Photograph of Plankton, Collected at 8 P.M., April 30, 1927, at Submerged Light 



In this picture are the following organisms: 

 FISH ' 



Larval Fish -_-_--_ Few 



Fish Eggs -------- Few 



TUNICATES,— SEA-SQUIRTS, SALPA 1 



Doliolum -------- Few j 



Appendicularia ------- Few 



ECraNODERMS,— STAR-FISH, SEA-URCHINS 



Larvae, unidentified ------ Few 



MOLLUSKS,— SNAILS, CLAMS, SLUGS, SEA-HARES 



Gastropod larvae,^ — snails _ - _ _ Abundant ] 



Pelecypod larvae,^ — bivalves _ - - - Common 



Creseis adcula, — Pteropod _ _ _ _ Common 



CRUSTACEANS,— CRABS, LOBSTERS, SHRIMPS 



COPEPODS I 



Labidocera sp. ------ - Few I 



Eucalanus sp. ------ - Few j 



Corycaeus sp.- - - - - - - Common j 



Oithona brevirostris - _ _ _ _ - Few j 



Microsetella sp. ------ - One j 



Small calanids ------- Many 



Copepod nauplii __-__- Many 



CIRRIPEDIA,— BARNACLES 



Balanus nauplii - - - - - - -Few 



AMPmPODS 



Virbilia sp. ------- One 



ISOPODS I 



Bopyrid isopods (parasitic) - - . - Two ; 



scmzoPODS 



Heteromysis sp. --■•-- One 



CUMACEANS 



Cuaiacea sp. _---•-- One 



MACRURANS 



Lucifer-like macruran ------ One 



Macruran larvae __-_-- Few 



ANOMURA,— HERMIT-CRABS 



Porcellana zoea __--__ Few 



MISCELLANEOUS CRUSTACEA ; 



Zoeans __---_-- Few \ 



ANNELIDA,— ANNELID WORMS 



Syllidae, (adult) ------ One 



Polychaete larvae ------ Few 



CH^TOGNATHA,— ARROW- WORMS 



Sagitta _----=.-- One 



CCELENTERATA,— JELLY-FISH, ETC. 



Hydromedusae ------- Two 



Siphonophores -.--- = - One 



