286 I I I III PWHL I I I II III I I OF FISH AND FISHERIES. 



10. (J. dirarlcaia., AG. Wood's Hole, Orient, Greenport. Very com- 

 mon all summer in warm, shallow bays. To the eye this would 

 appear to include two si)ecies. The young and growing })arts 

 are solid and. very tortuoijs, and resemble, when dried, a Meso- 

 f/Ioia. As the plant grows older the stem often becomes hollow, | 

 and many of the branches fall off, giving the plant a coarse 

 appearance. 



17. Lcathesia tiihcnformis, S. F. Gray. Washed ashore on Buzzard's 



Bay and Orient Point, but not seen growing. 



18. Elachista fucicola, ¥ribs. Wood's Hole. Parasitic on i^/^ci. 



ECTOCAEPACEJE. 



19. (Jladostcphiis rcrt'iciUatuK, AG. Orient, Gay Head. Very common 



toward Xo Mans Land. 



20. C. spongiosus, Ag. Newport. 



21. Sphacelaria cirrhosa, AG. Common at Wood's Hole and Wee- 



pecket Islands, Greenport, Orient. 



22. Myriotrichia Jiliformis, GuiFF. On Chorda lomentaria. Point Ju- 



dith, (S. T. Olney.) The only recorded case of this plant being- 

 found in America is that of Mr. Hooper, mentioned in the ap- 

 pendix to Harvey's Nereis, who found it in Penobscot Bay on 

 Bidyosiphon. In Europe it is almost always found on Chorda 

 lomentaria. 



23. J^ctocarpns UtforaUs, Lyngb. Everywhere common on Fucus. 



24. U.fascicuJatus, Harv. Gay Head and Nobska. 



25. E. DurJceei, Harv. Gay Head. 



25.* E. viridis, Harv. \Yood's Hole, {Jide D. C. Eaton.) 



PtHODOSPERME^E. 



ElIODOMELACE^. 



20. Chondrla {ChondriopsiSjAG.;) dosyph ylJa, Ag. Common on stones 

 and the larger alg?e at low-water mark. Wood's Hole, Orient. 



C. dasyphyllaj var. sedifolia. Not noticed by Harvey north of Key 

 West, but not uncommon at Wood's Hole. 



27. C. Bailcyana, ITarv. Very common, and with the last. Agardh 



refers this with a query to his Chondrlop-sis sfriidafa of the 

 Adriatic. I have compared my specimens with one of C. sfrio- 

 lata from Agardh in the herbarium at Cambridge, and it seems 

 to be the same, but further comparison is needed. 



28. C. Uttoralis, Ag. Wood's Hole. Not at all common ; a species 



easily recognized when seen, but difficult to describe. Not no- 

 ticed by Harvey north of Key West. 



29. Rhodomela suhfusca, AG. Gay Head, Vineyard Sound. 



30. Poh/siphonia urceolafa, Grev. Government Wharf, Wood's Hole, 



Orient Point. Var. formom. Orient, Nantucket. 



