NO. 2133. FISHES TAKEN BY "ALBATROSS/' ISSS— THOMPSON. 



411 



cliiloensis^ in the much more sloncler tail; the wider spacing of the 

 dorsals, which are live instead of two scales apart; tlie presence of a 

 series of small spines on the upper surface of the eyebaU; the slightly 

 larger eye; the very much smaller barbels on the lower jaw; and the 

 position of the vent nearly opposite mid-length of the ventrals 



17. PARALICHTHYS BRASILIENSIS (Ranzaiii). 



Numerous specimens, tlic largest 25 cm. in total length, from 

 Montevideo, and one from Buenos Aires. The latter is labeled 

 "tapa cielo or chelo." This name is given to Si/mpJiurus plagusia by 

 Berg (Enumeracion de los Feces). 



This species is very close to ParalicJttJiys adspersuf^ of the western 

 coast of South America, and as a large series of botli is available, a 

 detailed comparison has been made. The most easily noticed differ- 

 ences are the more advanced position of the lower eye in P. hrasiliensis, 

 the position of the posterior nostril of the blind side below the first 

 dorsal ray rather than in front of it, and the brevity of the flap in 

 the anterior nostrds. In the measurements and counts the following 

 differences may be noticed: The scales in the lateral line average 12 

 more in P. adspersus; the head is very slightly longer, the depth 

 slightly greater, the snout (measured from the lower eye) longer, 

 and the gill rakers somewhat sliorter. By reference to the descrip- 

 tion of P. adspersus (see west coast species, p. 468) the measurements 

 given in hundredths of body lengths may be compared with the 

 following of six specimens of P. hrasiliensis: 



Dorsal rays 68 to 75; anal 53 to 57; pores in lateral line 95 to 100; 



scales in transverse series .vj^ — ^ (counting oblique series at deepest 



part of body); head 0.27 to 0.20; depth 0.41 to 0.40; eye 0.04 to 

 0.05; interorbital space 0.02; snout 0.05 to 0.06 (from lower eye); 

 mandible 0.15 to 0.17; maxillary Icngtli 0.12 to 0.13; pectoral length 

 on eye side 0.11 to 0.13; on blind 0.10 to 0.12; depth of caudal 

 peduncle 0. 11 to 0.125 ; gill rakers 4 or 5 + 15 or 16 ; their length 0.025 ; 

 vertebrae 11 + 23 = 34. 



Table of comparative measurements of Paralichthys arlspersus and P. hrasiliensis. 



Locality. 



r. adspersus. 



Mazat- 

 lan. 



Bay of Callao, 

 Peru. 



Tome and Lota, Chilo. 



Body length nun 



Dorsal rays 



Anal rays 



Scales in lateral line 



Scales transverse 



Heads 



Depth 



Eye 



Snout from lower eye 



Maxillary 



1 Voyage Beagle, p. 30, 1S42. 



210 



72 



l()(i 



0.32 



.48 



.or. 



.07 

 .15 



205 

 71 



no 



0.31 



.10 

 .05 



55 

 110 



0.30 



.44 

 .05 



97 

 09 

 5G 

 104 

 39+50 

 0.30 

 . 52 

 .00 

 .005 

 .13 



119 

 39+50 

 0.30 

 .49 

 . 055 

 .07 

 .13 



90 

 73 



112 



40+47 

 0. 29 

 .47 

 .0() 

 .07 

 .125 



S9 

 70 

 50 

 110 

 + 52 

 1.30 

 .48 

 .05 

 .0115 

 .13 



79 

 73 

 57 

 113 



0.30 

 .48 

 .00 

 .07 

 .13 



2 Measurements in liundroill lis of lengths fo base of caudal. 



