THE AMERICAN MIDLAND NATURALIST. 



phytic bacteria and lists also the following as not being in- 

 frequent. 



BACTERIACEAE. 



Pseudomonas pyocyanea (Gessard) Migula. 

 Pseudomonas violaceus (Schroeter) Migula. 

 Pseudomonas fluorescens (Fluegge) Migula. 



PHYCOBACTERIACEAE. 



Cladothrix dichotoma Cohn. In water. — Jelliffe. 



BEGGIATOACEAE. 



Beggiatoa alba Trev. Frequent on Long Island. — Jelliffe. 

 Heggiatoa mirabilis Cohn. On stalks and stones in inner har- 

 bor.— D. S. J. ; H. H. Y. 



SCHIZOPHYCEAE f 



CHAMAESIPHONACEAE. 



Chamaesiphon sp. Epiphytic on Cladophora sp.— D. S. J. 



CHROOCOCCACEAE. 

 Calothrix confervicola Ag. On Cladophora, tide pools. Lloyd's 



Point, L. I.— M. L. J. 

 Calothrix Crustacea (Schousb.) Bar. and Thur. On grasses 



and algae at Eatons Point, L. I. — N. M. G. 

 Calothrix parasitica (Chauvin) Thuret. Common on Nema- 



lion.—C. S. H.; D. S. J. 

 Calothrix pulvinata Agardh. — C. S. H. Growing on tufts of 



Spartina patens. — D. S. J. 

 Calothrix scopulorum (Web and Mohr.) Ag. — C. S. H. On 



posts under old mill. — D. S. J. 

 Clathrocystis rosea — persicina Cohn. Salt creeks, Laurelton 



pier.— D. S. J. 

 Chrdococcus turgidus (Kutz) Naeg. On Spartina stubble in- 

 ner harbor.— C. S. H., D. S. J. and H. H. Y. 

 Coelosphaerium Kutzingianum Naeg. Frequent. — Jelliffe. 

 Dactylococopsis rhaphidivides Hans. Common in Jarvis pond. 



— C. S. H. ; N. M. G. 



t This group is revised following the terminology given in "Minnesota 

 Algae." Vol. I. Report of Survey, Botanical Series VIII., 1910, Pro- 

 fessor Josephine Tilden, U. of Minnesota. 



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