37. ME80PUION. 199 



margin of tlie orbit. Prseoperculum with a distinct notch, iater- 

 operciilum vnth a slight and flat knob. The fourth and fifth dorsal 

 spines longest, longer than the soft rays. Caiidnlis shghtly emargi- 

 nate ; pectoral fin extending to the origin of the anal fin. Coloration 

 miifonn, without black blotch ; caudalis with a narrow black margin. 

 Caribbean Sea. 



a, h. Adult : skins. Jamaica. From Dr. rarneU's Collection. 



c. Hall-gro^^^l : -skin. Jamaica. From Dr. ParncU's Collection. 



d. Fine specimen. South America. Presented by Sir 11. Schomburgk. 



bb. Ground-colour red. 



18. Mesoprion borensis. 



Diacope boreusis, Ciiv. ^ Val. ii. p. 436 (not Richards.). 

 tiea, Less. Voy. Dup. p. 231. pi. 23 (operclcs bad). 



The height of the body is 2|- in the total length, the length of the 

 head 3^- ; the upper profile of the snout vciy slightly concave. Ifotch 

 of pra^operculum and knob of interoperculum very conspicuous. 

 Caudalis slightly notched ; pectorals reaching to the front end of the 

 anal. Red : the dorsal and caudal fins with a \'iolet shade. (Less.) 



Island of Borabora. 



This species belongs perhaps to the genus Genyoroge ; according to 

 the figure quoted, the third anal spine is much longer than the second. 



19. Mesoprion erythrinus. 

 Diacope erj-thrina, Riipp. N. W. Fische, p. 92. t. 23. f. 3. 



14 9 



The height of the body is one-thii'd of the total length, the length 

 of the head one-fourth ; the outline of the forehead gibbous, promi- 

 nent above that of the snout. Prajoperculum with a very slight 

 notch, interoperculum without knob. Lower jaw longest. Caudalis 

 tnmcatod, pectoi-al not quite reaching to the anal fin. Uniform red. 

 {Rupp.) 



Accordhig to the figure given by Dr. RiippeU, this species would 

 be easily distingiu.shed by the veiy small size of the eye, its diameter 

 being about one-seventh of the length of the head ; but this is not 

 mentioned in the description. 



Red Sea. 



20. Mesoprion rangnis. 



Rangoo, Russell, pi. 94. 



Mesoprion rangus, Cut. i§- Val. ii. p. 482 ; Cantor, Catal. p. 14. 



D._L^. A.-i. 



13-15 8 



The height of the body is 3^ in the total length, and equal to the 



