238 FLORA OF MOUNT DESERT. 



LEATHESIA, S. F. Gray. 



L. difformis (L.), Aresch. 



Common in lower tide pools, all along the shore (Collins) ; 

 Sea Wall (Holden). 



CASTAGNEA, Derb. & Sol. 



C. virescens (Carm.), Thuret. 



In tide pools. Near Life Saving Station, Little Cranberry 

 Isle; near Seal Harbor (Collins). 



MYRIONEMA, Grev. 



M. strangulans, Grev. M. vulgare, Farlow's Manual, 79. 



On various algae. Little Cranberry Isle; near Seal Harbor 

 (Collins) 



ELACHISTEACE.E. 



ELACHISTEA, Duby. 

 E. fucicola (Velley), Fries. 



On Fucus. Very common all along the shore (Collins) ; 

 Southwest Harbor (Holden). 



E. lubrica, Rupr. 



On Halosaccion and Ascophyllum. Near Seal Harbor (Col- 

 lins). 



DESMARESTIACE.E. 



DESMARESTIA, Lamour. 



D. aculeata (L.), Lamour. 



From deep water. Little Cranberry Isle (Collins) j South- 

 west Harbor (Holden). 



D. viridis (Fl. Dan.), Lamour. 



From deep water. Little Cranberry Tsle; Seal Harbor (Col- 

 lins). 



