732 Osteology and Classification of the Oobioid Fishes. 



the metapterygoid is identifieJ as mesopteiygoid, the sym- 

 plectic as metapterygoid, and part of the piOBoperculutn as 

 syraplectic. 



Fig. 2. 



Pectoral fin-skeleton of : — A. Eleotris marmorata ; B. Gobius captto ; 

 and C. Periophthabnus koelreuteri. 



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



Subfamily 1. Gobiin^. 



Eyes not erectile ; base of pectoral fin normal. Pectoral 

 radials moderately elongate, inserted on a very narrow ridge 

 of tlie cleitlirum ; 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 ; vertebrae 25 to 28 (10-12+15-17). 



Gobim, Latruiiculus, Gobiochm, Hoplopomus, Cri/pto- 

 centrus, CViasmids, Tridentitjer, Crystallofiobius, 

 Luciogobiiis, Leucosparioii, Sici/dit(7}i, &.C., &,c. 



II. Vertical fins confluent ; pectorals small or moderate. 



A. Vertebrae 2S or 29 (11 + 17-18); 



caudal vertebroj elongate Gobioides, Ttenioides. 



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



tebra) normal Trypauchen, Tnjpauchenichthiis. 



In Trypaiichenichthijs the pelvic fins are small, separate, 

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

 in the other Gobiinte each pelvic tin has five soft rays and 

 they are united to form a disc. 



