REARING OF BIVALVE MOLLUSKS
67
plungers or horizontal-action paddles (Fig, 5), and by controlling
tho bacterial flora in the cult,iirt~s by ih addition of Siilmct, our
associntc, t l . 11 idu, to whom t h s o ~ t u t l i c w w t w ~uggested, liati I)cc.n
YJrr. 24. Twelve-day-old larvae of Mercenaria marconaria. Larvas shown in upper
photomicrograph were fed freezo-dried celh of' Imr.hryais galbarn, while thoae in the
lowor picture wore given the Rame quantitiocc Of livo n t h of tho RBIf10 d g m . 1,crrpst
larviu, two t h ) i i t , 215 p loiig.
i ~ l ~ l o
to grow IILI-VIL(~ 01' A t . ?nwrrnririii :LIII\OH~ ax c?ffectivcly I ~ H when
Llwy arc focl o u r Iwnt, livo l o o t l orgtmixms, Hueh JJH naked flagellates.
In some experimcnts olarn Iarvse fed freeze-dried 1. gnlbn?zu grcw aN
rapidly as larvae in the control cultures given the same quantities
of live cells of the same form (Fig. 24).
6
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