172 ZOOLOGY. 



16. Trichopus. Bodij compressed; ventral fins with an 

 extremely long filamenl. 



17. Scarus. Jaws bony, divided in the middle, crenated on 



the edges ; teeth connate, and conglomerate. 



1 8. Sparus. Gilt-Head. Body compressed ; fore-teeth 

 sharp; g-nnJer* flat; gill-membrane fire rayed; gill- 

 covers scaly ; dorsal fin extending the whole length of 

 the back ; tail forkedt 



> 



19. Gomphosus. Jaws lengthened into a tubular snout • 

 teeth smallj the front ones longer. 



20. Labrus. Wrasse. Teeth conical, long; one tubercU' 

 lated bone in the bottom of the throat, two abovej oppo- 

 site to the other ; dorsal fin extending the whole length 

 of the back, with a slender skin extending beyond the 

 points of each ray ; tail rounded ; gill~covers scaly, 

 the membrane from four to six rayed. 



21. Ophicephalus. Head covered with dissimilar scales; 



body elongated. , 



22. Lonchiurus. The ventral placed before the pectoral 

 finsy separate ; tail lanceolate ; head scaly. 



23.* ScioBna. Head covered with scales, which strongly ad- 

 here ; teeth sharp, incurvated ; gill-membrane gene- 

 rally six rayed, the gill-covers scaly ; dorsal fins twO; 

 in some species concealed in a longitudinal cavity. 



