122 FLATFISHES (HETEROSOMATA) 



I am indebted to the Director of the Museo Nacional de Historia Natural. Buenos 

 Aires, for a photograph of the type-specimen of Hippoglossina notata, preserved in 

 that institution. This is in very poor condition, but appears to be identical with the 

 specimens described above. 



Cenus 9. T.-ENIOPSETTA. 



ianiopsetta, Gilbert, igoj, Bull. U.S. Com. Fish., xxiii (2), (1903), p. 68(1 [Tamopsclla rndula, 

 Gilbert.] 



Body rather deep, greatly compressed. Eyes on the left side, separated by a 

 ridge. Olfactory laminae reduced to 3 or 6, slightly radiating, without central rachis. 

 Mouth rather small, the length of the maxillary less than J that of head : jaws and 

 dentition about equally developed on both sides ; teeth small, conical, without 

 canines anteriorly, uniserial in both )aws; vomer toothless. GiU-rakers rather short 

 and broad ; lower pharyngeals each with a row of sharp-pointed teeth on outer edge 

 and one or two irregular teeth inside them. Dorsal fin commencing just above 

 posterior nostril of blind side, and well in front of eye : all the rays simple, scaled on 

 both sides. Tip of fir.st interhaemal spine not projecting in front of anal fin. Some 

 of the rays of the dorsal and anal fins prolonged. Pectoral fins unequal, that of ocular 

 side larger ; all the rays simple. Pelvic fins short-based, subequal and subsymmetrical. 

 Scales very small, cycloid or feebly ctenoid on ocular side, all cycloid on blind side. 

 Lateral line developed only on ocular side of body, with a strong curve above the 

 pectoral fin : no supratemporal branch. Vent on blind side, above first ray of anal 

 fin ; urino-genital papilla occupying a similar position on ocular side. 



Two species from deep water in the Indian Ocean and Pacific. 



Synopsis of the Species. 

 I. Depth 1 1 to a little more than twice in length : scales all cycloid, about 105 

 in lateral line ; some of the dorsal and anal rays prolonged only in the 

 male ........... i . ocellata. 



II. Depth about ij in length ; scales ctenoid on ocular side, cycloid on blind 

 side, about 140 in lateral line ; some of the dorsal and anal rays prolonged 

 in both sexes ......... 2. radula. 



The sexual differences in this genus are discussed on p. 33. 



I. T.ENIOPSETTA OCELLATA (Giinther). 



Pseudorhombus occUaius, GUnther, 1880, .Shore Fishes " Challdi^er ", p. 56, pi. xxiv, tigs, s, b ; 



Regan, 1908, Trans. Linn. Soc. London, Zool., xii, p. 232. 

 t aniopsetta ocellata, Norman, 1927, Rec. Ind. Mus., xxix, p. 17. 



Depth of body i| to a Uttle more than twice in the length, length of head 3I to 

 4. Anterior profile of head steep, a little concave in front of eyes. Snout shorter 

 than eye, diameter of which is about 3 in length of head ; lower eye in advance of 

 upper, which is close to edge of head. A strong spine in front of each eye in the male, 

 but only a blunt spine in front of lower eye in the female ; a spine on the snout above 

 the maxillary' in both sexes, and sometimes one or two spinous processes on the 

 interorbital ridge. Maxillary extending to below anterior part of eye, length 3} 

 to 3 J in that of head ; lower jaw scarcely projecting, i\ to 2| in head. 5 gill-rakers 

 on lower part of anterior arch. Scales all cycloid, about 105 in lateral hue. Dorsal 

 88-93 '■ first ray with a broad membranous flap ; in the male the rays increase more 

 or less regularly in height to the twelfth, the next six or seven rays being prolonged 

 and more or less free from the membrane of the fin, the highest much longer than 

 head ."^nal 74-78 ; the first six or seven rays prolonged in the male, the fir.st ray 



