92 GOBIIDJE. 



a. Front teeth of the lower jaw not larger than the others. 

 1. Sicydium plumieri. 



Gobius plumieri, Bl. v. p. 125. pi. 178. tig. 3 ; JBl. Schn. p. 69 ; Lacep. 



ii. pp. 537, 562. pi. 15. fig. 2. 

 Sicydium plumieri, Cuv. ^- Val. xii. p. 168. 



B. 4. D. 6| ^. A. ^, L. lat. 85. Vert. 11/15. 



Scales sometimes rather irregularly arranged. Some of the dorsal 

 spines produced into long ribands. Uniform brown, or yellowish- 

 olive marbled with brown. ' 



Rivers of the West Indies. 



a. Adult. Barbadoes. Purchased of Mr. Cuming. 



h-d. Adult : stuffed. West Indies. From Dr. Parnell's Collection. 



e-h, i-l, m-n. Adult and half-grown. From the Collection of the 



Zoological Society. 

 0. Adult : skeleton. From the Collection of the Zoological Society, 



Skeleton. — The general form of the skull has been noticed by 

 Valenciennes, but the skeleton from which he has taken his notes 

 appears to have been defective ; he says, " le maxillaire n'est aussi 

 qu'un leger filet." On the contrary, we find that that bone is very 

 stout and long, curved like a prolonged \, recei\nng the sabre-shaped 

 prgeorbital in its posterior concavity, and the intermaxillary in its 

 anterior. Both maxillary bones are rather remote from each other 

 in consequence of the great breadth of the snout, and each has a 

 flat process superiorly, bent towards that of the other side. The 

 posterior process of the intermaxillary is short and exceedingly 

 broad, so that the outlines of the entire bone form an elongate rect- 

 angular triangle. The mandibles are feeble, and the dentary has 

 nearly a transverse direction. The pubics form together a bony 

 capsule which is completely closed, and only open anteriorly ; each 

 pubic bone is separately articulated to the humerus of its side, as in 

 Gobius. 



There are eleven abdominal and fifteen caudal vertebrae, the latter 

 division being only a little longer than the former. Eibs moderately 

 developed, with long epipleiu'als. The neural si^ines of the abdominal 

 vertebroB are short, stout, and depressed. 



|3. The two front teeth in the lower jaw enlarged. 

 2. Sicydium lagocephalum. 



Gobius lagocephalus, Koelreider, Nov. Comm. Pdrop. ix. p. 428. p). 9. 



figs. 3, 4 ; Pall. Sjncil. Zool. viii. p. 14. pi. 2. figs. 5-7. 

 Sicydiimi lagoceplialum, Cuv. i^- Val. xii. p. 174. 



D.6|±. A.± 



The scales on the neck and belly are as large as the others. The 

 breadth and height of the head are equal. The anterior dorsal is as 

 high as the body. Greyish-brown (in spirits), sometimes clouded 



