240 Field and Forest Rambles. 



on the centre of the tongue, where sometimes one or two 

 may be met with in the adult. 



The fins vary considerably. By compounding many notes 

 taken at different times from a large number of specimens, 

 and striking an average, I found that the same discrepancies 

 are applicable to the three American lake trouts * 



The adipose fin is club-shaped in the togue and namaycush, 

 and, as before stated, not so long and slender as in the sis- 

 cowet. The specimen represented in page 235 was a very 

 fine togue captured during the spawning season in the Toledi 

 Lakes, Upper St. John. It displays the powerful proportions 

 of the fish at this time of the year, which are very different 

 to what obtain subsequently when fecundation has taken 

 place. The scales of this species, and seemingly of the other 

 two, are small and elliptical, decreasing in size from above 

 downwards. I counted in two instances 132 along the lateral 

 line, which some authorities state takes its origin at the upper 

 angle of the operculum, but this statement, made I believe 

 originally by Dekay, is incorrect in the case of the togue, 

 and it would appear, also, in the other two. The line com- 

 mences at the upper third of the operculum (a), and 

 curves slightly downwards until beyond the pectoral fin, when 

 it runs straight for the tail. The latter, although furcate in 

 the old, is by no means so in younger individuals. There is 

 often an abnormal thickening or enlargement of the lower 

 caudal lobe which I have seen in several instances, and the 

 same has been noticed by other observers. It is met with in 

 both sexes, but whether congenital or induced I cannot say ; 

 it may have originated from the friction in digging the sand 

 for the deposition of the ova. I counted 1 30 pyloric coeca and 

 62 vertebrae! in two females of the togue. 



* Thus in the namaycush, siscowet, and togue the fin rays are as 

 follows: Gill rays, 12-13; D, 12-14; P, 12-14; A, 11-13; V, 9-10; 



C, 19H. 



f " Holmes, in "The Maine Agricultural and Scientific Report, 1862," 



