THE GREAT LAKE THOUT. 157 



Mr. Dugan (fish vender) has frequently had specimens of S.ferox for 

 sale 30 lbs. weight, but never knew one to exceed 31 lbs.* 



The following is the description of Dr. Scouler's specimens : 



Male, length 32| inches ; D. 14 (including very small anterior one) ; 

 P. 14; V. 9; A. 11 ; C. 19. 



Female, length 30-l 'inches ; D. 13 (including very small anterior one) ; 

 P. 14 ; V. 9; A. 12;' C. 19. 



Teeth are considerably stronger in the male than female ; these on vo- 

 mer extend on both 1| inches. 



Operculum differs much in form in the two sexes — in the female ap- 

 proaching in roundness to that of the salmon. 



From eye to snout the difference in length is great between the sexes, 

 being much longer in the male. 



Spots on operculum and sides of the head in both sexes round (more 

 numerous in female) ; Avhich form they also are generally on tail of fe- 

 male when they appear on its base and upper portion only — no spots on 

 tail of male. On D. fin of male spots roundish, on D. fin of female longish, 

 oval ; on sides of male fish, the spots are rudely roundish ; on sides of 

 female they are altogether different, being all rudely formed thus, X"' 

 sometimes two or three X's being joined. Longest D. rim/ is the 6th in 

 both specimens, and not " the 3rd," as stated by Mr. Yarrell ; it is cer- 

 tainly the 3rd of the conspicuous rays, but in reckoning the very short 

 anterior ones which make the total nvmiber 14, it is the 6th, or first 

 branched or doubly bifid ray. In the scales of the Dolochan f and male 

 S. ferox there is a difference, those of the former appearing (on the fish) 

 more elongated and more regularly rounded at the free edge, those of S, 

 ferox being very irregular in outline at the free edge : those towards the 

 tail chiefly alluded to. 



Oct. 19, 1836. — I examined six specimens of S. ferox, from 10 to 12 lbs. 

 weight, and found the markings of the sexes as above described ; four of 

 them were males, and had the dull orange rings round spots below lateral 

 line. 



Oct. 11, 1838. 



1. S. ferox, milt maturely developed, stomach empty. 



2. Many-spotted one ; 13 inches long; milt maturely developed, stomach 

 empty. Coeca 35, and tolerably uniform. 



3. One 14^ inches long, milt mature ; stomach contained one Mysis-like 

 crustacean. 



4. 14| inches long ; milt mature ; stomach contained some Mysis-like 

 Crustacea, and a few scales like those of pollan. 



5. 17 inches long, filled with ova about full size ; stomach empty, 33 

 coeca, some long and some very short. 



Lough Neagh Trout, Oct. 19th, 1S3S. 



Sahno ferox 18 inches, male, stomach matters indistinguishable, coeca 34. 

 Salmo Trutta 14 inches, female, filled with ova of pea size, stomach 

 matters indistinguishable. 



Salmo ferox 13 inches, male, stomach empty, coeca 36. 



Ditto ' 12i — — - — — _ 39. 



Ditto 12^ — — — - — — 49. 



Ditto 12" — — — — about 45. 



* In Sampson' s Londonderry the great trout of L. Neagh is said to reach 

 50 lbs. 



t Specimen from Tollymore Park. 



