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The Reproduction of the Lobster. 



By 



E. J. Allen, B.Sc. 

 Director of the Plymouth Labonitory. 



The Habits and Dcvclo})mcnt of the Lobster, and their hearing iqwn its Artijicial Propaga- 

 tion. By Francis H. Herrick, Professor of Biology in Adalbert College. Bulletin of the 

 United States Fish Coinmission, vol. xiii. 1893. 



Tfie III' production of the Lobster. By Fraucis H. Herrick. ZoologiscJier Anzeiyer, xvii. 

 August, 1894, and xviii. June, 1895. 



Lobster Reproduction. By S. Garnian, Mus. Comp. Zool. Cambridge, Mass. U.S.A. 

 Zoologischer Anzeigcr, xviii. Feb. 1895. 



Der Hclgolamler Hummer cin Gegcnstand deutsclier Fischerei, von Dr. Ernst Ehrenbaum. 

 Wissenschaftliclie Mceresuntersuchungen herausgegcben von der Komm. z. iciss. Untcrsuch 

 d. deiUsclien Meere in Kiel u.d. Biol. Aust. auf Helgoland, Neue Folge, heft i. 1894. 



Amongst the numerous subjects which have occupied the attention of 

 the fishery authorities of the United States, that of the great decline in 

 the productiveness of the lobster fishing industry has received much 

 consideration, and several competent naturalists have, in consequence, 

 devoted themselves to a scientific study of the habits and life-history of 

 the American species. This species (Homariis Americanus) is so nearly 

 allied to the European lobster (Homarus vulgaris), that the results 

 arrived at for it, with regard to such questions as the time of year at 

 which spawning takes place, the length of time during which the eggs 

 are carried by the female attached to the under side of the abdomen, 

 and the time of year at which the eggs are hatched, might be expected 

 to apply, to some extent at least, to the latter. That this is so, appears 

 to be abundantly proved by Dr. Ehrenbaum's study of the lobsters 

 which frequent the shores of Heligoland, and certain observations which 

 I have been able to make on lobsters taken in the neighbourhood of 

 Plymouth during the last two years, in the course of my work on the 

 nervous system of the embryo, also tend to confirm this view. 



In America, the investigation of the subject seems to have been 

 carried on independently, at about the same time, by Herrick and 



