124 



Anacanthini Pleuronedoidei. 



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

 " Investigator " has added 8 more genera and 24 more species. Not all of these, 

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



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

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

 tliat 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 



2. Tlie 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 

 h. 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 Bhomboidichthys : vo scales 



ii. Eyes on the left side: lateral line nearly straiglit 

 iii. Eyes on the right side : lateral line nearly straight, 



slightly ascending anteriorly: mouth small 

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

 anteriorly: mouth large 



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



1. Caudal fin independent : — 



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



the pectoral : pectorals well developed 

 ii. Eyes on tlie 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 



2. Vertical fins confluent with the caudal : — 



1. 

 ii. 



Eyes on the right side : pectorals present or absent 

 Eyes on the left side : pectorals absent : — 

 a. No lateral line 

 6. Two or tluee lateral lines on the left side : 



with tentacles ... 

 c. Two or three lateral lines on the left side : 

 without tentacles 



lips 

 lips 



PSETTODES. 



ARNOGLOSSUSf 



PaEUDORHOMBUS. 



*CHASCANOPSETTA.t 



Rhomboidichthvs, 



PsETTTLLIS.f 

 CiTHARICHTHTS. 



SAMARIS.f 

 BRACHYPLEURA.t 



*Li:ops.t 



*B00PSETTA.t 



SoLEA and *AcHiRus. 



Synaptuka. 



*Aphoristia.| 



Pi.agusia. 



*Cynoglossus. 



