LIST OF PLATES 



Frontispiece — Some examples of plants — the phytoplaukton 



page 



I Fishery Research Ship Explorer 7 



II Tow-iiet: Flow meter: Cyanea: Physalia fo^^ifg 9 



III Meshes of materials used for making nets 10 



IV Plankton nets at sea 15 

 V The Icelandic high speed sampler: The 'Hardy' Continuous Plankton 



Recorder 20 



VI Plankton 'soup' 26 



VII Phytoplaukton 32 



VIII Skeletons of diatoms 35 



IX Ceriitiiiui: NoctiUtca: Phaeocystis 38 



X Protozoa — tintinnid: Zootluviinioti 46 



XI Small jellyfish 47 



XII Ohelia medusae: Chysaora 53 



XIII The life history of .-Ii(m7/it 55 



XIV Goiiioiieiiiiis 58 

 XV Iiiiiihiiia: Lepas: Lagisca: CaUiteutliis: Liocraiiciiia: Pyrotentliis f^uiiig 59 



XVI I'eleUa: Spiratella: Pleuroinachici 61 



XVII Caliviiis and Ei'adue: Podon: Tigriopiis 67 



XVIII Aiioiiiiilocera: zoc:\: Biithycalivuis: Eryoiieiciis fociiig 74 



XIX Phrotiiiiin: Oikopleiira 77 



XX Doliolmn: Clavelina 81 



XXI Disintegrating salp, with embryo: 'veliger' of Nassariiis 82 



XXII Polygordiiis: Aiitolytns 88 



XXIII 'Mitraria' o( Owenici: 'actinotrocha' o{ Phoroiiis: 'tornaria' otBalatio- 

 glossiis: pilchard egg 89 



XXIV Nauplius and cypris of acorn barnacle: zoea and mcgalopa ot crab 91 

 XXV Larva of lobster: zoea of pea-crab 92 



XXVI Life history of starfish, Asterias 93 



XXVII Life history of sea-urchin. Echinus 94 



XXVIII Planktonic stages of fish 99 



XXIX Planktonic stages of fish loo 



XXX The development of the plaice 102 



XXXI Oceanic fish /'^'"'"A' 10^ 



XXXII Fish eggs: 'leptocephalus' of eel: Sagitta catching a fish 105 



XXXIII Ship fouling: choking of pipes 117 



XXXIV Basking sharks I34 

 XXXV Baleen plate of plankton-feeding whale: upper jaw 137 



XXXVI Sagitta indicators 140 



