Dr. A. Giinther on neio Species of Fishes. 397 



Mugil rodericensisj sp. n. 



Allied to M. TroscheUi, Smithii, and compressus, but with a 

 narrower and longer caudal peduncle. 



D. 4 I ^. A. ?. L. lat. 30. L. transv. 11. 



The height of the body is a little more than the length of 

 the head, and one fourth of the total (without caudal) ; the 

 head is two thirds as high as long ; the diameter of the eje is 

 one fourth of the length of the head, and contained once and 

 three fourths in the width of the interorbital space. Eyelids 

 not developed. Upper profile of the head and nape nearly 

 straight. PrjBorbital scaly, emarginate and finely denticulated. 

 Snout a little shorter than the eye ; the maxillary extends 

 beyond the prjeorbital, and its extremity is uncovered ; upper 

 lip thin. There are twenty-one scales between the snout and 

 the dorsal fin. The least depth of the tail is less than one 

 half of the length of the head ; and the caudal peduncle is 

 considerably longer than deep. The spinous dorsal is higher 

 than the soft ; the spines are strong, the length of the first ex- 

 ceeding that of the postorbital portion of the head ; the base of 

 the first spine a little nearer to the root of the caudal than to 

 the end of the snout. The soft dorsal and anal nearly entirely 

 scaleless ; the anterior third of the anal in advance of the 

 origin of the soft dorsal. Caudal fin forked. Pectoral shorter 

 than the head. Coloration uniform. 



One specimen 10 inches long and several young ones were 

 collected by Mr. Gulliver in fresh water in Rodriguez. 



Myxus ccBcutiens. 



D. 4 I ^. A. |. L. lat. 43. L. transv. 14. 



Teeth very small, movable, bent, those of the upper jaw 

 in a single series ; a notch in the middle of the upper jaw to 

 receive the mandibular symphysis. Lower jaw with a similar 

 series of horizontal teeth ; other, smaller teeth behind appear 

 to be destined to replace those in function. Lower surface of 

 the mandible without transverse folds. Two round, hard, ap- 

 parently toothless, naked patches on each side of the palate. 

 The maxillaiy does not quite extend to the front margin of 

 the eye. Snout obtuse, shorter than the eye, which is two 

 sevenths of the length of the head and two thirds of the width 

 of the interorbital space. Eye with a broad anterior and pos- 

 terior adipose eyelid. The depth of the body is nearly equal 

 to the length of the head, which is two sevenths of the total 

 length (without caudal). Pectoral extending to the commence- 



