46 



Forms from St. John's Bayou : 



Amoeba proteus Leidy. 



Dactylosphaerium radiosum Ehr. 



Biomyxia vagans Leidy. 



Nuclearia simplex Cienk. 



Rhynchonionas nasuta Stokes sp. 



Euglena acus Ehr. 



Euglena viridis Ehr. 



Euglena pisciformis Klebs. 



Phacus triquetra Ehr. 



P'eranema tricophorum Ehr. 



Scytomonas pusilla Stein. 



Tracheloccrca phoenicoptenis Cohn 



Mesodinhim acarus Stein. 



Loxophyllum setigerum Quenn. 



Urocentrum turbo Ehr. 



Parmoecium caudatum Ehr. 



Cyclidium glaucoma O. F. M. 



Lembus velifer Cohn. 



Pleuronema chrysalis Ehr. 



Metopus sigmoides C. & L.. 



Strombidium caudatum From. 



Vorticella alba From. 



Urostyla grandis Ehr. 



Gonostoninm pcdicuHformc Cohn sp. 



Holosticha flava Cohn. 



Oxytricha pellionella O. F. M. 



Oxytricha parallela Eng. 



Stylonychia pustulata Ehr. 



Euplotes harpa Stein. 



Euplofes char on Ehr. 



Aspidisca lynceus Ehr. 



Ur onychia iransfuga O. F. M. 



This Hst represents 32 species and 28 genera, and inchides of 

 the Rhizopoda 4, Mastigophora 7 and Infusoria 21 species. 



A summary of the Beach and Bayou forms shows a total of 60 

 species, 28 of which were found on the beach only, while 14 were 

 confined to the bayou. I have not the least doubt but that a care- 

 ful and prolonged search will treble this number. 



There was no quantitative analysis made of the forms found 

 in the surface plankton of the Gulf, but a rough estimate places 

 the two rhizopods as occasional, the flagellates very abundant 

 and Tintinnopsis beroidea abundant, while the two last recorded 

 ciliates were very scarce and probably foreign to the normal 

 plankton. 



