326 FLATFISHES (HETEROSOMATA) 



Close to P. (■<riwsus and P. ritten. Depth of body twice in tlie length, length of 

 head abont 4. Upper eye entering dorsal profile of head, which is distinctly concave ; 

 diameter of eye 2| in length of head ; interorbital ridge rather low, with two promi- 

 nences anteriorly, close together and situated above front part of lower eye ; a blunt 

 spine posteriorly, which is rather low and directed straight backwards ; two or three 

 ven.' small tubercles round upper eye. Length of maxillary on ocular side 3J, on blind 

 side 35 in that of head : lower jaw 2j in head. 7 to 9 gill-rakers on lower part of 

 anterior arch. About 89 scales in lateral line. Dorsal (61) 69 (72) ; highest rays 

 1 3 in length of head. Anal (44) 49. Pectoral of ocular side with 9 rays (5 or 6 

 branched), length ij in that of head. Caudal peduncle 2\ times as deep as long. 

 Intestme rather elongate and well coiled. Pale brownish ; a prominent dark spot 

 ocellatcd with white in centre of lateral line ; a pair of similar but very inconspicuous 

 spots below posterior parts of dorsal and anal fins : body with some indefinite white 

 spots of irregular size. 



Type. — United States National Museum. No. 74605. 



Distribution. — Northern end of Gulf of California ; in deep water 



Specimen Examined : 



I (132 mm.). Paratypo. Culf of Californi.i. Slauford Univ. 



(lenus 14. ISOPSKTTA. 



Hnpsdl,,. (Lockinstoii) Jordan and Gilbert, iSS.-. Bull. U.S. Xat. Mus., xvi, p. s 52 [Lepidnpaellii 

 noU-l>:s, 1.01 kingtonj ; Jordan and Evcrmann. iH.|8, Bnll. U.S. Nat. Mus., xlvii (3), p. 264; 



Body elliptical, strongly compressed. Eyes on the right side, rather small, 

 separated by a rather narrow, flat, scaled space, the upper close to edge of head. 

 Olfactory lamina? rather few in number, parallel, without rachis. Mouth of moderate 

 size, the length of the maxillary on blind side less than | that of head ; jaws and 

 dentition stronger on blind side of head ; teeth small, conical, fairly close-set, scarcely 

 enlarged anteriorly, chiefly uniserial in both jaws ; vomer toothless. Gill-rakers 

 rather short, few in number ; lower pharyngeals narrow, slender, scarcely approxi- 

 mated anteriorly, their inner edges evenly curved, each with two irregular rows of 

 obtusely conical teeth. Dorsal fin commencing just behind posterior nostril of blind 

 side and above anterior ed.ge of eye ; all the rays simple, scaled on both sides. Tip 

 of first interha?mal spine projecting in front of anal fin. Pectoral fin of ocular side 

 larger than that of Wind side ; middle rays branched. Pelvic fins short-based, 

 subequal and subsymmetrical. Caudal fin with the middle rays longest : caudal 

 peduncle short. Scales small, adherent, closely imbricated, strongly ctenoid on ocular 

 side, ctenoid or cycloid on blind side ; no supplementary scales. Lateral line with a 

 low curve above the pectoral fin ; a supratemporal branch present, with long posterior 

 prolongation. Vent median, between the pelvic fins ; intestine with about 2 simple 

 coils ; 3 -f I rather long pyloric appendages. Vertebra- 42 (10 4- 32). 

 .\ single species from the Pacific coast ol North ,\merica. 



I. ISOPSETTA ISOLEPIS (Lockington) 



I.epuifyp^cttct umbrosu (noti Girard), Lockington, 

 Lepid.ipsetta isolcpn, Lockington, 1881, Proc. U.S. Nat. M 

 Parnphrxs tsokpis. Jordan and Gilbert, :88i, lom.cil 



Xat. .Mus.. .\vi, p. ,S32 ; Jordan, 1884, Xat. Hii 



11. p. 180. 



