498 CLADOPHOBACEAE. 



tion is a subject of widely varying treatment by phycological writers. Clado- 

 phora, in fact, seems to be a genus in which clearly defined species do not 

 exist. Other species, as currently recognized, certainly occur in Bermuda. 



Chaetomorpha Linum (O. F. Mull.) Kiitz. occurs in quiet water, as in 

 Harrington Sound, the ponds of Walsingham, Hamilton Harbor, and at 

 Hungry Bay. It forms unattached tangled mats of delicate uubranched 

 threads (diam. TU-B of a line) made up of a single row of cells. (Phyc. 

 Bor.-Am. 1863, as C. aerea, forma Linum.) 



Chaetomorpha crassa (Ag.) Kiitz. is a species with coarser filaments 

 (J-f of a line in diameter) that is found in tide pools, fish ponds, mangrove 

 swamps, etc. (Phyc. Bor.-Am. 1864.) 



Chaetomorpha brachygona Harv., collected at Walsingham by Collins, 

 has filaments of i-A the diameter of those of C. Linum and C. crassa, with 

 cells scarcely longer than broad. 



Chaetomorpha minima Collins & Hervey, is a name under which the 

 editors of the Phycotheca Boreali- Americana (2007) have distributed a slender 

 plant found by Hervey, attached to Cladopliora, Codium, etc. in Harrington 

 Sound. Endemic. 



Rhizoclonium hieroglyphicum (Ag.) Kiitz., a widely distributed species, 

 has been reported (Phyc. Bor.-Am. 2009) as occurring in Bermuda in 

 reservoirs and in fresh-water rock-pools. 



Rhizoclonium crassipellitum W. & G. S. West, originally described from 

 Portuguese West Africa, has been reported from a fresh-water pool near Ely 's 

 Harbor (Phyc. Bor.-Am. 2008). 



Rhizoclonium Hookeri Kiitz., or something close to it, occurs associated 

 with a moss, Eucladium verticillatum, on the walls of Smuggler 's Cave, near 

 Castle Harbor. The filaments are apparently more robust than those of plants 

 from Kerguelen 's Island to which the name was first applied. 



Rhizoclonium tortuosum Kiitz., which is perhaps an untenable name, may 

 be used for the present for a plant that is found in tangled mats on rocks at 

 the high-tide line on the Paget shore of Hamilton Harbor. 



Rhizoclonium Kerneri Stockmayer, is a name that has been applied by 

 Collins to a plant that forms a dark green film on branches and roots of the 

 mangroves, accompanying Caloglossa Leprieurii. Its filaments are somewhat 

 coarser than those of the type of this species. 



Family DASYCLADACEAE. 



Dasycladus vermicularis (Scop.) Krasser, a dirty-yellowish-green cylin- 

 dric or club-shaped plant, mostly 1-3 inches high and &- inch broad, with 

 densely compacted whorls of branches, which are in turn two or three times 

 verticillately ramulose, has been found on pebbles in a shallow bay on Cooper 's 

 Island by Collins. In this genus the gametangia are terminal on the primary 

 branches. (Phyc. Bor.-Am. 1868, as Dasycladus clavaeformis.) 



