556 E. W, SEXTON AND ANNIE MATTHEWS. 



days' interval, so that now the water is fresh. Although the original 

 large adults have disappeared, we still have breeding pairs mixed with 

 their own progeny in this jar. To the individuals in the second bell- 

 jar small quantities of sea-water have similarly been added from time 

 to time, and the water is now full-strength sea-water. The large 

 adults died off in this case also, but their numerous progeny are 

 flourishing and breeding 



The papers referred to above are : — 



1. 1889. Bella A^ALLE, A. " Deposizione, fecondazione, e segmentazione delle 

 uova del Gammarus j}ulex/' Atti. Soc. Nat. Modena. Ser. Ill, Vol. VIII. 



2. 1912. Embody, G. C. "A Preliminary Study of the Distribution, Food, 

 and Reproductive Capacity of some Fresh-water AraphijDods." Internat. Revue, 

 Leipzig, 1912. 



'.I. 1903. Holmes, S. J. " Se.^ Recognition among Amphipods." Biol. Bull., V. 

 4. 1912. Sexton, E. W. "Some Brackish-water Amphipoda, etc." Proc. 

 Zool. Soc, September, 1912. 



