6 CARL SKOTTSBERG, MARINE ALGJE 2. RHODOPHYCEiE. 



coast of Chile, that seems to be distinct from G. filicinum of Bory, Voy. Coq. p. 102, 

 the native country of the latter being unknown - - see also Howe, 1. c. p. 95. 

 Distribution: Peru, Central Chile (first record). 



? G. intricatum KtJTZ. Spec. Alg. p. 767. 



C h i 1 o é : Quemchi, among litoral boulders, forming dense mats together with 

 Catenella and Bostrychia (St. 30 b, 19.7.08). 



Only sterile material. The strueture is that of Gelidium rather than of any other 

 genus. It is a small, almost terete, irregularly branched species, as shown by Kut- 

 zing's figure in Tab. phyc. XVIII, p. 35; my specimens have a creeping stem, attached 

 to the rock with numerous hapteres and sending forth more or less pinnately branched 

 fronds. 



Distribution: »Ad insulas Franciae, Sandwich et Ravuk» (Kutzing). Montagne, 

 Hist. de Chile Bot. VIII, p. 331 quotes G. intricatum from Chile. 



G i g a r t i n a c e a e. 



Iridaea Bory. 



After I have examined a large material I still find it very difficult to draw any 

 fixed limits between /. cordata, laminarioides, micans and Augustinae; but extreme 

 types are so unlike each other that nobody would like to unite them under one and the 

 same specific name. According to Cotton, Crypt. Falkl. p. 177, Professor Setchell 

 proposed to separate /. Augustinae on account of its rough surface, but »at times it is 

 smooth except very near the base». The plants I have named Augustinae have a ciliated 

 margin, small processes sometimes present also on the surface, making it rough. Under 

 I. laminarioides proper I retain plants corresponding with Bory's type material (young 

 specimens in Herb. Agardh, no. 23257!) and with his figures in Voy. Coq. tab. 11. The 

 margin is smooth, the stipe well developed, the texture thick, coriaceous or cartilaginous. 

 This appears to be the same form as called laminarioides s. str. by Western American 

 algologists. The remaining forms are brought together under /. cordata. Among them 

 are some plants exactly matching Turner's figure, Hist. Fuc. II tab. 116, and others 

 clearly corresponding to /. micans of Bory, 1. c. tab. 13, all with a short stipe and a cor- 

 date base; but some have the frond gradually narrowed into a cuneate base, very much 

 resembling I. micans [3 obovata Kutz. Tab. phyc. XVII t. 9, or /. micrococca Kutz. 1. c. 

 t. 12. Finally, there are specimens with a more or less dissected frond, included under 

 var. dichotoma Hook. Fil. et Harv. Fl. Ant. II, p. 485, but different from the true /. 

 dichotoma, which is, perhaps, an ultimate link of the series. 



I. cordata (Turn.) J. Ag.; Hohenacker, Alg. mar. sicc. VII no. 334 (tnicans). - - Kylin 

 & Skottsb. p. 7. 



In smooth or slightly agitated water, common in tide-pools or in the upper sub- 

 litoral, one of the more important species of subantaretie America. South P a t a- 



