LARVAL FORMS OF FRESH-WATER MULLET 



419 



I MM 



Figure 4. — Caudal skeleton of a 29.4-mm. Ji^&hos^owim* montirola. (Camera lucida drawing from a cleared 



and stained specimen. ) 



TEETH 



The larval sea-stage of .4. monticola have a band 

 of strong, sharp-pointed, conical-shaped teeth in 

 the upper and lower jaws, of which the outer ones 

 are the larger (fig. 6A and 6B) ; bands of sharp- 

 pointed, conical-shaped teeth on the vomer and 

 palatines (tig. 6C) ; and strong, sharp-pointed 

 conical teeth on the tongue arranged in several 

 patches; one center patch near the tip of the 

 tongue, followed by a single row of about 8 to 10 

 teeth along each side of the tongue, and a small 

 isolated center patch of smaller teeth near the 

 rear of the tongue (tig. fil)). There are no teeth 

 in the lips of .4. ftionticola. 



In M. rureiiKi and M. rephalux there are no 

 teeth on the vomer or palatines, and the setiform 

 or ciliform teeth occur in the upper and lower lips. 



PIGMENTATION 



The sea-stage specimens of A. monticola are 

 all rather heavily pigmented (some more than 

 others) so that they appear black on tbe upper 



half of the body shading to a lighter, yellowish 

 color on the ventral surface. Pigment spots are 

 smaller and closer together on the upper part of 

 the body and larger and less numerous on the 

 lower half of the body. In the size range of sea- 

 stage specimens (24.1 to 31.S mm.) the first and 

 second dorsal fins and the caudal fin have pig- 

 mentation, but the anal, pectorals, and ventrals 

 do not. See figure 2. 



This is in sharp contrast to the coloi-ation of 

 specimens examined from fresh-water streams. 

 These tend to be brownish on tlie dorsal surface, 

 becoming blotched brownish to below the mitlline 

 of the body, and white on the belly and the lower 

 sides of the body and head. There is a dark spot 

 at the caudal base. 



MISCELLANEOUS STRUCTURES 



Gill rakerx. — The following counts were ob- 

 tained on the lower limb of the first arch: 14 in 

 a 25.5 nun. specimen; Hi in specimens 29.4 ami 

 31.5 nun.: 17 in a .'iil-mni. specimen; and 1!> in 



