RATE OF GROWTH OF SOME SEA FISHES. 229 



These were all placed in one table-tank measuring 5 feet by 2\ 

 feet in area, and 1 foot 6 inches in deptb. On Marcb 21st, 1882, 

 I measured tbese fish, or as many of tbem as I could catch, and 

 found tbeir lengths to vary from 5*0 to 12"2 cm. There were 37 

 of them : some of course had died. They had been fed with chopped 

 marine worms. 



The separate measurements were — 



7*1 cm. ... 9"1 cm. 



7-5 „ ... 91 „ 



7-8 „ ... 9-2 „ 



/•8 „ ... 9'2 „ 



7-8 „ ... 9-4 „ 



8-7 „ ... 9-8 „ 



8-7 „ ... 9-9 „ 



8-8 „ ... 10-1 „ 



8-8 „ ... 10-2 „ 



8-8 „ ... - 11-4 „ 



8-9 „ ... 11-6 „ 



8-9 „ ... 12-2 „ 



In my paper in the preceding number of this Journal, I recorded 

 the fact, that some specimens of the dabs, 4' 7 and 5*0 cm. long, 

 were taken in April and May, and stated that these must be a year 

 old, because they could not reach that length if hatched in the same 

 year. I also estimated the maximum length of specimens one year 

 old at 13*5 cm. These conclusions were founded entirely on speci- 

 mens taken at sea ; the growth of the above-recorded specimens in 

 captivity fully com firms my previous conclusions. None of the 

 captive specimens showed any signs of sexual maturity, an indica- 

 tion that the dab does not any more than other flat-fishes begin to 

 breed before it is two years old. 



Sole a vulgaris, the Sole. 



I have not yet obtained young soles less than 1 year old at Ply- 

 mouth, either in shallow or in deep water. Last summer I specially 

 sought for them in deep water, but obtained none. There is some 



NEW SERIES. — VOL. II, NO. III. 18 



