60 riiirirsity of Calif ornm Puhlicatians in Botany [Vol. 8 



Agardli, Disp. Alg. Suec, 1812, p. 35 ; Gomont, Monogr. des Oscill., 

 1892, p. 210, pi. 6, fig. 13 (1893, p. 230, Repr.) ; Setchell and Gardner, 

 Alg. N.W. Amer., 1903, p. 183. 



This species has only a slight claim to being considered marine, at 

 least so far as our territory- is concerned. It has occurred to us in the 

 locality noted above, but it may possibly be met with among 0. nigro- 

 viridis, Lynghya scmiplena, species of Microcoleus, etc., as it was 

 in the Whidbey Island localitj'. It may l)e that young and naked 

 trichomes of Lynghya acstuarii ma^' be mistaken for this species. 



Oscillatoria ornata (Kuetz.) Gomont has been credited to the 

 marine flora of our coast on the strength of a specimen distributed in 

 the Phycotheca Boreali-Americana (no. 1604). There has been some 

 confusion of specimens under this number, the locality being undoubt- 

 edly correct, but the statement on the label reads : "Among CladopKora 

 sp.," referring to another specimen collected at the same general 

 locality. Neither specimen, however, shows, upon careful reexam- 

 ination any filaments of 0. ornata, and we seriously doubt the existence 

 of 0. ornata at the locality mentioned. Our specimens under no. 1604 

 Phj'cotheca Boreali-Americana show two hormogonial species, viz., 

 Hydrocoleum lynghyaceuni Kuetz. and Microcoleus confluens S. and G. 



Section 2. Margaritiferae Gomont 



Trichomes constantly torulose, apex obtuse, scarcely attenuated, 

 very long arcuate, rarely either straight or totally spiral; maritime 

 species, diameter moderate to thick. 



Gomont, Monogr. des Oscill., 1892, p. 202 (1893, p. 222, Repr.). 



2. 0. Bonnemaisonii Crouan 



3. 0. niargaritifera (Kuetz.) Gomont 



4. 0. nigro-viridis Thwaites 



5. 0. Corallinae (Kuetz.) Gomont 



2. Oscillatoria Bonnemaisonii Crouan 



Trichomes usually intermixed with various other aquatic Myxo- 

 phyceae, somewhat regularly or loosely twisted, very flexible, slightlj^ 

 torulose, 18-36/ia diam., dilute olive green; apices not at all or only 

 slightly tapering, with end wall of terminal cell convex and not 

 thickened; cells 3-6/a long; protoplasm with fine granules uniformly 

 distributed. 



