34 



shows the corresponding endopodite of an immature female 

 of about the same size (If inch) as the mature males. 

 Figures 7 and 8 show the ovary and testis of the two 

 mature Shrimps from which the appendages were taken. 



It will be seen on comparing figs. 5 and 6 that the only 

 differences in this endopodite between male and female 

 Shrimps of the same length are (1) the size, the female 

 branch being decidedly longer, and (2) in the arrangement 

 of the setae along the inner side. The female endopodite 

 has only a small number (3 — 6) of short stout curved setae 

 or bristles, while in the male the setas are more numerous, 

 forming a continuous row, and are longer and more deli- 

 cate and hair like. 



In this neighbourhood most of the large female Shrimps 

 spawned in November. They appear to cast their cuticles 

 just before spawning. Many of the Shrimps caught in 

 the end of October have recently cast their "skins," and 

 the exuviae are frequently taken in the Shrimp nets about 

 that time. 



A few Shrimps can be found at almost any time with 

 "spawn" (embryos) on the abdomen, but there seem to 

 be two chief periods in the year here, just as Ehrenbaum 

 found on the German coast. The times here seem to be 

 late Autumn (beginning of November) and early Summer 

 (April and May.) About 5000 eggs are deposited on the 

 abdomen at a time by a fully mature Shrimp. 



It is very evident even from the few observations we 

 have yet made that there are very many enemies to the 

 Shrimp in all stages of its existence in this neighbourhood. 

 We find it frequently in the stomach of A g onus cataph- 

 ractus and Li/paris montagui and many other fish. Skates 

 eat it in enormous quantity, the large stomach of the fish 

 being sometimes distended with a quart or so of Shrimps. 

 The enormous variations in the catch of Shrimps from 



