Fishes from Lagos. 125 



between tlie dorsal fins. Mouth less undulated, straight 

 exce))t for a median prominence in the lower jaw fitting an 

 emargination in the upper. Upper nasal valve less extended, 

 ending at the middle of the length of the nostril. 



A single specimen, an immature male, 700 mm. in total 

 length. 



3. Platyrldna sclioenleini,, Miill. & Henle. 



This species is known from the coasts of India and West 

 Africa, but has not been recorded from South Africa. 



4. Trygon margarifa, Giinth. 



5. EIops lacerta, Guv. &, Val. 

 G, Clujpea dorsalis, Cuv. & Val. 



7. Pellonula vorax, Giinth. 



8. Arius Iieudeloti, Cuv. & Val, 



A specimen of 300 mm. is the first example of this species 

 to reach the British Museum. According to the original 

 description, " Les plaques palatines sont tr^s-^cartees et tr^s- 

 petites^'; in the present example there is a very small patch 

 of teeth on one side of tlie palate, but none on the other. A 

 related species, A. parkii, Giinth., has been placed in the 

 synonymy of A. heudeloti by Boulenger (Cat. Afr. Fish. ii. 

 p. 387), but differs from it notably in having two compara- 

 tively large patches of teeth on the palate, separated by an 

 interspace much less than their own width. In addition the 

 mouth is narrower (prsemaxillary band of teeth four times as 

 long as broad in A. parkii, seven times in A, heudeloti), the 

 skull is less coarsely granular, &c. 



9. Heierenchehjs microphthalmus, Hegau. 



Ann. & Mag-. Nat. Hist. (8) x. 1912, p. 321 ; Pellegriu, Ann. Inst. 

 Ocean. Monaco, vi. fasc. 4, 1914, p. 23, pi. i. fig. 4, 



10. Murcenesox ferox, Costa. 



Two examples, 800 and 1200 mm. in total lengtli, show 

 that this species, originally described from the Mediterranean, 

 is quite distinct from the American i7. savanna, Cuv. The 

 vomer is armed witli a series of 11 to 13 teeth, which ends 

 posteriorly nearly at the level of the anterior edge of the eye ; 



