142 LIVERPOOL BIOLOGICAL SOCIETY. 
P. fastigiata, Grev. 
Common on _ species of Fucus (M). Extremely 
abundant at Puffin I., parasitic on Ascophyllum 
nodosum (G). Locality not recorded (Li). 
P. formosa, Suhr. 
Locality not recorded (M and L); Puffin I. (G). 
P. fibrata, Harv. 
Hilbre and Puffin Is. (M and ©): 
P, fibrillosa, Grev. 
Locality not recorded (L). 
Dasya coccinea, Ag. 
Marrat records two varieties, one a bright rose red, 
the other a dull purple, from the I. of Man, Hilbre 
and Puffin Is., and elsewhere. I found the rose red 
variety to be one of the commonest of the Rhodo- 
phycesee on Puffin I. Marrat remarks that ‘the 
Hilbre Island plants are not like either the Manx 
or Devonshire forms.’”’ Locality not recorded (L). 
Family. CORALLINIDA. 
Melobesia farinosa, Lamour. 
General on the coast (M). 
M. membranacea, Lamour. 
General on the coast (M). Puffin Il. (G. 
M. pustulata, Lamour. 
Parasitic on Phyllophora mulbone, at Puffin I. (M); 
also on various other Rhodophycexe at the same 
locality (G). I confess to having some doubts as 
to the advisibility of separating ‘these two forms, 
M. pustulata and M. membranacea. Croall and 
Johnstone (Nature Printed British Seaweeds) con- 
sider the latter as an ‘‘ imperfectly developed state”’ 
of the former. : 

