KEY TO TRIBES AND GENERA OF FLORIDE^E. 47 



stichidia. In some tetraspores the mass is divided by two lines 

 crossing each other; they are then called cruciate; in others three 

 lines radiating from the centre divide the mass; they are called 

 tripartite, and again some of them are divided by parallel trans- 

 verse lines, and are named zonate tetraspores. 



I well recollect some years ago that 1 collected a beautifully 

 branched crimson seaweed and preserved it in the usual way after 

 having examined and drawn it from the microscope. After many 

 fruitless efforts to get at the genus of the plant, I obtained 

 Kutzing's book and turned over page after page until I arrived 

 at its proper description ; it was Dasya villosa. If I had only 

 had Plate i, what a vast amount of labour I should have been 

 spared ; the conceptacular fruit being very large, I should have 

 most easily seen that the plant belonged to the tribe Rhodomelese, 

 genus Dasya; and on reference to Plate 2, I should have found 

 the plant illustrated under sub-genus RJiodonema. 



