(174) 



and have uot seen specimens in fruit of either kind. It is said to be 

 very nearly allied both to C. corymhosimi and C. roseum, but to be 

 abundantly different from both. From C. corymhosum its regularly 

 pinnate ramification will readily distinguish it, and from C. roseum the 

 extreme dehcacy of the filaments, the much greater proportionate 

 length of 'the articulations, and fewer tetraspores, will generally be 

 sufl&cient to distinguish it. 



We have seen no Scotch sj)ecimens, nor any from the east coast of 

 England. On the southern shores of England and Ireland it seems to 

 be less rare, and may be not imcommon, as it is very likely to be often 

 overlooked by its close resemblance to other more common species. The 

 best 2)rinid facie character may perhaps be found in the great tenuity of 

 the filaments, and the unusual length of the articulations, which renders 

 it soft and even lubricous to the touch compared with its near ally 

 C. roseum. 



CALLITHAMNION BTSSOIDKUM. 



EXPLANATION OF DISSECTIONS. 



Fig. 1. — Branchlet with tetraspores. 

 2. — Tetraspores from same. 

 3. — Braiiclilet with favellte. 

 4. — Purtiou of stem. — Plujc. Brit. All magnified. 



