

^ 



.<'%. 



J\^ % n / 



'4:.y 



PI gi. 



DEL. F S.R 



Larval Stages in Plankton (pp. 122, 2U\ 



1. Larva of Porcelain Crab ( PorcellanaK xl2, 



2. Larva of Hermit Crab ( Eupagtirus). x 12. 



3. Larva of Squat-Lobster ('<^«/«^''''^^J, xl2. 



4. Shell of larvel Mollusc f Echivospira), xi2. 



5. ^\\\&(iw°,K( Lf.Kcka-'tiara nctona), X&. 



6. Larva of Sea Urchin (Echinus esculentus), X20. 



R 253, 



