114 Notes on Marine Algoe. By E. A. L. Batters. 



coccinea only the main stems are transparent and not opaque as 

 in that species. I have only found one specimen of this species, 

 it should be carefully looked for. 



Mr Holmes has kindly furnished me with the following list of 

 rare algae likely to be found at Berwick. 



1. DiCTYOSiPHONHiPPUROiDES.— Always parasitical on Chordaria 

 flabelliformis, a species it closely resembles ; it has been found at 



Dunbar, and there is no reason why it should not occur at Ber- 

 wick. 



2. DiCTYOsiPHON MESOGLOiA. — A specics very like a Mesogloia; 

 it has been found at Longniddry and should be looked for where 

 streams of sea water flow between rocks. 



3. DiCTYOsiPHON HispiDTJS. — Found at Joppa, &c. 



4. Chorda tomentosum. — This species is almost certain to 

 occur at Berwick ; I feel quite sure I saw a specimen of it in the 

 collection of the late Dr. Johnston. 



5. CoDioLUM GREGARiTJM. — An alga which forms a green film 

 on rocks, it has been found in the south of England by Mr 

 Holmes. 



6. Phlcespora subarticulata. — In his ''Flora of Berwick- 

 upon-Tweed" Dr. Johnston speaks of having found a variety of 

 Bictyosiphon foeniculaccus jointed like a Ceramium, I have no 

 doubt he refers to this species, 



7. Callithamnion luxurians. — This Oallithamnion forms a 

 pink fringe on old Zostera stems. 



8. Cladophora flexioatjlis. — An alga which always grows on 

 Cladophora rupestris, this fact may help to the identification of 

 this species, as I believe no other Cladophora grows on a plant of 

 the same genus. 



9. PoRPHTRA LEUCOSTICTA. — Very .like Porphyra laciniata, only 

 the fruit is formed in pale coloured patches in the margin and is 

 radiate. 



10. Prasiola marina. — Very like a very minute light brown 

 Enteromorpha latissima or E. compressa, but it is only a few lines 

 high ; it has been found at Dunoon, Joppa, and elsewhere in 

 Scotland. 



Areschong's " Phyceae Scandinavicse Marinse " and Crouan's 

 "Florule du Finistere," may be consulted for other species likely 

 to occur at Berwick. 



In conclusion I should strongly recommend the study of the 

 marine algse of the neighbourhood to such members of the Club 



