250 



FLATFISHES (HE fEROSOMATA) 



Tip of first intcrhariial spme not projecting in front of anal fin. Pectoral fins unequal, 

 that of ocular side larger ; all the rays simple. Anterior ray of left pelvic well in 

 advance of that of right. Scales very small, cycloid on both sides of body ; no supple- 

 mentary scales. Lateral line equally developed on both sides of hodv. with a low, 

 flat-topped curve above the pectoral fin ; no supratemporal branch \ cut on lilmd 

 side, just in front of anal fin. 



Two species from the Indo-Pacific. 



Key to the Species. 

 I .Maxillary extending beyond posterior edge of eye, length T J to i f in head ; 



width of curve of lateral line 5 to 5 J in straight part . . .1. lugubris. 



II. Maxillary extending to below posterior edge of eye, length 15 in head; 



width of curve of lateral line 6 in straight part ... 2. prorigeya. 



I. CHASrANOPSETTA LUGUBRIS, Alcock. 



Chascunopsclla lugubris, Alcock, 1S94, J. .\si,it. Soc. Beng., Ixui (;), p. IJ9, pi. vi, fig. 4 ; .\Ici)ck, 

 1895, lUust. Zool. " Investigator", Fishes, pi. xv, fig. 3 ; Alcock, 1899, Cat. Indian Deep-Sea 

 Fishes, p. 12^ ; Brauer, 1906, '* Valdivia " Tiefsee-Fische, p. 295 ; Norman, 1927, Rec. Ind. 

 Mus., xxix, p. 35, fig. 9 ; Xorman, 1931, Ann. .Mag. Nat. Hist., (10) viii, p. 601. 

 I rachypterophrys raptator, Franz, 1910, Abh. Bayer. Akad. Wiss., Suppl. iv, p. 60, pi. vii, fig. 54 ; 

 Huhbs, 1915, Proc. U.S. Xat. Mus., xlviii, p.'452. 



. Bonde, 1922, Rep. Fish. Mar. Biol. Surv. S. Air., 11, (19--1), Spec. Rep. 



nard, 1925, Ann. S. Afr. Mus., xxi, p. 390. 



n Bonde, 1922, Inm. n/,. p. 8 ; Von Bonde, 1925, Trans. Rov. Soc. S. 



C hascun'ipsctta gilchristi, V'or 



1, p. 7, pl. ii, fig. 2 ; Bat 



C hascanopsetta maculata, Vo 



Afr., 



xii, p. 28S 



Depth of body i\ to nearly 4 in the length, length of head 4 to 5]. Diameter of 

 upper eye 35 to 4 in length of head, 3 to 3 times interorbital width. Cleft of mouth 

 generally oblique, but sometimes nearly vertical or horizontal : maxillary extending 

 to well beyond eye, length ij to 15 in that of head. Width of curve of lateral line 

 .5 to 5 J in straight part. Dorsal 1 14-122. Anal 77-85. Pectoral of ocular side with 

 14 to 17 rays, length ij to 2i in that of head. Caudal obtusely pointed ; caudal 

 peduncle deeper than long. Greyish or yellowish brown, with or without numerous 

 small dark spots ; fins dusky. 



Type. — Indian Museum. No 13728. 



Distribution — CJff south-east .Africa ; Crulf of Manar ; Hay of liengal ; Japan : 

 in deep water. 



