120 GOBIII)^. 



The height of the body is contained six times and two-thirds to 

 eight times in the total length, the length of the head three times 

 and three-quarters or three times and two-thirds. Snout produced, 

 depressed, with the lower jaw prominent ; the maxiUary extends to 

 below the middle of the eye ; teeth cardiform. The vertical diameter 

 of the eye is one-half tlie width of the interorbital space. Body 

 brownish, marbled with darker ; head ^^^th two brown stripes be- 

 tween the eye and the upper jaw ; two inchstinct oblong spots on the 

 base of the pectoral. Fins rose-coloured, with series of brown spots. 

 Fresh waters of the West Indian Islands and of Mexico. 



rt. Adidt : has been in chloride of zinc. Barbadoes. Purchased of 



Mr. Cuming. 

 b-d. Adult : skins. Jamaica. From Dr. Parnell's Collection. 



e. Adult : skin. West Indies. From Mr. Scrivener's Collection. 



f, g, h, i. Adidt and half-grown. West Indies. 



k. Adult : stuifed. AVest Indies. Purchased of Mr. AVarwick. 

 l-p. Fine specimens. Mexico. From M. Salle's Collection. — Rather 



more slender than the specimens from the Islands. 

 q. Large specimen. From the Collection of the Zoological Society. 

 ?•. Seventeen inches long. From the Haslar Collection. 

 s, t. Adult and half-grown : bad state. From Captain Sir E. 



Belcher's CoUeetion. 

 u-w. Half-grown : stuffed. 

 X. Adult : skeleton. From the Haslar Collection. 



Skeleton. — The crown of the head is flat, broader than long ; the 

 occipital crest is low, and does not extend beyond the occipital bone ; 

 another crest on each side of the occipital, and parallel to it, is higher, 

 and extends from the suprascapula to another crest which runs 

 transversely from the posterior angle of one orbit across the frontals 

 to the angle of the other. The oblong space between the two lateral 

 and the transverse crests is twice as long as broad. The transverse 

 frontal crest is continuous from one side of the head to the other, 

 and participates in the formation of a muciferous channel running 

 along the posterior margin of the orbit. The interorbital space is 

 broad. The anterior portion of the ethmoid is not covered by the 

 frontal bones. The prsefrontal is well developed, and forms a 

 laterally projecting portion of the orbit. The maxillarj^ bone is 

 curved, sabre-shaped, and very slightly dilated at its extremity. 

 The intermaxillaiy is stout, with the posterior j^rocesses short. The 

 articidar bone and the posterior part of the dentary of the mandible 

 have a broad and thin lamella interiorly. The vomer is anchor- 

 shaped. The palatine bone, and still more the pterygoid, are nan-ow. 

 Tympanic groove with a very large free space behind the tjTiipanic 

 bone. The infraorbital ring is indicated by a small prfeorbital and 

 a rudimentary postorbital. The pracoperculum has a double ridge 

 posteriorly for a muciferous channel, its lower margin being simple ; 

 interoperculum small, operculum and suboperculum of moderate size. 

 Glossohyal triangular ; urohyal elongate, subtriangular. 



The humeral arch is partially lost in our skeleton. Valenciennes 



