208 CLASSIFICATION OF FISHES, ETC. 



Other large spines ; eyes excessively large ; mouth 

 completely vertical ; teeth none. 



T. Australis Sk. Nat. Miss. pi. 378. 



Monocentrus Cuv. Body entirely mailed with large 

 angular plates^, which are rough and carinated ; dorsal 

 fins twOj the first of a few very thick spines ; one 

 large spine shows the ventrals, in the angle of which 

 are the true fins, composed of soft and almost im- 

 perceptible rays. 



M. Japonica. Sch. pi. 24. Cuv. pi. 97. 



Oriosoma, Cuv. Body short, thick, oval, armed with 

 conical horny tubercles of different sizes, two of 

 which represent the first dorsal ; all the other fins 

 with soft rays ; body granulated j belly protuberant ; 

 mouth small, vertical. 



O. coniferum. Cuv. pL 99. 



5. SuBFAM. HELOTIN^. 



Dorsal fin one, deeply cleft ; branchial membrane of 

 six rays ; jaw-teeth numerous, small, close set, and 

 of equal size ; head and muzzle naked ; dorsal, and 

 often the anal fins sheathed at their base with scales ; 

 swimming bladder two-lobed, or contracted in the 

 middle ; pectorals pointed ; strong spines in the middle 

 of the operculum. Analogous to the Sparinae. 

 Therapox Cuv. Spine on the opercule very strong ; 

 preopercule with pectinated teeth ; outer range of 

 the teeth strongest ; ventral behind the pectoral ; 

 caudal forked ; lower jaw slightly longest (?). Con- 

 necting this sub-family with the Holocentrinae. 

 T. Theraps. Cuv, Val. 53. 



Datnia Cuv. Body broad; head and muzzle con- 

 tracted and rather pointed ; dorsal and anal fins 

 sheathed before, and scaled behind ; lower jaw 

 shortest ; dorsal and anal spines remarkably krge ; 

 head scaly ; preopercule toothed ; opercule with two 

 small prickles. Representing Centropomus and Gerres. 

 D. argentea. Cuv. pi. 54. 



