9 



a series of young plants which she had collected, which illustra- 

 ted a very interesting point in the development. The young 

 plants about 4 inches long are destitute of bladders, and look 

 like young LaminaricB of the digitate section. The stipe is slen- 

 der and short, and expands into a narrowly ovate lamina which 

 soon becomes cleft, the divisions reaching nearly to the base. 

 The young bladders begin to show themselves when the plants 

 are about 8 inches long, and appear as obovate sacks at the tip 

 of the stipe and bear on their upper margin the then compara- 

 tively broad, cleft lamina which as yet does not clearly show the 

 divisions into two parts which is seen later, 



Alaria esctilenta (L.,), Grev., f imiscefoiiay De la Pylaie, is 

 said by Foslie in '* Kritisk fortegnelse over Norges Hansalger," to 

 be identical with Fuciis pinnatiis of Herb, Gunner. 



Laviinaria platymeris^ De la Pylaie. Areschoug in Observa- 

 tions Phycologicae, part iv., p. 2, states that this species is identi- 

 cal with Z. Cloustoni, 



Laminaria caperata^ De la Pylaie, is said by Areschoug, 1. c, 

 p. 14, to be the true Z. saccharhia, 



Mesogloia Andersonii Farlow, PL LXXXVII, fig. 2. 



Fronds gelatinous, soHtaryorgregariouSjCylindrical, 3-loinches 

 long, y^ inch in diam., repeatedly and irregularly dichotomous, 

 secondary divisions occasionally subpinnate, tips scarcely at- 

 tenuated, clothed with projecting hairs when young. Cortical 

 filaments moniliform, erect, becoming somewhat recurved. 

 Unilocular sporangia at the base of cortical filaments scattered 



uniformly over the surface of frond, pyriform, 36-45 /i by 

 18-21 //. 



On stones in shallow coves. Santa Cruz, Cal, Dr. Anderson 

 1875; San Diego, Dr. E. Palmer, 1875; Santa Barbara, Miss 

 Lennebacker, 1877; Cape Mendocino, C. G. Pringle, 1882. 



This species, first found by Dr. Anderson at Santa Cruz, was 

 issued in Alg. Am. Bor. Exs., no. 163, in June, 1881. The first 

 specimens received were sterile and the generic position could not 

 be determined with accuracy. Fruiting specimens were received 

 later and it was supposed when the alga was distributed in 1 881, 

 that the specimens in Alg. Am. Bor. were all fertile, but this could 

 not have been the case, since a doubt has arisen whether the plant 



