160 Mr George W. Traill on the [sess lii. 



39. Chorda tomentosa, Ag. 



On submerged rocks a little beyond the low-water mark 

 of spring tides at 4, 5, 8, 9, and 10. Annual. I have 

 seen the plant from May to August only, and two 

 forms would seem to occur. 



40. Chordaria Jiagelliformis, Ag. 



In pools between tide marks ; common. Annual, 

 April to November, and sometimes later. Mr Holmes 

 found capsules in August in one of my Elie plants. 

 A handsome ramillose form occurs here, having its 

 main stem nearly straight, and carried up much 

 higher than in the typical plant, from which it also 

 differs in the ramelli being more numerous, and in 

 their being pointed and sharp at the tips. 



41. Chondrus crisjms, Lx. 



Common on rocks between tide marks. Perennial. 

 Fruit in spring and winter. 



42. Chj/locladia clavellosa, Harv. 



Growing at 7, at very low tides, on rocks, stones, and Algre. 

 Annual, April to Oct. Fruit in July and August. 



43. Cladojjhora albida, Huds. 



At 12, according to Dr M'Bain. 



44. Cladfljyhora arda, Kutz. 



Not unconnuon at 10 and 12, in pools near low-water 

 mark. Annual, March to October. 



45. Cladophora fjlauccscens, Grif. 



In pools at 12, rare, according to Dr M'Bain. Annual, 

 summer. 



46. Cladophora Icetevircns, Kutz. 



Common on rocks and Algic in pools, usually at about 

 half-tide level. Annual, March to December. Many 

 plants survive the winter. Fruit in summer. Young 

 plants, and new shoots on plants of the previous 

 season, have their ramelli secund ; all the ramelli 

 being produced on the inner side of the ramulus 

 previously to those on the outer side. 



47. Cladophora lanosa, Kutz. 



Not uncommon, especially at 4 and 12, near low-water 

 mark. Usually epiphytic on rolyides rolundus, Fiir- 

 rAl((ria fasiiyiata, and Ahnfeldtia plicata. Annual, 

 April to August (G. W. T.) ; spring (Crouau). 



