466 MUGILID.E. 



palatine and pterygoid bones. The heiglit of the body is contained 

 five times and a half in the total length, the length of the head four 

 times and two-thirds. Intcrorbital space flat, its width being two- 

 sevenths of the length of tlie head. Snout produced, rather longer 

 than the eye ; lips thin. Pra^orbital with the -margins serrated ; the 

 maxillary extends to the vertical from the anterior margin of the 

 orbit. The anterior dorsal spines rather slender, their length being 

 one-half of that of the head ; they occupy the middle of the distance 

 between snout and base of the caudal. Caudal rather deeply emar- 

 ginate. 



Coasts and fresh waters of Van Diemen's Land and New Zealand. 



a-hy c, d. Adult, half-grown, and young : bad state. From the Ilaslar 

 Collection. — Probably the typical specimens of Dajaus (dojioisis. 

 e. Adult : bad state. Port Arthur. Presented by Sir J. llichardson. 

 /. Adidt : skin. lTo])son's ]5ay. Port Pliillip. 

 (J. Many young and half-grown specimens. New Zealand. 



The original figure of Forster agrees so well with the specimens 

 from the localities mentioned, that tlicre is no occasion to distinguish 

 a Dajmis diemensis from Forster's species. 



3. MYXUS. 



(PMugil, sp., C>ir. ^ Vul. xi. p. ]49.) 

 Cleft of the mouth extending on to tlie sides of the snout, but not 

 to the orbit. Small teeth in a single series in the upper jaw, and 

 somntimea in the lower and on the palate. Upper lip not particu- 

 larly thick ; anterior margin of the mandible sharp. 



1. Myxus elongatus. 

 D. 4 1 1. A. |. L. lat. 45. L. transv. 13. 



A single scries of fine teeth in the upper jaw, none in the lower ; 

 vomer with a narrow cross-band of teeth ; sometimes a very small 

 patch anteriorly on the palatine bones. Lips thin. Pra^orbital 

 serrated anteriorly and inferiorly. The anterior dorsal spine slender, 

 its length being rather more than one-half of that of the head. 



• Coasts of Australia. 

 a. Skin : eleven inches long. lIol)son'8 Pay. Presented by tlie 



Earl of Derby. 

 I. Skin : eleven inches long, i'ort Jackson. Purchased of ^Mr. 

 Gould. 



Although I have only two slcins of this specica, its characters are 

 so marked that it Avill l)o readily recognized even from the incom- 

 plete description wliich I am enabled to give. The body appears to 

 be more elongate than in the otlier s])ecies, its dei)tli being about 

 one-sixth of the total length. The head is long, about one-fifth of 

 the total length, and flat above, the width of the interoi-bital sjjace 

 being contained twice and two-thirds in the length of the head. 



