8. noLocKNTniTji. 49 



inches, lines. 



Length of the head 2 2 



Intoi'space between the eyes U (5 



Length of the snout 8 



of the praeoperciilar spine 4^ 



of the third dorsal spine 1 0^ 



of the eleventh dorsal spine 3 



of the third dorsal ray 1 1^ 



of the third anal spine 1 4^ 



of the foiu-th anal spine 11 



of the first anal ray 1 



25. Holocentrum spinosuni. 



Corniger spinosus, Ar/ass. in Spi.v, Pise. Bras. p. 121, taf. 75. 

 lloloceutruni comigerum, Cuv. l^ Val viii. p. 481. 



D. 12 I 15. A. ± 



The height of the body is 2^ in the total length. Infraorbital 

 arch with four very strong spines, curved and directed backwards, 

 longer than those of the priEoperculum ; the anterior is shortest, 

 one-thii'd only of the length of the second, the second half the size 

 of the third and fourth ; the posterior suborbital bones strongly 

 denticulated. Operculum and limbs and scales of pra^ojjerculum 

 covered with acute spines ; prseoperculum with two strong spines 

 at the angle, the upper of which is the longer ; operculum with two 

 spines of equal size, but shorter than those of the former. 



Coast of Brazil. 



26. Holocentrum retrospinis. 



Holocentrum retrospinis, Guichvn. Poiss. in Ramon de la Sagra, Hist, 

 de rile de Cuba, p. 35. pi. 1. f. 3. 



D. 12 I 14. A. ^. 



The height of the body is 2i in the total length, the length of the 

 head 2J. The infraorbital arch is armed beneath with three long 

 spines, cm-ved and dii'ected fonvards ; the spines of the prseorbital 

 and of the posterior part of the infraorbital arch -with smaller 

 spinous teeth. Both hinbs of the prajoperculum denticulated, witli 

 a rather strong flat spine ; operculum and suboperculum armed mth 

 spinous teeth, the former with two long spines, the lower of which 

 is the stronger. Spines of the fins rather slender ; the soft portions 

 of the dorsal and anal fins rounded, and as high as the spinous. 

 Caudalis forked ; scales deeply serrated. Uniform red. 



Cuba. 



This fish has a remarkable similarity to the preceding species, from 

 the development of the armatm-e of the head ; but the spines of tlie 

 infraorbital have an opposite direction. Gxiichenot describes the sub- 

 operculum as entire, and not denticulated ; but it is evident from 



