50 



COMPARATIVE TABLE OF 



Name. 



Branching. 



Coenenchyma. 



Verrucse. 



A. s^iinoM, Ililes. 



In two [ilaiics at ri^lit aiigU' 

 One lurniinal l"ily]i. 



Thin and 

 smooth. 



fairly 



A.fliihrllum, Iliek- 

 fou. 



A. inermis, Hed- 

 lund. 



A. brevispina, Stu- 

 der. 



A. brevifiora,'W]ute 

 legge. 



Fan-shaped in one phme, 

 with nnich anastomosis. 



In one plane, anastomosis 

 present. 



Few on one side, in one plane, 

 iiexible. 



Few, alternate in one plane. 



Thin and rough, 

 lieset with tuber- 

 culate warts. 



Of iuedium thick- 

 ness, finely granu- 

 lar under the lens. 



Extremely thin, 

 axis visible 

 through, few 

 spicules longitud- 

 inally arranged. 



Cylindrical, elongated, some- 

 what expanded at the sum- 

 mit, placed perpendicularly 

 to tlie stem, and thickly 

 crowded on all sides. 



Cylindrical, with scarcely 

 visible projecting needles, 

 eiglit bands on the body of 

 calvx. 



Spicules in eight rows each, 

 consisting of two sets of 

 converging sjiiculcs. Eight 

 apical spines not projecting 

 beyond the operculum. 



Somewhat constricted at mid- 

 dle ; with spicules arranged 

 transversely at base, not 

 distinctly seriate, peripher- 

 ally at tiji, surmounted at 

 the apex by a series of long 

 needle-like spicules. 



