TRAClirNOTUS.— PLEUEOXECTIDJE. 3 



third of eye. 9 or 10 gill-rakers on lower part of anterior arch. Dorsal 

 I+VI-VII 19-21. Anal II, I 16-17. Anterior rays of dorsal and 

 anal more or less produced into falciform lobes. Pectoral a little 

 shorter than head. Caudal deeply forked, longest rajs 2| to 3 times 

 in total length. Silvery, back bluish grey or olive ; fins yeliow, with a 

 large black blotch on the produced part of the dorsal fin. 



Total length 200 millim. 



Tropical and Subtropical Atlantic, Indian and Tropical Pacific Oceans. 



1-3. Ad. & hgr. St. Louis, Senegal. M. P. Delhez (C). 



4. Hgr. Gambia. J. S. Budgett, Esq. (P.). 



5. Ad., skin. Zanzibar. Sir L. Playfair (C). 



C. Ad. Mombasa. R. J. Cuningbame, Esq. (P.). 



2. TRACHYNOTUS GOREENSIS. 



Cuv. & Val. Hist. Poiss. viii. p. 419 (1831) ; Giinth. Cat. Fish. ii. p. 483 (18C0) ; 



Bleek. Nat. Verb. Ges. Haarlem, xviii. 1803, p. 77, pi. xvi. fig. 3; Steind. 



Sitzl). Ak. Wien, k. i. 18G9, p. 707 ; Pellegr. Bull. Soc. Pbilom. (9) ix. 1907, 



p. 40. 

 TracMnotus maxillosus, Cuv. & A r al. t. c. p. 420. 

 TracJdnotus myrias, Cuv. & Val. t. c. p. 421 ; Giinth. 1. c. 



Distinguished from the preceding by more numerous soft rays in the 

 dorsal and anal fins. Dorsal 1 + VI- VII 20-21. Anal II, I 18-22. 

 A series of 2 to 5 dark dots sometimes present on the lateral line. 



Total length 200 millim. 



West Coast of Africa, from the Senegal to the Congo. — Type in Paris 

 Museum. 



1. Hgr. Gambia. J. S. Budgett, Esq. (P.). 



■2, 3-5. Ad. & yg. Cape Verde Is. Rev. R. T. Lowe (P.). 



6. Hgr. „ Capt. Boyd Alexander (P.). 



7. Hgr. Niger. Mr. L. Fraser (C). 



8. Ad. W. Africa, 



Fam. 10. PLEURONECTID.E. 



Bilaterally asymmetrical fishes probably derived from forms similar 

 to the Zeidce. Easily recognised among all other fishes by the skull 

 being twisted in front and the eyes situated on one side of the body, 

 which functionally represents the upper surface, the other side being 

 usually colourless. Dorsal and anal fins much elongate, with soft rays 



b2 



