34. CYNOGLOSSUS. 493 



rather narrow ; lips not fringed. Teeth minute, on the right side 

 only. Gill- opening very narrow. 



East Indian Seas, round the Cape of Good Hope, to the west coast 

 of Africa. Entering fresh waters. 



I. Two nostrils on the left side, one of which is situated between the 



eyes (Arelia, Kaup). 



A. Three lateral lines on the left side, p. 493. 



B. Two lateral lines on the left side, p. 496. 



II. Two nostrils in front of the lower eye, the lower nostril being Avider 



than the upper : Cantoria, Kaup, p. 502. 



in. Only one nostril in front of the lower eye : Tridla, Kaup, p. 503. 

 IV. No conspicuous nostril : Icania, Kaup, p. 504. 



I. Two nostrils on the left side, one of which is situated between the 



eyes. 



A. Three lateral lines on the left side. 

 1. Cynoglossus kopsii. 



Plagusia kopsii, Bleek. Nat. Tydschr. Nederl. Ind. ii. p. 494, and vii. 

 » p. 99, or Verhand. Batav. Genootsch. xxiv. Pleuron. p. 31. 

 Arelia kopsii, Bleek. JEnum. p. 184. 



D. 101-102. A. 76-79. C. 8. V. 4. L. lat. 55. 



Three lateral lines on the left side, and one on the right. Two 

 nostrils : one between the eyes, and the other above the cleft of the 

 mouth. Eyes sub contiguous. Lips not fringed. The angle of the 

 mouth is nearer to the extremity of the snout than to the gill-open- 

 ing ; the rostral hook extends backwards nearly to the vertical from 

 the front margin of the eye. The height of the body is a little less 

 than one-fourth of the total length, the length of the head one-fifth. 

 Greyish ; body and fins with numerous oblong brown spots. {Bl.) 



East Indian Archipelago. 



a. Very bad state. From Dr. P. v. Bleeker's Collection. 



2. Cynoglossus waandersii. 



Plagusia waandersii, Bleek. Sumatra, iv. p. 98. 

 Arelia waandersii, Bleek. Enum. p. 185. 



D. 90. A. 68. C. 10. V. 4. L. lat. 80. 



Three lateral lines on the left side, one on the right. Two nostrils : 

 one between the eyes, the other above the cleft of the mouth. The 

 width of the interorbital space is less than the diameter of the eye. 

 Lips not fringed. The angle of the mouth is much nearer to the ex- 

 tremity of the snout than to the gill-opening ; the rostral hook does 

 not extend to below the eye. The height of the body is contained 

 thrice and three-fourths in the total length, the length of the head 

 five times. Golden-olive-coloured,with irregular brownish spots. {Bl.) 



Sumatra. 



