OO EERTHEA. 



species to the United States under the names of Caloihrix 

 Orsiniana. C. Dillwynii, C. gyjjsojjhila, C. radiosa, C. Mene- 

 ghininna, C. crnsfaceum, and probably also C. laciicola and 

 C. Hosfordii. These references of WoUe's can be accurately 

 determined however, only by one who may have the oppor- 

 tunity of consulting his herbarium specimens. Bornet and 

 Flahault had no fresh water material from North America, 

 but the following fresh water species have been determined 

 for the writer by Dr. Bornet. 



Dichothrix Bauer iana (Grunow) B. & F. occurred to Dr. 

 Herbert M. Bichards upon rocks in a lily pond near New- 

 port, R. I., and to the writer in Bound Pond at Lantern Hill 

 in Ledyard, Conn. The filaments form a verdigris-green, 

 plush-like coating about ^| of an inch thick, upon rocks and 

 small stones. It was again found by the writer growing upon 

 stones about the edges of Lake Whitney, in Hamden, near 

 New Haven, Conn. 



Dichothrix gypsophila (Kuetz) B. & F. formed gelatinous 

 yellowish masses upon rocks and small stones about the edge 

 of Long Pond at Lantern Hill in Ledyard, Conn., in Septem- 

 ber, 1892. The gelatinous character was due chiefly to a 

 small Schizothrix which grew with the Dichothrix. 



Rividaria haematites (DC.)Ag., as yet known with certainty 

 only from Europe, where^ however^ it is widespread, grows 

 upon dripping rocks at Bridal Veil Falls in Williams Canon, 

 near Manitou, Colorado. It forms a reddish crust of consid- 

 erable extent and thickness and is somewhat zonate within. 



Stigonema informe Kuetz, known certainly in this country 

 only from Aiken, South Carolina, was found in small quantity 

 in Long Pond at Lantern Hill, in Ledyard, Conn. 



Scytonema ocellatum Lyngbye forms a dark brown felt 

 upon rocks just above the surface of Massapoag Brook at 

 Sharon, Mass. It is a very widespread species but is not 

 credited to North America by Bornet and Flahault. 



