102 CALIFORNIA FISH AND GAME. 



of practical improvements Avere put into effect ; the Sisson and the 

 Tahoe stations were enlarged and improved ; the hunting license law was 

 passed, which placed at the command of the commission an increased 

 amount of funds that could be devoted to the propagation and protec- 

 tion of the fish and game ; the fish-distributing ear was built ; the game 

 farm was established, and other improvements were made. In the 

 carrying out of all of this work ]Mr. Vogelsang took an active part. He 

 resigned in I'OIO, but was reappointed executive officer in 1920 and held 

 that position until March, 1922. 



There have been many other faithful hatchery employees, but their 

 vears of service have been more limited. 



THE RETURN OF MARKED KING SALMON GRILSE. 



By J. O. Snyder, Stanford University. 



Twentj^-three marked king salmon grilse were taken at the Klamathon 

 racks last fall. This is the first result of a marking experiment initi- 

 ated in 1918 by W. H. Shebley, in charge of fishculture. A complete 

 account of the marking of these fish, as published in California Fish 

 AND Game, July, 1920, may be summarized here. From king salmon 

 eggs taken in ]\Iill Creek, a tributary of the Sacramento River, in 

 November, 1918, and hatched at Fall Greek Hatchery on Klamath River 

 in February, 1919, 250,000 fish were placed in a rearing pond. In 

 November, 1919, these were liberated in Klamath River, after 25,000 of 

 them were marked by removing the adipose and right ventral fins 

 (Fig. 40). It appears that the marking Avas successfully accomplished 

 and that the fish were liberated under the best conditions. Some of 

 these were expected to return as grilse in 1921, and later as older fish. 



The marked fish appeared at Klamathon, where they were stopped by 

 the racks, from October 24 to November 14, when the last one was 

 taken. Of the last ones secured, Captain Lambson remarks, "Two 

 Avere in very fine condition, as if lately from salt AA'ater. " These fish 

 measured from 154 to 24^ inches to the end of the middle caudal rays. 

 All Avere mature males. 



Scales of these marked fish, together with mutilated fins, Avere care- 

 fully preserved by E. V. Cassell, foreman of the Fall Creek Hatcheiy. 

 This material and a considerable amount of necessary data Avere assem- 

 bled and forAvarded to the AA'riter by Captain G. H. Lambson. There- 

 fore the record of each specimen is accurate and complete. 



A photomicrograph of a scale of one of these grilse is here presented 

 as figure 43. An examination of this scale Avill reA'eal some peculiarities 

 of structure. It Avill be seen that a Avell-defined imier part or nucleus, 

 A, IS composed of 11 or 12 concentric rings or circuli, AA'hich are closely 

 apposed and in some places broken or branched. Outside the nucleus 

 and surrounding it is a broad area of more-regularly formed circuli, 

 AA^hich are at the same time much Avider. This area, Avhich may be 

 designated A-D in the figure, is bounded at D by a croAvded condition 

 of the circuli. Beyond this area is a third region, D-E, the circuli of 



