22 



TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



was thoroughly skimmed by the Assistant Curator on 

 forty-five of the fifty-eight days over which the season 

 lasted. The largest number of eggs obtained on one day 

 was 356,000 on April 15th, but collections of over 

 300,000 were made on three previous days. The total 

 number for the season was 7,462,000, and the total 

 number of fry set free in the sea was 4,929,600. The 

 majority of the young fish were liberated by Professor 

 Herdman from his yacht ' Runa,' at a distance of about 

 five miles from land. 



" Figures 4 to 9 show a series of stages in the develop- 

 ment of the young plaice from the newly hatched 

 larva (4) through the post-larval metamorphosis (5 to 8) 

 to the young flat-fish (9). They are from photographs 

 taken at Port Erin by Dr. Francis Ward. 



" The numbers of plaice eggs collected and of larvae 

 set free during the past season were as follows : — 



ggs collected. " 



Date. 



Larvae set free . 



Date. 



121,800 ... March 2 



90,300 ... 



March 21 



135,400 ... 



3 



166,400 ... 



„ 21 



59,800 ... 



4 



47,200 ... 



„ 21 



108,000 ... 



6 



85,000 ... 



„ 21 



187,000 ... 



7 



135,500 ... 



„ 30 



116,500 ... 



8 



91,300 ... 



„ 30 



169,000 ... 



. 10 



135,500 ... 



„ 30 



125,000 ... 



, 11 



101,000 ... 



„ 30 



191,000 ... 



, 13 



164,700 ... 



April 4 



192,250 ... 



, 14 



164,000 ... 



„ 4 



99,700 ... 



, 15 



79,700 ... 



„ 7 



174,300 ... 



, 16 



139,700 ... 



„ 7 



159,600 ... 



, 18 



117,000 ... 



„ 11 



199,500 ... 



, 20 



168,000 ... 



„ 11 



176,400 ... 



, 21 



139,700 ... 



„ 12 



203,800 ... 



, 22 



162,700 ... 



„ 12 



175,300 ... 



, 23 



140,700 ... 



„ 13 



198,500 ... 



, 24 



147,000 ... 



„ 13 



135,500 ... 



, 25 



90,000 ... 



„ 15 



202,600 ... 



, 27 



156,400 ... 



„ 15 



188,000 ... 



, 29 



137,200 ... 



„ 17 



312,900 ... 



, 30 



241,300 ... 



„ 18 



