. The Cambridge natural history. Zoology. CYCLOSTOMATA 427 ment, or attached to stones by the buccal funnel. In the spring the Sea-Lamprey ascends the rivers to spawn, and, after deposit- ing its eggs in furrows which it excavates in the river-bottom, it returns to the sea. The river-Lampreys spawn in the smaller streams and brooks. The North American Brook-Lamprey,. Fio. 243.—Spawning of the Brook-Lamprey (P. loilderi). On the right side of the figure a male is attached to the head of a female. (From Bashford Dean and F. B. Sumner.) Petromyzon (Zampetra) wilderi, which is found in the neighbo
. The Cambridge natural history. Zoology. CYCLOSTOMATA 427 ment, or attached to stones by the buccal funnel. In the spring the Sea-Lamprey ascends the rivers to spawn, and, after deposit- ing its eggs in furrows which it excavates in the river-bottom, it returns to the sea. The river-Lampreys spawn in the smaller streams and brooks. The North American Brook-Lamprey,. Fio. 243.—Spawning of the Brook-Lamprey (P. loilderi). On the right side of the figure a male is attached to the head of a female. (From Bashford Dean and F. B. Sumner.) Petromyzon (Zampetra) wilderi, which is found in the neighbour- hood of New York, deposits its eggs on the gravelly bottom of a brook, in a small gravel-filled hole lying between a number of large rounded stones^ (Fig. 243). In the vicinity of the "nest" some ten to twelve Lampreys congregate, the males, however, being much more numerous (five to one) than the ^ Bashford Dean and F. B. Sumner, Trans. N. X- Acad. Sd. xvi. 1897, p. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harmer, S. F. (Sidney Frederic), Sir, 1862- ed; Shipley, A. E. (Arthur Everett), Sir, 1861-1927. ed. [London, Macmillan and Co. , Limited; New York, The Macmillan Company
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895
