J04 DISCOVERY REPORTS 



Table 19. Virtual absence of broadly distinguishable age groups among the larvae of 



the East Wind drift 



Calyptopes Furcilias 



Depth Second Meta- , ' , < * ^ 



Month (w.) Nauplii nauplii i 2 3 i 2 3 4 5 6 



April 250-0 — — 47 ^4 



— — 241 69 9 — I — — — 



500-250 — — — — — 



--48 -------- 



750-500 — — — — — — _ 



— 379 74 — — — — — — — _ 



1000-750 — — — — — 



— 322 41 — — — — — — — — 



1500-1000 — — — — — 



March 250-0 — — n 2 



__ 575 16 — — ^ Z Z Z Z 



500-250 — — 23 — — 



— — 149 — — — — — — — — 



750-500 — — — — 



— 509 29 — — — — — — — — 



1000-750 — — — — 



18 442 I — — — — 



1 500-1000 — — — — 



510 95 — — — — — — — — — 



Feb. 250-0 — — 1 — ^ 



-- 138 -------- 



500-250 — — — 1 



--38 -------- 



750-500 — — — — — 



16879 — — — — — — — — 



iooa-750 — — — — 



-138--------- 



1500-1000 — — — — 



Jan. 250-0 — — — ^ 



— I — — — — — 



500-250 — — — — 



750-500 — — ~~~~~~~zz 



2 '^"""""ZZ — — — 



1000-750 — — — " 



5 '"""^""■ZZZZZZ 



1 500-1000 — — — — 



among the larval communities of the East Wind zone. For there, as Table 19 shows, in February, 

 March and April, when in the Weddell zone the dual age is most apparent, the only clearly 

 distinguishable stock is that of the younger rising from below. There can be little doubt 

 that our repeated recording of the young risers in the East Wind drift to the virtual exclusion 

 of an older population, while pointing on the one hand to a much curtailed spawning season, 

 a short-term phenomenon suggestive of the 'spontaneous' outburst (p. 44) of Ruud, is associated 

 too with the brief and sporadic opening up of the ice-fields which in these high latitudes 

 is known to occur irregularly and at unpredictable times and places all round the Antarctic 

 continent (see p. 177). 



