124 



Anacanthini Pleuronectoidei. 



To the 8 genera and 39 species recorded in the Fauna of British India the 

 " Investigator " has added 8 more genera and 2-i more species. Not all of these, 

 however, belong to the fauna of the deep-sea. 



The following is a synopsis of the genera of Pleuronectidte at present known to inhabit 

 Indian seas. Those that are represented in the depths are marked with an asterisk : those 

 that have recently been added to the Indian fauna by the " Investigator," are marked with a 

 dagger. 



I. Jaws and dentition nearly equally developed on both sides : — 



1. The dorsal fin begins on the neck ... ... ... Psettodes. 



2. The dorsal fin begins in front of the eyes, on the snout : — 



i. Eyes on the left side : lateral line with a curve above 

 the pectoral fin : — 

 a. Eyes not widely separated : teeth minute, equal, 

 in a single series : maxilla about a third the length 

 of the head 

 I. Eyes not widely separated : teeth unequal, in a 

 single series : maxilla nearly half as long as the 

 head 



c. Eyes not widely separated : teeth large, unequal, 

 in a single series : maxilla about three-quarters 

 the length of the head 



d. Eyes separated by a concave space, which is usu- 

 ally of considerable width 



e. Eyes as in Rhomboidichthys : no scales 



Eyes on the left side : lateral line nearly straight 



Eyes on the right side: lateral line nearly straight, 



slightly ascending anteriorly : mouth small 



Eyes on the right side : lateral line with a wide curve 



anteriorly: mouth large 



i 



II. Jaws and dentition much more developed on the blind side : — 



n. 

 iii. 



IV. 



ARNOGLOSSUS.f 



PSEUDORHOMBUS. 



*CHASCAKOPSETIA.t 



Rhomboidichthys. 



PsETTYLLIS-f 

 ClTHARICHTHTS. 



SAMARIS.f 



BKACHTPLEORA.t 



Caudal fin independent : — 



i. Eyes on the left side : lateral line with a curve above 



the pectoral: pectorals well developed 

 ii. Eyes on the right side : lateral line with a curve above 



the pectoral : pectorals well developed 

 iii. Eyes on the right side : lateral line straight : pectorals 

 absent or present 

 Vertical fins confluent with the caudal : — 



Eyes on the right side : pectorals present or absent 

 Eyes on the left side : pectorals absent : — 



a. No lateral line 



b. Two or three lateral lines on the left side 

 with tentacles ... 



c. Two or three lateral lines on the left side 

 without tentacles 



i. 

 ii. 



*L.EOPS.t 

 *BoOPSETTA.f 



Solea and *Achirus. 

 Stnaptura. 



*Al>HORISTIA.t 



ips 



ips 



Pl.AGUSIA. 



*C\'NOGLOSSUS. 



