732 Osteology and Classification of 'lie Oohioid Fishes. 



the metapterygoid is identifieJ as mesopteiygoid, the sym- 

 plectic as metapterygoid, and part ( f the proeoperculum as 

 symplectic. 



Fig. 2. 



Pectoral fin-skeleton of : — A. Eleotris mannorata; B, Gobius capita ; 

 and C. Periophthahmis koelreuteri. 



cl, cleithrum ; sc, bypercoracoid ; cor, hypocoracoid ; r, radials. 



Subfamily 1. Gothinm. 



Eyes not erectile ; base of pectoral fin normal. Pectoral 

 radials moderately elongate, inserted on a very narrow ridge 

 o£ the cleithrum ; hypocoracoid small, the foramen between 

 it and cleithrum minute or absent. 



The genera may be arranged thus : — 



I. Spinous dorsal, when present, separate ; soft dorsal free from 



caudal ; pectorals large ; vertebrse 25 to 28 (10-12+15-17). 



Gohitis, Latrunculus, Gohiodon, Hoplopomus, Crypto- 

 centnis, Chasmuts, Tridentiger, Crystallogobius, 

 Luciogobitts, Leucosjyarion, Sici/cUmn, &c., &c. 



II. Vertical fins confluent ; pectorals small or moderate. 



A. Vertebrae 23 or 29 (11 + 17-18); 



caudal vertebraj elongate Gobioides, Tcenioides. 



B. Vertebrge 34 (10+24) ; caudal ver- 



tebrae normal Trypauchen, Tryjuiuchenichtkys. 



In Trypauchenichthys the pelvic fins are small, separate, 

 each of a spine and four soft rays, tiie two inner vestigial ; 

 in the other Gobiinse each pelvic fin has five soft rays and 

 they are united to form a disc. 



