370 PROCEEDINGS OF THE AMERICAN ACADEMY 



Callophyllis discigera, Ag., of the Cape of Good Hope, is to be 

 expected iu California. 



249. CoNSTANTiNEA SiTCHENSis, Post. and Rupr. 

 *250. Kallymenia phyllophora, Ag., Bidrag. Vancouver's 

 Island. 

 *251. GiGARTiNA ACicuLARis, Lmx. Florida, Dr. E. Palmer. 

 252. GiGARTiNA CANALicuLATA, Harv. West coast. 

 2o3. GiGAUTrNA MOLLIS, Bail, and Harv. Puget Sound. 



254. GiGARTiNA MAMiLLOSA, Ag. Boston northward ; Oregon. 



255. GiGARTiNA MIC ROPHYLL A, Harv. California. ^. wav. horrida. 

 — A very variable species. Harvey seems to have had only large and 

 tetrasporic specimens. The more common form is what I have called 

 var. horrida, which may perhaps prove to be a good species. Here, 

 the frond is not more than half an inch wide, at times almost cylindri- 

 cal, forking at the tip, and usually with a few pinme towards the base. 

 Both the main frond and pinnte are intricately covered with spines, 

 which are sometimes half an inch long and nearly cylindrical. In these 

 are immersed the concejDtacles and the sori of tetraspores, the latter of 

 which are either circular or linear. In those cases where the j)innae 

 are not so densely covered with spines as usual, the sori are thickly 

 scattered over the surface of the pinnae themselves. 



*256. GiGARTiNA Jardinf, Ag., Bidrag. California. 



*257. GiGARTiNA PisTiLLATA, Lmx. Sau Dicgo, Cal., Hasder 

 Exp. ; Europe ; Chili. 



*258. GiGARTiNA VOLANS, Ag. West coast ? Vid. Ag., Icon. Ined., 

 table xviii. 



259. GiGARTiNA SPINOSA, Ktitz. California. 



260. GiGARTiNA EXASPERATA, Bail, and Harvev. Puojet Sound. — 

 Seems to me a variety of the next. 



2G1. GiGARTiNA RADULA, Ag. West coast. — Northern limit'? 

 *262. GiGARTiNA Chamissoi, Mont. ? California, ZTarvey. 



263. Irid^a minor, Ag. California. 



264. Irid^a dichotoma, Harv. California. 



265. Irid^a laminarioides, Bory. Oregon, Mr. E. Hall. 



266. Irid^a punicea, Post, and Rupr.? Santa Cruz, Cal. 

 *267. ScHiZYMENiA EDULis, Ag. Oregon, Mr. E. Hall. — Another 



case of a common European alga, found in Japan and California, but 

 not on the east coast of North America. 



268. Chondrus crispus, Lyngb. North Carolina, fide Rev. M. A. 

 Curtis ; and northward. — Southern limit ? 



269. Chondrus affinis, Harv. California. — About this plant 



