BOT.-VOL. II.] HUS-POKPHYKA. 219 



of antherozoids in each antheridium, which the author pro- 

 poses as a criterion for the species of Porfhyra, is not 

 mentioned. But, since the specimens do not agree with the 

 description of Diplodenna amplissimiim by Kjellman, and 

 since it is evident that they cannot belong to P. tcmiissima 

 (Stromf.) S. «& H. or P. abyssicola Kjellm., the writer has 

 deemed it advisable to assign the name P. miniata to these 

 specimens, until such time as others who have access to the 

 type-specimens may determine its rightful position. 



This species differs from the preceding one in color, in 

 being less deeply folded, and in possessing a crenulate mar- 

 gin which gives the fronds a very characteristic appearance. 

 It differs from Kjellman' s description of P. miniata in 

 being monoecious, and in possessing a strongly cuneate base. 

 These two characters were deemed sufficient to differenti- 

 ate the plant under a form name. 



Sporocarps. — The sporocarps contain four carpospores, 

 formed by a cruciate division of the mother-cell (PI. XX, 

 fig. 14; PI. XXII, fig. 23). 



Antheridia. — The antherozoids appear here in groups of 

 eight arranged in two tiers of four each, thus showing in 

 cross-section four antherozoids (PI. XX, fig. 14; PI. XXII, 

 fig. 25). At first it was thought that this appearance was 

 due to an unripe condition of the part of the frond exam- 

 ined, but a large number of sections from carefully selected 

 portions of the frond showed the same character. 



Sometimes sixteen antherozoids were found in one anther- 

 idium ; but in that case they were arranged in two tiers of 

 eight each. This showed that the double number of anther- 

 idia was caused by the fact that the last vegetative division 

 in the antheridium-mother-cell did not take place. 

 Habitat. — Found floating. 



Distribution. — From Alaska southward to middle CaH- 

 fornia (6o°-36° 45' N. lat.). 



Localities.— Lo^Q Inlet, Gulf of Alaska (de A. Saun- 

 ders, No. 20!); Coupeville, Washington (N. L. Gardner, 

 No. i99«!); Monterey Bay, California (Mrs. J. M. 

 Weeks!). 



