226 



Seite sich noch eine Falte erhebt , die am Ende in eine hyaline, den 

 Höcker überragende Haut ausläuft, deren Spitzensaum aber noch 

 nicht die Länge des kürzeren der beiden äußeren Arme erreicht. 

 Durch ein gelbes Bälkchen ist der Spermalapparat an das eigentliche 

 Hinterblatt angekittet. 



(Schluß folgt.) 



2. The Reproduction of the Lobster. 



By Francia H. Herrick, Adelbert College, Cleveland, Ohio, U.S.A. 



eingeg. 20. März 1895. 



An article on «Lobster Reproduction« by Mr. S. Garman has re- 

 cently appeared in the Zoolog. Anzeiger (No. 467, Feby. 4th, 1895), 

 in which he enumerates some interesting observations originally 

 published in a report to the State Fishery Commission of Massachu- 

 setts, in 1S92. The impression is conveyed, quite unintentionally no 

 doubt , that until the publication of the original paper , little was de- 

 finitely known regarding the breeding habits of the lobster. "While 

 pointing out that this is not the case , I do not wish to detract from 

 the interest and value of his work. 



In May, 1891, I published two short papers on the lobster i, which 

 I sent to Mr. Garman at his request. In September, 1891, Bumpus 

 published a careful work on the embryology of the lobster^ , in which 

 many important facts bearing upon the problems of reproduction Avere 

 accurately stated. The report by Garman , addressed Dec. 17th 1891 

 to the Massachusetts State Fishery Commission , and published in the 

 Annual Report of the Fishery Commissioner for 1892, is summarized by 

 the author as follows: »1) The female lobster lays eggs but once in 

 two years, the laying being two years apart; 2) the normal time of 

 laying is when the water has reached its summer temperature, vary- 

 ing in different seasons and places, the period extending from about 

 the middle of June till about the 1st of September, and 3) the eggs 

 do not hatch before the summer following that in which they were 

 laid, the time varying with the temperature, and the period extending 

 from about the middle of May until about the first of August.« 



In regard to the first point, the frequency of spawning, I had 

 made the following observations in my paper just referred to: »The 



1 Notes on the Habits and Larval Stages of the American Lobster , and The 

 Reproductive Organs and Early Stages of Development of the American Lobster. 

 Johns Hopkins University Circulars, Vol. X. No. 87. Baltimore, May, 1891. An ab- 

 stract of these papers was also published in the Zoologischer Anzeiger, Nos. 361 

 and 362, April— May, 1891. 



2 Journal of Morphology, Vol. V. No. 2. Sept. 1891. 



