3-^^8 BRITISH SEA-WEEDS. {CMorosimiuecB. 



2. Enteromorpiia compressa, Grevllle. (Plate XVI. 

 fig. 62.) 



Hab. Eocks in the sea. Annual. Spring and summer. 

 Very common. 



Very variable in length and breadth. Ey comparing the 

 fine figure of the preceding in ' Phycologia ' with an excel- 

 lent figure of this species by Dr. Greville in Alg. Brit., 

 PI. XIX., or our own, it will be seen that there is consi- 

 derable similarity; both are green, but this one is a 

 darker green ; both are attenuated towards the base, and 

 both are rounded at the top ; but the former is always 

 simple, and this one is more or less branched. In drAinsr, 

 it does not adhere well to paper. "When it decays it 

 becomes purely white, and in this state children call it 

 sea-thread. 



2. Enteromorpiia erecta, Ilooher. (Plate XVIII. 

 fig. 71, plant, natural size, with a branch on the left, 

 magnified.) 



Hab. In the sea, about half-tide level. Annual. Spring 

 and summer. Appin, Capt. Carmichael; Bute and Fritli of 

 Forth, Dr. Greville ; Torquay, Mrs. Griffiths. 



This is one of the finest of the Enteromor2:iJia^, when from 

 deep water. There are several other Eiiteromorjilue, but the 



