus. Head nearly cubical, and the 

 eyes with a dorsal aspect. U. scaber. 



126. Trigla. This genus has been subdivided. 1. 

 Trigla {T. hirundo). 2. Peristedion {T. cataphracta). 

 3. Dactylopterus (7*. volitans). 4. Cephalacanthus (Gas- 

 terosteus spinarilla). 



The following genera belong to this group: 127. Mo- 

 NocENTRis {M. carinata). 128. Cottus. 1. Cottus (C 

 gobio). 2. Aspidophorus {Cottus cataphractu^). 3. Pla- 

 tycephalus {P. spalida). 



d. Skin smooth, bones soft, and the pectoral fins sup- 

 ported on stalks. Gill openings small behind the pectorals. 



129. LoPHius. 1. Lophius {L. Piscatorius). 2. An- 

 tennarius {L. histrio). 3. Malthe (L. vespertiUo). 



(V.) Scomberoidae. Scales small, often scarcely percep- 

 tible, unless at the extremity of the lateral line, where they 

 sometimes form a ridge. In oilier cases, this ridge is form- 



