BY W. MACLEAY, F.L.S. 



The hyoid bones are the least normal; the urohyal(fig 2 m)is slight; 

 the basihyal (fig 2 b) short ; and the glossohyal (fig 2 k) very small 

 and slightly longer than broad ; the most advanced of these bones, 

 the glessohyal, reaches only to the transverse division at the base 

 of the mandibles, whereas in Mugil Waigiensis the basihyal and 

 glossohyal bones are large and prominent, supporting the whole 

 floor of the mouth, and extending almost to the symphysis of the 

 lower jaw. In Mugil Waigiensis also the mandibular bones are of 

 a slighter make. I propose for this fish which differs considerably 

 in other points than those I have now mentioned from any of the 

 genera of Mugilidce hitherto described, the generie name of 



Aeschrichthys. 



Mouth lateral, extending to the line of the orbit ; hyoid bones 

 not extending on the floor of the mouth, an external transverse 

 fossa at the base of the mandibles, lips thick, lower lip rounded in 

 front, teeth on the upper jaw only. 



Aeschrichthys Goldiei. 



D. 1/8. A. 3/9. L. lat. 46. L. trans v. 14. 



Height of body about four times in the length, body slightly 

 compressed and convex, head very convex ; eye small, without 

 adipose membrane, situated about three of its diameters from the 

 extremity of the snout. Upper lip very thick, extending to the 

 vertical from the posterior third of the eye ; the lower lip is 

 narrowly rounded in front, and is edged on each side below by a 

 rigid and grooved margin, which extends as far back as the upper 

 lip, both being there quite separated from the interoperculum, two 

 fleshy caruncles free at the extremity intervene between the 

 mandibular extremities. The teeth in the upper jaw are 

 apparently serrations of the surface of the bone ; there are two 

 large osseous lumps on the vomer covered with teeth. The tail is 

 forked, the fins are for the most part blackish, so is the upper part 

 of the head and body, the belly seems to have been yellowish. 



Good sized specimens are 18 inches in length. 



