THE SEA LAMPREY 



739 



^oman, J. C. C. 



1910. De copulatie van Petromyson planeri. Tijdschr. nederl. dierlc. 

 Yereen, (2), XII, p. vii. 



A careful account of the spawning of Petromyson planeri, 

 observed in a brook near Konigsberg. 

 tfcClure, Charles F. W. 



1893 Notes on the early stages of segmentation in Petromyson 

 murinus L. (americanus Le S.). Zool. Am., XVI, pp. 367- 



1856. Ueber die Entwiekelung der Neunaugen. Ein vorlaufiger 

 Bericht. Arch. f. Anatomie, Physiol, u. wissen. Medicin, Jahrg. 

 1856, pp. 323-339. 



This is the earliest account of the breeding habits of the lam- 

 prey. The observations were made on the brook lamprey; some- 

 times ten or more were seen together tugging at, and transporting 

 stones. The object for which the stones were carried was, how- 

 ever, not made out. He made the discovery, by rearing Ammo- 



Reig 1903 ^^experimental stu dy of the spawning behavior of Lampetra 

 " wildcri Science N S., XVII, p. 529 (abstract). 

 No constant relation between individual fish and indivdual 



bottom ^b^'^elistetce^ath or in the midst of the run- 

 ning water of small masses of water at rest," e. g., in depres- 

 sions or in vicinity of obstructions. 

 1908. Photography of aquatic animals in their ^^J^T ' 

 Bull. V. S. Bureau Fisheries, XXVII, pp. 43-68, Pis. m v. 

 Photograph of four Lampetra ivilderi on a nest— PI. m, ig. 

 Vejdovsky, F. „ . „ hhlT10 . 



Vra 9 . 1*^, » M , «ti* XWX, ^ ^ 

 Observed spawning process m an aquar 

 males and one female. Figures two specimens 

 copulo, but this figure does not represent them m tneir 

 teristic attitudes. 



' L ° PeS J sDawnin^-season of Petromyson 



331. Eemarks on the eggs and spawn j pp 79 _ 83 . 



fl ZtZrT^^o^^ at end 'of December and 



