504 ECTOCARPACEAE. 



Family CHARACEAE. 



Chara foliolosa Muhl., a common stonewort of the West Indian region, 

 has been reported from the Pembroke Marsh (Farlow) by H. & J. Groves (in 

 Urban, Symb. Antill. 7: 43. 1911), under the name Chara seylanica Willd. 

 forma curassavica Braun. What is doubtless the same thing, with same 

 locality and collector, is listed by Collins and Hervey as Chara gymnopus var. 

 Serteroi A. Braun. 



Sub-class PHAEOPHYCEAE. 



Family ECTOCARPACEAE. 



Ectocarpus Mitchellae Ilarv., a species originally described from Nan- 

 tucket, but since found to be widely distributed, has been reported from Ber- 

 muda (Phyc. Bor.-Am. 19%!*), but the specimen distributed does not seem to 

 the writer to belong to this species. The plurilocular sporangia in E. 

 Mitchellae are sessile, ellipsoid-oblong, and very obtuse. In the genus Ecto- 

 carpus the thallus consists of delicate copiously branched filaments made up 

 of a single row of cells. 



Ectocarpus siliculosus arctus (Kiitz.) Kuck., collected at Harris Bay 

 by Hervey (Phyc. Bor.-Am. 1922) has more pointed, ovoid, not always sessile, 

 plurilocular sporangia. 



Ectocarpus confervoid.es (Roth) Le Jolis, with spindle-shaped, sessile or 

 short-stalked plurilocular sporangia, has been found in Bermuda by Hervey. 

 Other species of Ectocarpus certainly occur in Bermuda, but their determina- 

 tion awaits more critical study. 



Ascocyclus orbicularis (J. Ag.) Magnus, has been reported by Collins 

 from Cooper's Island (Phyc. Bor.-Am. 1878), where it forms minute olive- 

 green spots on the leaves of the Turtle Grass (Thalassia) . 



All of the four Ectocarpaceae mentioned above are species of wide dis- 

 tribution and are best known from more northerly waters. 



Family SPHACELARIACEAE. 



Sphacclaria tribuloid.es Menegh. forms brownish tufts of fine sparingly 

 branched filaments about A-l inch high in tide pools and in rock pockets and 

 crevices between the tide lines, especially on the South Shore. The younger 

 terminal branches consist of a single row of cells, but the older parts of the 

 filaments are made up of bundles of parallel cells. The apical cells in this 

 genus are commonly somewhat enlarged, are especially rich in protoplasm, and, 

 often somewhat blackened, are usually conspicuous under a hand-lens in the 

 preserved specimen. In the present species, the filaments commonly bear 

 small multieellular stalked gemmae which in form suggest the fruits of certain 

 species of.Tribiilus and Trapa. 



Family ENCOELIACEAE. 



Colpomenia sinuosa (Both) Derb. & Sol., a widely distributed plant of 

 warm temperate and tropical waters, forms brownish hollow often irregularly 



