PCECILOPSETTIN^ 387 



Subfamily 2. P(ECILOPSETTIN/E. 



Close to the Pleuronectinae, but the olfactory laminae are expanded distally and 

 radiate from a short central rachis ; lateral line rudimentary or absent on blind side 

 of body. 



Three genera from tropical and subtropical seas. Mostly fishes of small size an<l 

 rather fragile appearance. 



Synopsis of the Genera. 

 I. None of the anterior rays of dorsal or pelvics prolonged ; male similar to 

 female. 



A. No orbital tentacles ....... 28. PoiCilopsetta. 



B. Each eye with a tentacle ....... 29. Nematops. 



II. Anterior rays of dorsal and of pelvic of ocular side more or less prolonged 



in both sexes, very long in male ; male with strong rostral spines, and with 

 the teeth on ocular side of upper jaw extending on to outer surface 

 of jaw ......... 30. Marleyella. 



Neoetropvs may belong to this subfamily (see p. 283). 



Genus 28. PCECILOPSETTA. 



Pcecilopsetta, Gunther, 1880, Shore Fishes "Challenger", p. 48 [Pa'cilopsetta colonila, GiirHiiGr] ; 



Hubbs, 1919, Proc. Biol. Soc. Washington, xxxii, p. 163 ; Norman, 1931, Treubia, xiii, p. 423. 

 Boopsetta, Alcock. 1896, J. Asiat. Soc. Bengal, Ixv (2), p. 305 ; Alcock, 1899, Cat. Indian Deep-Sea 



Fish., p. 126 [Boopsetta umbrarum, Alcock]. 

 Alaeops, Jordan and Starks, 1904, Bull. U.S. Com. Fish., xxii, (1902), p. 623 ; Jordan and Starks, 



1906, Proc. U.S. Nat. Mus,, xxxi, p. 198 [Alaeops plinthus, Jordan and Starks]. 

 Paralimanda, Breder, 1927, Bull. Bingham Ocean. Coll., i (i), p. 86 [Paralimanda ineimis, Breder]. 



Male similar to female. Body ovate or rather elongate, strongly compressed, often 

 fragile. Eyes on the right side, contiguous or separated by a very narrow space. 

 Male without rostral spines. Mouth rather small, nearly symmetrical, the length of 

 the maxillarj' less than i that of head ; teeth small, villiform, in one or two rows or 

 in narrow bands in the jaws ; dentition better developed on blind side of jaws ; vomer 

 toothless. Gill-rakers rather short, pointed, few in number ; lower phar\'ngeals 

 rather narrow, separated for the greater part of their length, each with 2 or 3 rows of 

 sharply pointed teeth. Dorsal fin with 56 to 68 rays, commencing well behind nostrils 

 of blind side and above eye ; nearly all the rays simple, not scaled ; anterior rays 

 not prolonged ; a low scaly sheath covering basal part of fin on ocular side. Anal 

 with 45 to 58 rays ; similar to dorsal ; tip of first interhsemal spine not projecting in 

 front of fin. Pectoral fins unequal, that of ocular side larger, with 7 to 12 rays. 

 Pelvic fins with 6 rays, short-based, subequal, but somesvhat asymmetrical, that of 

 ocular side further forward and closer to median line than that of blind side ; none of 

 the rays prolonged. Scales of moderate or small size, rather feebly ctenoid or cycloid 

 on ocular side, cycloid on blind side. Lateral line on ocular side well developed, extend- 

 ing on to the caudal fin, with a large flat-topped curve above the pectoral fin ; no 

 supratemporal or suborbital branches ; lateral line of blind side rudimentary or absent. 

 Vent nearly median. 



Seven species from deep water in the North Atlantic and Indo-Pacific. 



