24. MUR.T'XA. 125 



or twice and one-third in the length of the head. The lengtli of 

 the head is one-half of that of the trunk. Uniform hlachiali-hron'n : 

 dorsal with a black, anal ivith a narrow ivhite edije. 

 Tropical parts of the Atlantic. 



ff, b. Fine specimens. Cape Verde Islands. Presented by the Rev. 

 R. T. Lowe. 



c. Adult : stuffed. Fernando Po. 

 (/. Adult. Mexico. 



55. Muraena unicolor. 



Miirpenophis unicolor, De la liuclie, Ann. 3Lix. xiii. 180i^ p. ."^'iV, 



Mursena cristini, Risso. Ichth. Nice, p. 368, or Eur. Mend. iii. p. 101. 



monaca, Cocco. 



unicolor, Lowe, Trans. Zool. Soc. ii. p. 192 ; Costa, Fann. Nap. 



Peso. 

 PThyrsoidea microdon, Kavp, Apod. p. 89, fig. 64. 

 Thyrsoidea unicolor, Kanp, Apod. p. 91. 



Teeth in front of the jaws, on the maxillary and, generally, on the 

 vomer biserial; the lateral teeth of the mandible uniserial. Ca- 

 nines small, scarcely larger than the others. Anterior nas.al tubes 

 extremely short. Gill-ojjenings a little larger than the eye, which 

 is very small. Snout short, obtuse, thrice as long as the eye, which 

 is somewhat nearer to the angle of the mouth than to the end of the 

 snout. Cleft of the mouth of moderate width. Tail a little longer 

 than the body ; the length of the head is contained twice and one- 

 half or twice and two-thii'ds in that of the trunk. Nearly uniform 

 brown or broAvnish black ; the head is darker than an obscure lighter 

 cross band behind the angle of the mouth, which is black. Some- 

 times the body or the anterior portion of it with an indistinct net- 

 work of short black lines crossing each other. Fins with a light 

 edge. 



Yert. 65/71. 



Mediterranean ; Madeira ; St. Helena ; (Madagascar ?). 



a. Half-grown. Algiers. Presented by Lieut.-Col. Playfair. 



b, c. Half-grown. Madeira. Presented by J. Y. Johnson, Esq. 



d, e-f. Adiilt and half-grown. Si Helena. Presented by J. C. 



Melliss, Esq. 



q. Adult. From the Collection of Dr. van Lidth de Jeude. 



h,. Adult : skeleton. Madeira. From the Collection of the Zoolo- 

 gical Society. 



56. Muraena madereusis. 



Pseudomursena madeu'ensis, Johnson, Proc. Zool. Soc. 1860, p. 167. 



Most closely allied to 31. unicolor, from which it apparentlj' 



differs in the dentition. Known from two very old examples only *. 



Teeth uniserial, not numerous, slightly serrated behind; anterior 



* I have also to remark that a smaller example, 21 inches long, given by 

 Mr. Johnson to the Liverpool Museum as Pseudomurmna madeirensis, is nothing 

 but Murmna unicolor. 



