PHTSTTS. 



Suborder II. HYPO T \l E M F. 

 Gill-openings ventral, below the base of the pectoral fin. 



Fam. 1. PRISTID.E. 



Mouth inferior. Snout produced into a long flat lamina armed with 

 a series of strong teeth along each edge. No nictitating membrane ; 

 spiracles present, large ; 5 gill-openings. Body moderately depressed, 

 elongate. Two dorsal fins, no anal ; caudal of the heterocercal type. 



1. PRISTIS. 



Latham, Tr. Linn. Soc. ii. 1794, p. 27G ; Miill. & Henle, Plagiost. p. 105 (1841) ; 

 A. Dnm. Hist. Poiss. i. p. 471 (18G5) ; Giinth. Cat. Fish. viii. p. 436 (1870). 



Mouth transverse, nearly straight; teeth minute, obtuse, pavement- 

 like. First dorsal fin opposite or close to the base of the ventrals. 



Seas of the temperate and tropical regions, some species ascending 

 rivers. 



1. PRISTIS PERROTETL 

 Miill. & Henjp, t.c. p. 108 : A. Dmn. t. c. p. 474 ; Peters, Re'se Mossamb. iv. p. \) 

 (18G8) ; Giinth. t. e. p. 4:;6 ; Day, Fi<h. Ind. p. 729, pi. cxci. fig. 1 (1878). 

 17-21 pairs of rostral teeth, not trenchant behind, and distant from 

 one another. First dorsal originating in advance of ventrals, second not 



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Pfisiis jierrotetl. 

 Iiidiim Ocean, after Day (Fi>li. Ind.). i. 



much smaller. Root of pectoral in advance of first gill-opening. A 

 small lower caudal lobe. Uniform greyish. Reaches a length of 

 3 metres. 



b2 



