New Cases of Epiphytism among Algce. 217 



Ag., on Fuciis serratiis, L. ; Elachistea facicola (Velley), Fries, on 

 Fncus vesicidosus, L. 



Off Yarmouth Roads, 1 2 fms. 



Hapalidium confervicola (Kiitz.), Arescli., on Plocaminm coc- 

 rhiemn (Huds.), Lyngb. 



At Nieiive-Diep, 2]st Aug. 



Ceramiwn rubrum (Huds.), Ag., on Cliondrus crhjJiU) (L.), Stackli. 

 (broad). Erythrotrichia ceramicola, Aresch., on Ceramium rubi'um 

 (Huds.), Ag. ; Elachistea fucicola (YeUey), Fries, on Fucus setixitus, 

 L. ; F. platycavjms, Tliur., and F. seiTatus, L., Melohesia mem- 

 hranacea (Esper.), Lamour., on Zostera marina, L. 



To the west of Heligoland. 



Ddesseria sa/iguinea, Lamour., D. sinuosa (Good, et Woodw.), 

 Lamour, and Chrysymenia clavellosa, Harv., were recorded on the 

 crustacean Hyas araneus, from a depth of 5 fathoms. 



I have repeatedly observed Delesseria sinuosa (Good, 

 et Woodw.), Lamour,, and D. alata (Huds ), Lamour., on 

 Hyas coarcfatus, from a depth of 10 fathunjs and upwards 

 in the Firth of Forth. The .specimens of these algae were 

 small in all cases, the former being relatively the more 

 minute, but they were sufficiently large to leave no doubt 

 as to their identit}'. Cystoclonium purpurascens (Huds.), 

 Kiitz., also occurs in small specimens on the carapaces of 

 living Crustacea, and sometimes also on the lighter-coloured 

 spiriform shells of some mollusca (Turitella, &c.). 



At Hehgolaud, CalUthamnidu DariesH, Lyngb., and Ceramimu 

 rubrum (Huds.), Ag., occurred on CladosfejyJiussjxmgioms (L\ght{.), 

 Ag., near the surface ; while at "VVilhelmshafen Enteromorpha 

 intestinalis (L.), Link., was found on Fuci and CaUithamnion 

 con/mhosum, Ag., on Ceramium rvh'uin (Huds.), Ag., which grew 

 on lobster boxes. 



At Sylt. 



Erythrotrichia ceriamicola, Aresch., and Lyngbya confervicola 

 (Dillw.), Aresch., were observed on Polysiphonia nigrescens (Dillw.), 

 Grev., and Ceramium rubrum (Huds.), Ag.; while in the Little 

 Belt, N.W. of Fanob, in a depth of 10 to 16 fathoms f 8th Sept.), 

 Ceramium rubrum (Huds.), Ag., and Elachistea fucicola (Velley), 

 Fries, occurred on Fuc/s s^rratus, L. 



In Apenrader Bay, 8-14 fms., 9th Sept. 



Lyngbya confervicola (Dilhv.), Aresch., was found on Furcellaria 



