356 



ADDENDA. 



it differs in a very extraordinary manner from the other fish of this 

 family in which sexual differences are observed. From an inspec- 

 tion of the figure, we should have considered the specimen to be a 

 male ; but Prof. De Filippi says distinctly that the peculiar anal fin 

 is found in the female az weU as in the male. 



1. Lebistes poeciloides. 



De Filippi, I. c. taf, 4. fig. 6. 



D. 9. A. 7. V. 6. L. lat. 34. L. transv. 8. 

 The specimens are 1| inch long. 

 Barbadoes. 



ADDENDA. 



Page l4. Salmo salar. 



a'. Fine male specimen, 3 feet long. Beauly. Presented by Lord 

 Lovat as " Bull-trout ". Caught in the beginning of April ; 

 testicles entirely coUapsed. 



"Whilst this sheet was passing through the press, Lord Lovat's 

 kindness afforded me an opportunity of seeing other specimens of 

 " Bull-trout" at the moment when taken from the water. It is his 

 opinion that at least some of the fish are hybrids between the Salmon 

 and Sea-trout {S. tnitta), an opinion confirmed by external appear- 

 ance and by the varying number of pyloric appendages, which, in 

 one specimen, was found to be as low as fifty-four ; yet the relative 

 size of the scales on the tail is in all these Bull-trout the same as 

 in the Salmon. Capt. H. Fraser believes that other specimeos of 

 "Bull-trout" are true Snlmon which, having gone dovsm to the sea 

 as Kelts, return to fresh water before having attained to the con- 

 dition of well-mended fish. Thus, as regards the river Beauly at 

 least, fishes named " Bull-trout" do not constitute a distinct species, 

 but this name would appear to compiise — 



1. Hybrids between Salmon and Sea-trout. 



2. Specimens of Salmon returning from the sea before being well 

 mended. 



3. Sterile specimens — as, for instance, the specimen {a') men- 

 tioned above. 



