xra 



PHYLUM CHORDATA 



215 



The right and left bars of the fifth branchial arch are usually not 

 fused. 

 This immense group includes the greater number of marine 



FIJ. 839. Ssbastesparcoides. br. m. branchiostegal membrane; d. f. spiny portion T ui' 

 dorsal (in ; d. /'. soft portion ; me. maxilla ; op. opercular ; pet. f. pectoral tin ; i>.mr. pre- 

 maxilla ; pr. op. pre-opercular ; pa. f. pelvic fin>; v.f. spiny portion of ventral lin ; c. /'. soft 

 portion. (After Richardson.) 



fishes (Fig. 889), as well as many fresh-water forms : the Perch, 

 Stickleback, Sea-bream, Mullet, Mackerel, and Gurnard may be 

 specially mentioned. 



Sub-order d. Pharyngognathi. 

 Teleostei in which the right and left bars of the fifth branchial 



Fio 



. 890. Labrichthys psittacula (Wrasse), d. f. hard dorsal fin; d./'. soft dorsal, l]>. 

 lips ; pct.f. pectoral fin ; pv. f. pelvic lin ; v.f. ventral tin. B, inferior pharyngeal bom. 1 of 

 Labrichthys. (A, after Richardson ; B, after Owen.) 



o 2 



