18 LIVERPOOL BIOLOGICAL SOCIETY. 
Order III. DICTYOTEA:. 
Family. DIcTYOTIDZ. 
Dictyota dichotoma, Lamour. 
I. of Man, Puffin I. (M). Locality not recorded (L). 
Order IV. PHAXOZOOSPOREAL. 
Family. HcCTOCARPIDS. 
Myrionema vulgare, Thur. 
M. strangulans, Harvey. 
Locality not recorded (M). 
M. lechlancherw, Grev. 
Hilbre I., on Rhodymenia palmata (M). 
M. punctiforme, Harv. 
On Ceramium rubrum and C. deslongchampw at 
Hilbre I. (M). 
Ectocarpus velutinus, Kutz. 
Elachista velutina, Harvey. 
Parasitic on Himanthalia lorea, Isle of Man (M). 
E. tomentosus, Lyngb. 
Common on species of Fucus at Hilbre I. and New 
Brighton (M). 
E. crinitus, Carm. 
Marrat states that some plants of this species were 
found growing in the Aquarium in the Liverpool 
Museum, but does not state whence they were 
obtained. 
E. confervoides, Le Jol. 
E. siliculosus, Harvey. 
The landing stage of New Brighton, and Eastham ; 
also at Hilbre I. and elsewhere (M). 
E. fasciculatus, Harv. 
Occasionally at Hilbre I. (M). 
