32-i BRITISH SEA-WEEDS. \Chloros][}ermecB. 



vulgaris at that season is a pale yellow, the one continuing 

 red and the other yellow, when dried. P. linearis may be got 

 in abundance during the summer, becoming light olive when 

 fully grown. By the middle of April every frond of linearis 

 has vanished, and not one of the little pink sparklers is 

 seen on the rocks till the succeeding spring. There are 

 good figures of P. vulgaris and P. linearis in ' Phycologia 

 Britannica,'' PL ccxi. With us, however, they are both 

 much more glossy ; and P. vulgaris, especially early in the 

 season, is as hglit, and even more yellowish, than Lami- 

 naria j)hijllitis. I see that Dr. Greville, in Alg. Brit., says 

 that the different arrangement of the granules precludes 

 P. linearis from being regarded as a miniature of either 

 of the two. 



3. PoRPHYRA MixiAT.\. We havc a strong suspicion 

 that this is not an Alga at all. AVe got at Ardrossan a 

 beautiful specimen that seemed to answer the description 

 given by Capt. Carmichael. We spread it on paper and 

 it seemed beautiful, but, from the fishy flavour it sent forth, 

 we guess that it was neitlier more nor less than the floating 

 membrane of a Medusa, and a cat that stole it seemed to be 

 of the same opinion. 



