82 



KNDEAVOIK SCIENTIFIC RESULTS. 



Head, from end of snout to first gill-opening, 6.47 in the total 

 length ; its breadth behind the spiracles 1.6 in its length. Depth 

 of body at origin of first dorsal, 1.34 in the head. Snout almost 

 equal to the eye in length, a little less than half the interocular 

 width, and 5.67 in the head. Preoral portion of head 3.14, 

 aperture of mouth 2.79, interocular space 2.66, and least depth 

 of the caudal peduncle 5 in the head. Width of spiracle two- 

 thirds the diameter of the eye. 



Body elongate, rather robust. Head short and broad, flat 

 above, the lower profile forming a deep curve from the snout to 

 the mouth. Snout obtusely pointed anteriorly but widening 

 rapidly to the nostrils which form an angle on each side of it 

 about the middle of its length. Eyes large, a little nearer the 

 spiracle than the tip of the snout, and placed in the upper half of 

 the head. Mouth very slightly curved, the centre of the upper 

 lip below, or a little behind the middle of the eye ; upper lid 

 continued backward in a broad curve on either side to below the 

 spiracle, forming an oblique groove behind each angle of the 

 mouth. Nostrils wide, opening anteriorly on the sides of the 

 snout with large circular apertures, their lower halves each with 

 a broad, free, skinny lobe in front. Spiracle very broad, 2^-2| 

 in the interval separating them. First to fourth gill-slits sub- 

 equal in width ; about as wide as the spiracle ; the fifth is a little 

 wider than the others and extends a little round the anterior base 

 of the pectoral. 



8\fii)MiM'mii»|/j 



Fig. 1 — Under side of head, teeth, and scales of Scymnorhinus licha. 



Teeth of the lower jaw divided into two portions, the upper 

 one triangular and minutely serrated ; lower portion quadrate, 

 the outer surface with two tumid swellings at its upper angles, 



