2 
BULLETIN OF THE BUREAU OF FISHERIES 
Section 1. — General survey of the animal 
plankton (zooplankton) — Continued. 
The more important groups of plank- 
tonic animals — Continued. 
Crustaceans — Continued. 
Copepods — Continued. 
Euchseta norvegica 
Euchseta spinosa 
Eucheirella rostrata 
Eurytemora herdmani 
Gaidius tenuispinis 
Halithalestris croni 
Harpacticus littoralis 
Harpacticus uniremis 
Heterorhabdus spinifrons 
Idya furcata 
Labidocera sestiva 
Lucicutia grandis__ 
Metis ignea 
Mecynocera clausi 
Metridia longa 
Metridia lucens 
Monstrilla serricornis 
Oithona similis I 
Paracalanus parvus 
Parathalestris jacksoni 
Phyllopus bidentatus 
Pleuromamma 
Pseudocalanus elongatus 
Rhincalanus cornutus 
Rhincalanus nasutus 
Scolecithricella minor 
Temora longicornis 
Temora turbinata 
Tortanus discaudatus 
Undeuchseta major-* 
Undeuchaeta minor 
Zaus abbreviatus 
Zaus spinatus 
Table of copepods in vertical 
hauls, May to October, 1915, 
by Dr. C. B. Wilson 
Table of copepods in vertical 
hauls, February to May, 1920, 
by Dr. C. B. Wilson 
Table of copepods in surface 
hauls, February to May, 1920, 
by Dr. C. B. Wilson 
Table of copepods in horizontal 
hauls, December, 1920, and 
January and March, 1921, by 
Dr. C. B. Wilson 
Supplementary note on the cope- 
pods, by Dr. C. B. Wilson 
Daphnids (Cladocera) 
Section 1. — General survey of the animal Pag® 
plankton (zooplankton) — Continued. 
The more important groups of plank- 
tonic animals — Continued. 
Worms 308 
Glass worms (chsetognaths) 308 
Sagil ta elegans 308 
Sagilta serratodentata 320 
Sagil ta maxima 324 
Sagilta lyra 327 
Sagitta hexaptera 328 
Eukrohnia hamata 328 
Other chretognaths 334 
Tomopterids 334 
Tomopteris catharina 334 
Tomopteris septentrionalis 340 
Pelagic ccelenterates 340 
Hydroid meduste 341 
Melicertum campanula 341 
Staurophora mertensii 342 
Ptychogena lactea 348 
Mitrocoma cruciata 348 
Phialidium languidum 350 
Trachomedusae 352 
Aglantha digitale 352 
Scyphomedusae 357 
Cyanea capillata var. arctica 357 
Aurelia aurita 362 
Other scyphomedusae 364 
Ctenophores 365 
Pleurobrachia pileus__ 365 
Mertensia ovum 371 
Bolinopsis infundibulum 372 
Beroe cucumis 372 
Other ctenophores 376 
Siphonophores 376 
Stephanomia cara 377 
Diphyes arctica 379 
Other siphonophores • — 379 
Pelagic hydroids 379 
Section 2. — General survey of the plank- 
tonic plants (phytoplankton) and 
unicellular animals 381 
Phytoplanktonic communities 383 
Quantitative distribution of the phyto- 
plankton 397 
Peridinians 407 
Ceratium 407 
Other peridinians 416 
Diatoms 417 
List of diatoms at representative 
localities 423 
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