386 PHILOSOPHY OF ZOOLOGY. 



44. Esox. Pectoral fins of the ordinary size. M. Cu- 

 VIER has given indications of the following sub-genera : 

 1. Esox (E. lucius). 2. Galaxias (E. truttaceus). 3. Mi- 

 crostoma (M. vulgaris, the Serpe microstome of Risso). 

 4. Stomias (E. boa). 5. Chauliodus (E. stomias). 6. 

 Salanx (one new species, Cuv.). 7. Belone (E. belone). 

 8. Scomberesox (E. saurus). 9- Hemiramphus (E. bra- 

 siliensis). 



45. EXOCETUS. Pectoral fins greatly developed, and 

 fitted for temporary flight. E. volitans. 



46. MORMYRUS. Snout produced, mouth small. Gill- 

 flap hid. M. anguilloides. 



CYPRINID.E. Jaws and teeth feeble. The plates of the 

 pharynx thickly set with teeth. Stomach destitute of a 

 pouch, and the intestines without cceca. 



47. CYPRINUS. Mouth small, jaws, tongue and palate 

 without teeth. The gill-flap with three rays. The fol- 

 lowing subgenera have been indicated by CUVJER : 1. 

 Cyprinus* (C. carpio). % Barbus (C. barbus). 3. Gobio 

 (C. gobio). 4. Tinea (C. tinea). 5. Cirrhines (C. cir- 

 rhosus). 6. Abramis (C. brama). 7. Labeo (C. niloticus). 

 8. Leuciscus (C. Icudscus). 9. Gonorhynchus (C. gono- 

 rhynchus). 



48. GOBITTS. Lips fleshy, and fit to act as a sucker. 



Air-bag; contained in an osseous case. G. barbatula. 

 o 



49. ANABLEPS. Iris double, ovoviviparous. A. tetropli- 

 thalmus. 



50. POCEILTA. Three rays in the gill-flap. P. vivi- 

 para. 



51. LEBIAS. Five rays in the gill-flap. L. pacified. 



52. CYPRINODON. Four rays in the gill-flap. C. va- 

 riegatus. 



SILURID^. The maxillaries are greatly reduced or 

 lengthened into filaments. 



