FISHERIES, GAME AND FORESTS. 213 



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Atgrafion or "Running." 



After thus feeding to an unusual extent, their reproductive elements (gonads) 

 become mature and their alimentary canals commence to atrophy. This duct finally 

 becomes so occluded that from formerly being large enough to admit a lead pencil of 

 average size when forced through it, later not even liquids can pass through, and it 

 becomes merely a thread closely surrounded by the crowding reproductive organs. 

 When these changes commence to ensue, the lampreys turn their heads against the 

 current and set out on their long journeys to the sites that are favorable to spawning, 

 which here may be from two to eight miles from the lake. In this migration they are 

 true to their instincts and habits of laziness in being carried about, as they make use 

 of any available object, such as a fish, boat, etc., that is going in their direction, 

 fastening to it with their suctorial mouths and being borne along at their ease. During 

 this season it is not infrequent that as the Cornell crews come in from practice and lift 

 their shells out of the water, they find lampreys clinging to the bottoms of the boats. 

 Mr. H. Carr, former State Game Protector, at Union Springs, N. Y., recently told us 

 that as many as fifty lampreys had been seen at one time clinging to the side of his 

 yacht as he sailed toward the head of the lake in the spring time, but they would 

 drop off when he turned to come down the lake. They are likely to crowd up all 

 streams flowing into the lake, inspecting the bed of the stream as they go. 

 They do not stop until they reach favorable spawning sites (described later), 

 and if they find unsurmountable obstacles in their way, such as vertical falls or 

 dams, they turn around and go down stream until they find another, up which 

 they go. This is proven every spring by the numbers of adult lampreys that are 

 temporarily seen in Fall Creek and Cascadilla Creek. In each of these streams, 

 about a mile from its mouth, there is a vertical fall over thirty feet in height 

 which the lampreys cannot surmount, and in fact they have never been seen 

 attempting to do so. After clinging with their mouths to the stones near the foot of 

 the falls for a few days, they work their way down stream, carefully inspecting all the 

 bottom for suitable spawning sites. They do not spawn in these streams because there 

 are too many rocks and no sand (see "Requisite Conditions for Spawning"), but 

 finally enter the only stream (the inlet) in which they find suitable and accessible 

 spawning sites. 



The three-toothed lampreys of the West Coast climb low falls or rapids by a 

 series of leaps, holding with their mouths to rest, then jumping and striking again and 

 holding, thus leap by leap gaining the entire distance, (see illustration No. 15, the 

 reproduction of Dr. Smith's photograph of three-toothed lampreys climbing falls, and 

 his interesting article in the Scientific American for April, 1900.) The lampreys here 



