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THE AMERICAN NATURALIST [Vol. XL VII 



spawning run. They are precociously developed in advance of 

 the normal spawning period of the species. So far as known, the 

 grilse of the king salmon, coho and dog salmon are exclusively 

 males, of the sockeye, almost exclusively males, except on the 

 Columbia River, where both sexes are about equally represented. 

 The larger grilse meet or overlap in size the smaller of those in- 

 dividuals which mature one year later at the normal period. 



6. Grilse of the sockeye are in their third year, of the king sal- 

 mon in their second or third year, of the coho and the dog salmon 

 in their second year. 



7. The great differences in size observed in spawning runs are 

 closely correlated with age, the younger fish averaging constantly 

 smaller than those one year older, though the curves of the two 

 may overlap. 



This article is also printed in the Pacific Fisherman. 



F. L. Landacre in the Jour. Comp. Neur. discusses certain 

 ganglia of the gar pike and their relations and significance. 



In the Bur. Fish. Doc, A. B. Alexander discusses the halibut 

 fishing grounds of the Pacific Coast. 



In the Eapp. Cons. Internat. de la Mer, Professor D. W. 

 Thompson, of Dundee, describes the distribution of the cod and 

 haddock. 



In the Bull. Soc. Geol. de France, Mr. Priem discusses the 

 fossil fishes of the Upper Tertiary in southern France and also 

 the Mezozoic fishes of the same region. 



In the Bull Amer. Mus., Dr. Ilussakof describes a sawfish 

 embryo. 



In the Bull. Bur. Fish., Professor J. O. Snyder describes under 

 the name of Salmo regalis, the royal silver trout of Lake Tahoe. 

 It is one of the most remarkable of the many American species 

 of trout, being of beautiful steel blue and silver with very few 

 spots. It is probably older and more primitive than any of the 

 other trout, doubtless being part of the original fauna of Lake 

 Lahontan. 



David Starr Jordan. 



