PAHETROPLUS. 



505 



Two species 



]). XVIII-XX 11-14 ; A. IX-X 9-11 ; Se. :}5- 



37 *^ LP. damii, Blkr., p. 505. 



D. XVI-XVIIT 17-18: A. VIl-IX 13 U; 



ISc. 32-34 



4-0 

 14^ 



2. P. polyadis, Blkr., p. 506. 



1. PARETROPLUS DAMII. 



Bleek. t. c, p. 313, and Poiss. Madag. p. 13, pi. iv. fig. 3 (1875); Suuv. op. cit. 

 p. 446, pi. xlvi. fig. 1 ; Bouleng. 1. c. ; Pellegr. 1. c. 



Depth of body hardly twice in total length, length of head 3 times. 

 Head twice as long as broad ; snout strongly compressed, twice as long 



Fijr. 3")0. 



I\iretroph(S dctmii 

 lincriiia, r.. 



as eye in adult ; eye 4 J times in length ot head, 1^ times in interorbital 

 width ; mouth extending to between nostril and eye ; four series of 

 scnles on tlie (dieek, depth of scaly part e(pial to diameter of eye. Gill- 

 rakers short, 12 on lower i)art of anterior arch. J)()rsal X^"III-XX 

 11-14; last spine longest, f length of liead, shorter than soft ravs. 

 Anal IX-X 9-11 ; last spine slightly longer than longest dorsal. 

 Fectornl not quite ^ length of head. \'entral reaching anal. Caudal 

 ft-ebly emarginate. Caudal }>edini(le twice as deep as long. Scales 



