3. MYXus. 467 



Snout broad, approaching in form that of a true 3Ligil, with the 

 lower lip somewhat sharp. The pra^orbital has a slight notch an- 

 teriorly, and has the margins serrated. The maxillary does not ex- 

 tend to below the orbit. The anterior dorsal has slendei\spines, and 

 commences a little nearer to the base of the caudal than to the snout ; 

 tho posterior dorsal commences behind the, anal. Caudal deeply 

 emarginate ; vertical fins not scaly. A black spot superiorly in the 

 axil of the pectoral fin. 



2. Myxus harengus. 



D. 4 ||. A. ^. L. lat. 38. 



A single series of small fixed -teeth in the upper jaw, none in the 

 lower or on the vomer; lips thin. Pra}orbital serrated anteriorly 

 and inferiorly. Anterior dorsal spines of moderate strength, half as 

 long as tho head. 



I'acific coast of Central America. 



a-h. Twenty-two lines long. Collected by Captain Dow ; presented 

 by Dr. P. L. Sclater, Seer. Zool. Soc. 



Head and body compressed, the greatest depth being about one- 

 fifth of the total. The cleft of the mouth is rather broader than deep, 

 and does not extend to the anterior margin of the orbit. Sides and 

 belly bright silvery, back green. 



The two following species, perhaps, belong to this genus : — 



3. MyxvLB curvidens- 

 Mugil curvidens, Cuv. ^- Vul xi. p. 149. pi. 313. 



D.4||. A.|. 



Teeth in both the jaws rather strong, in a single series, those of 

 the lower having the points directed downwards, like the intermax- 

 illary teeth. Eyes without adipose membrane ; the maxillary is 

 entirely hidden by the prajorbital ; vertical fins not scaly ; no elongate 

 scales in the axils of the fins. Base of the pectoral blackish. (Val.) 



Island of Ascension. Bahia. 



4. Myxus ciliilabis. 

 Mugil ciliilabie, Cuv. ^- Val. xi. p. 151. 



D.4||. A.f 



This species is thus described by Valenciennes : — It has tho teeth 

 smaller and finer than M. curvidens, to which it is closely allied ; 

 they are less recurved downwards, but form a series of cilia which 

 have a different arrangement from that in the other species of Mugil. 

 The back is more straight, the body more x'ounded, the head shorter, 

 and the scales smaller than in M. curvidens. 



Lima. 



2 H L> 



