163 
Plagusia marmorata, var. africana. 
(Plate XLVII.) 
De tOae Ge che ayy. yb l. LO. 
Depth of body 3.6, length of head, 44 in total length (without 
caudal). Eye small, diameter equals interorbital width, upper 
in advance of lower, slightly in advance of middle of head. 
Angle of mouth below hind edge of lower eye and nearer edge 
of operculum than snout. <A tubular nostril in front of lower 
eye and a corresponding one on the blind side. The snout is 
rounded and blunt, not pointed. - 
The single ventral is joined by a membrane to the anal. 
Scales, ctenoid on both sides. 
Two lateral lines on left side separated by 17 rows of scales. 
No lateral line on right side, though there are 3 or 4 pierced 
scales in front and behind nostril on the right side of the head. 
This fish closely resembles Plagusta marmorata, Blk. but 
differs in having a few more scales in the lateral line, a much 
blunter snout, but chiefly in the absence of a lateral line on the 
right side. 
Locality : A single specimen from Natal. 
KEY TO SOUTH AFRICAN PLEURONECTIDAE. 
A. Jaws and dentition nearly equally developed on both sides. 
a. Eyes on left side, teeth small, scales 
deciduous a is .. Arnoglossus 
t. Dize, Aves ome, ean (a) . macrolepis. 
POH ey was yz, Mere ere (2)) x capensis. 
b. Eyes on left side close together, 
teeth unequal in size .. a Pseudorhombus 
1. Lower jaw with 5 teeth (3) . russelli. 
2 LS Tho kee (4) , andersoni. 
ah anes Say © 20 (5) 5 natalensis. 
e. Eyes on left side widely separated Platophrys 
1. D. 76-83, A. 58-62, LI. 4o (6) grandis- 
quama. 
2 D875 Aue eae eso AE A) $5 dimorphus. 
d. Eyes on right side Be .. (8) Paralichthodes algoensis. 
