1925] SetcheU-Garrfncr: Melanophyceae 529 



whether microscopic or eliminated by some method of syncopation 

 may not even be surmised. 



Two genera have been reported from the western coast of North 

 America, but there is so much doubt about one of them (Striaria, 

 as indicated below) that we have taken only one under serious 

 consideration. 



21. Striaria Grev. 



Greville, Algae Brit. Syn., 1830, p. XLIIT. Striaria attenuata 

 (Ag.) Grev. Greville (loe. tit.). Solenia attenuata Agardh., Syst., 

 1824, p. 187. 



A hand lens examination of the single scanty specimen from Orcas 

 Island, Washington, in the Herbarium of Trinity College, Dublin, 

 referred to Striaria attenuata, by Harvey (1862, p. 160) left the 

 impression that it may belong rather under Stictyosiphon tortilis than 

 under Striaria. It was very slender and seemed to be sterile. 



22. Stictyosiphon Kuetz. 



Fronds attached by numerous branched rhizoids, mostly growing 

 in dense clusters, filiform, branched, terminating in one or more 

 hyaline hairs, solid in the juvenile stage, flstulose below, growth inter- 

 calary ; plant body consisting of parenchymatous cells, the interior of 

 more or less elongated, rectangular, colorless cells and the exterior of 

 a single cortical layer of color bearing cells ; reproduction by unilocular 

 zoosporangia and plurilocular gametangia produced by the trans- 

 formation of certain cortical cells, solitary or more or less aggregated, 

 borne on similar macroscopic plants. 



Kuetzing, Phyc. Gen., 1843, p. 301. 



The type species of the genus is S. adriaticux with the type locality 

 Trieste. The northern species added later seem to belong under the 

 same genus so that there is no necessity for retaining the genus 

 Phloeospora of Areschoug (1873, p. 164). The species of Stictyosiphon 

 differ principally from those of Striaria in not having paraphyses 

 intermingled with the reproductive organs in their sori. 



Stictyosiphon tortilis (Rupr.) Reinke 



Fronds filiform, long attenuate, closely aggregated, repeatedly and 

 alternately branched, the branches bearing minute ramuli mostly 

 opposite, 5-8 cm. high, often with a small, longitudinal, central cavity 

 in the lower portions; cortical cells with branched band-shaped chro- 



