SEA-FISHERIES LABORATORY. 395 



end of the year. The thousands are reached twice in 

 December. 



" Mitraria " larvae are abundant in the early part 

 of the year and in autumn, and are absent throughout 

 the greater part of the summer. Notable numbers picked 

 out are 10,000 on January 4th, 5,000 on January 22nd, 

 4,000 on February 27th, 6,000 on March 8th, 3,000 on 

 April 1st, and 2,000 on April 29th. Then comes the 

 "off" season, till 2,900 on September 17th, 750 on 

 October 7th, 420 on November 14th, and 520 on 

 December 27th. 



Crab Zoeas and Megalopas are not very abundant, but 

 are probably of high nutritive value in the plankton. 

 They do not in our hauls usually get above units and 

 tens, rarely reaching one or two hundreds (200 on 

 March 25th, 100 on May 2nd). 



The Balanus nauplii began this year with 100 on 

 February 1st and 1,200 on February 10th, nearly 10,000 

 on February 29th and 1,600,000 (the maximum) on 

 March 11th. After which the numbers rapidly fell off 

 during April, and reached units at the end of May. Of 

 the " Cypris " stage comparatively few were present, 

 appearing in small numbers early in April, increasing to 

 550 on May 17th, and then dying down to units again 

 early in June. 



Molluscan larvae were fairly abundant. Gastropod 

 larvae appear late in January (1,000 on the 22nd, 900 on 

 the 29th), and the next two months have each some hauls 

 rising to over 1,000 (the highest is 1,600 on March 8th). 

 In April and May the numbers are much less, and June 

 shows none. They re-appear in force in July (4,000 on 

 the 4th), and are fairly abundant during all the 

 remaining months of the year, reaching thousands 

 occasionally in most of them. The highest record is over 



