Fishes from Lagos. 127 



15. Scioina nigripinnis, Gliutli. 



16. Otolilhus macrognathus, Bleek. 



17. OtoUthus hracliygnathus, Bleek. 



18. OtoUthus senegalensis, Bleek. 



19. Urano Scopus alhesca, sp. n. 



Depth of body about 4 in the length, length of head (witli 

 lower jaw) about 3. Diameter of eye 5f in length of head, 

 equal to length of snout or to interorbital width. Head as 

 broad as deep; upper surface ilatt'sh, without prominent 

 ridges or tubercles ; interorbital depression twice as long as 

 broad; one subopercular and four pi ceopercular spines. Oral 

 membrane of lower jaw produced into a flap with entire 

 edges, about as broad as long, rounded distally. Prse- 

 inaxillary teeth triserial anteriorly, uniserial laterally; man- 

 dibiilary teeth biserial anteriorly, the inner series stronger; 

 laterally only 2 or 3 canines. Post-temporal spine weak; 

 humeial spine strong, half as long as pectoral fin. 55 scales 

 ill a longitudinal series. Dorsal III, lo-ll ; spinous dorsal 

 low ; soft dorsal emarginale, third or fourth ray longest, 

 I length of head. Anal 13. Pectoral 18-rayed, x lengtli of 

 head, extending to origin of anal. Caudal subtruncate. 

 Greyish-violet ; spinous dorsal black ; oral flap white, 

 conspicuous. 



Two specimens, 175 and 195 mm. in total length. 



The white membranous flap that can be protruded from 

 the mouth of this species is the homologue of the vermiform 

 or filamentous process found in related forms. 



20. Uranoscopus scaler, Linn. 



A Mediterranean species, previously unrecorded south of 

 the Canaries. 



21. Trichiurus leplurus, Linn. 

 Atlantic. 



22. Mugil cephalus, Linn. 

 Mediterranean to S. Africa ; also both coasts of America. 



23. Mugil faldpinnisj Cuv. & Val. 



