vol. i] Setchell-Gardner. — Algce of Northwestern America. 355 



"Whether all the plants placed under this name are to be 

 included in one species may perhaps be doubted. Nevertheless, 

 it is our experience with this species on the coast of California, 

 that it varies much in size, color, shape and thickness, according 

 to the season, age, and exposure. The specimen of Miss Tilden 

 is a large fragment with good cystocarpic fruit, which is clearly 

 that of Sarcophyllis. 



Sarcophyllis pygmaea Setchell comb. nov. Plate 19. 



Port Renfrew, B. C, Butler and Policy, No. 46! 



The specimens of Misses Butler and Polley agree well with 

 the specimens of this species issued by one of us iu Collins, 

 Holden and Setchell, P. B.-A., No. 396, under Sarcophyllis 

 Ctilifomica f. pygmcea, and described later under the name of 

 Dilsea pygmcea (cf. Setchell, 1901, p. 126). Very little of the 

 horizontal thallus appears in the specimens, but in every other 

 respect the agreement is perfect. 



Constantinea rosa-marina (Gmelin) P. & R. 



On stones and shells in the lower literal and sublitoral zones, 

 most commonly collected when cast ashore. St. Paul Island, 

 Alaska. RuprecJit (1851, pp. 232, 262), Herb. I). G. Eaton] ■ 

 near Iliuliuk, Unalaska, Alaska. W.A.S. and A. A. L., Nos. 4082! , 

 4086!: Unga, Alaska, A. A. L., No. 5049a!; Uyak Bay, Kadiak 

 Island, Alaska, W.A.S, and A.A.L., No. 5092! ; Prince William 

 Sound, Alaska, Saunders, No. 298! (1901, p. 441). 



Various opinions have been held as to whether this plant is 

 to be considered as being distinct from the next or not. From 

 the materials at present accessible to us, we bold that it is to be 

 distinguished from the next by the manner of the origin of the 

 new blades. In this species, as far as we can judge from the 

 figure of Gmelin (1768, pi. 5, f. 2 and 2a) the new blade appears 

 first as a rosulate or saucer-shaped, nearly sessile structure, and 

 this is farther shown in the description and plate of Postels and 

 Ruprecht (1840, p. 17, pi. 30). In the next species, as shown in 

 plate 18, figaire 18, the first appearance of the new proliferation 

 is in the form of a subulate structure which grows to some 

 considerable length before the blade proper makes its appearance. 



