274 



TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



in the beginning of May and the end of August) there 

 are successive humps in June, early August and 

 September leading to the maximum in October. This is 

 followed by a rapid fall in November, and the minimum 

 extends through December, January and February, the 

 numbers commencing to rise again in March. On 

 comparing the two curves it will be noticed that the April 

 maximum for Copepoda is distinctly later than that for 

 Diatoms, and that again the October maximum for 

 Copepoda follows after the September increase of Diatoms. 

 To a less extent throughout the rest of the year the two 

 curves are complementary with the exception of late 

 August and early September, when both are low. 



■5^030 





t! :::::|::: 



LOik,> ^tfcL _. 1 /*. i'avl. LViv /Jai, Jj 



L--1 _L -r-IT-T- ^ 1 /-Ki -1 H 



+ 



± _ ...... eL ... f ... i± .. _ _j____ - 







J |~r __ 



/ 1 ' 



KCO) 







± • r * + [ t r t 







,5 1 1— | ,- 



EE!EEEEEEE±SEEEEEEEEE=EE_iEEEEEEEEEEE_!EEp | ====== SEEEEEpEEEEpEEEE 



eiieeJeeiee 



1 1 \\\\\\\M\\ 1 ^ffl 





W P \ . ; \ ^ 



sE^EEEEE 



• -:. -it- - 2 Ei:^:_:^^:r::- |;^,J:V t ;.. : • 



* 



EEE:EfeE^EE|EH^E^|:|EEEi:^=:E 



■v- \~\ — 



j n 1— j — 



:::pf:a^::^:r:: :::: :5::::::^-:I: E"-rf::^gl: 





:;2:::::<ztt:i!:::":::±:::::::::ls^jtJ:::±::::s::^E^:: 



wsMsU *^ St- J 



-•o^^^^? ^4a*^5^^M^^*^«»^*^^^^^^^^^^« N ^^3^* % ^^^ ,c * ; s*^ 



fin Ftt 



M~J AJnl Way June. J^ly aUj S -f t 6EF~ "Nov Dec 



Fig. 11. 



Ctrrtpede Larvae in Bay. 



The Nauplius and Cypris stages of Balanus form an 

 interesting study. The adult Balani are present in 

 enormous abundance on the rooks of Bradda Head, and 

 they reproduce in winter, at the beginning of the year. 

 The Nauplii first appeared in 1907 in the bay gatherings 

 on February 22nd, and increased with ups and downs to 

 their maximum on April 15th, and then decreased until 



