BOTHIN^ 173 



Pseitina, Engyprosopon, Crossorhombus, Bothus, Parabothus and Gramma lobothiis, into 

 a single genus (Bothus). When dealing with all the Indo- Pacific species, however, 

 together with those from Europe and America, such a genus would assume very 

 clumsy proportions. Practically all the species fall readily into one or other of the 

 genera defined in the abo\e synopsis, and it is only some 3 or 4 species, most of 

 them known from only a single example or from specimens of one sex only, whose 

 systematic position is more difficult to determine. 



Genus 22. ARXOGLOSSUS. 



r Peloria, Cocco, 1S44, in Krohn, Giom. Gabin. Messina, Ann. iii, v (xxv), p. 21* {Peloria heckeli, 



Cocco]. 

 Arnoglossus, Bleeker, 1862, \"ersl. .Akad. Wet. Amsterdam, xiii, p. 427 [PUuronecies arnoglossus, 



Schneider] ; Norman, 1931, Ann. Mag. Xat. Hist., (10) viii, p. 599. 

 Bascanius, Schiodte, 1868, Natur. Tidsskrift, (3) v, p. 275 [Bascanius tadifer, Schiodte]. 

 Aiilicitharus, Giinther, 1880, Shore Fishes " Challenger", p. 47 [Anticitkarus polyspilus, Giiother]. 

 Cliarybdia, Facciola, 1885, Nat. Sicil., iv, p. 265 [Peloria rueppellii, Cocco]. 

 Caulopsetta, Gill, 1893, Mem. Nat. Acad. Sci. Washington, vi, p. 124 [Pleuroncctes scaphus (Forster) 



Schneider]. 

 KyUia, Chabanaud, 1931, Bull. See. zool. Fr., Ivi, p. 393 ; Chabanaud, 1933, Mem. Soc. Sci. Nat. 



Maroc, xxxv, p. 49 [Arnoglossus tkori, Kyle]. 

 Dollfusina, Chabanaud, 1933, Mem. Soc. Sci. Nat. Maroc, xxxv, pp. 31, 44 [Peloria rueppellii, 



Coccoj. 



Body ovate or rather elongate, compressed. Eyes on the left side, separated by a 

 bony ridge or narrow concave space, the interorbital region similar in both sexes. 

 No rostral or orbital spines. Olfacton,' laminae few or in moderate number, arranged 

 transversely to or radiating from a central rachis of varying length. Jlouth of 

 moderate size or rather small, the length of the maxillary 2 to 3^ in that of head ; 

 jaws and dentition about equally developed on both sides : teeth small or of moderate 

 size, slender, sharply pointed, sometimes enlarged and canine-like anteriorly, uniserial 

 in both jaws ; vomer toothless. Gill-rakers comparatively few in number, generally 

 rather slender and of moderate length ; lower pharyngeals each with a single series 

 of sharply-pointed teeth. Dorsal fin commencing above nostrils of blind side and 

 well in front of eye ; all the rays simple, generally scaled (at least on ocular side). 

 Tip of first interhaemal spine not projecting in front of anal fin. Pectoral fins unequal, 

 that of ocular side larger ; all the rays simple. Tip of pelvic bone projecting down- 

 wards and backwards between the pelvic fins. Scales small or of moderate size, 

 feebly ctenoid or cycloid on ocular side, generally cycloid on blind side ; no supple- 

 mentary scales. Lateral line developed only on ocular side of body, with a distinct 

 curve above the pectoral fin ; no supratemporal branch. Vent on bhnd side, above 

 anterior ray of anal fin. 



About twenty-four species from the Atlantic coasts of Europe and Africa, the 

 Mediterranean, and the Indo-Pacific. 



Synopsis of the Species. 

 European and African Species. 

 I. Dorsal 73—80, anal 51-57. 



A. About 50 scales in lateral line ; second ray of dorsal prolonged ; eye 



about 3i in head . . . . . . . i. grohmanni. 



B. 38 to 40 scales in lateral line ; second ray of dorsal not prolonged ; 



eye about 4^ in head ........ 2. kessleri. 



II. Dorsal 81-106, anal 62-82. 



A. Dorsal 81-93 (9^). anal 62-74 '■ ^f^ ii to 5^ i" head. 



I. Second ray of dorsal prolonged in both sexes; maxillary 2 J to 



about 3, lower jaw about 2 in head ..... 3. thori. 



^ Teste Facciola, 1885. 



