150 BRITISH SEA-WEEDS. \_3Iela7iosjjermea. 



were growing in deep water, I could not at the time get 

 liold of them for examination. 



Genus XXI Y. LITOSIPHON, Ilarvej/. 



Gen. Char. Frond luibranchcd, cyUndrical, fiUform. Fruc- 

 tification, naked spores scattered over the sniface. Name from 

 two Greek Avords signifying slender tube. 



1. LiTOSIPHON PUSILLUS, Cami. 



Hab. In the sea, parasitical on Chorda fdiwi and other 

 AlgEc. Annual. Autumn. 



This is what was formerly called Asperococcus (?) imsillus. 

 It has now been made the type of a new genus by Professor 

 Harvey. It is got on the coast of Ayrshire, and is far from 

 being uncommon in the island of Arran. 



2. LiTOSiPHON Laminari^e, Harvey, 



Hab. In the sea, parasitical on Alaria esculenta and JJlva 

 ladnca. It has been found by Drs. Greville and Professor 

 AValker Arnott in the Prith of Forth; by Mr. Ball and Mr. 

 Thompson in Clare ; Mr. ^loore, Antrim ; Capt. Carmichael, 

 Ai)pin. 



