HOW TO KNOW THE SEAWEEDS 



15b Thallus firm; branching regular; ultimate branches long. Fig. 26 

 Chordaria 



Fig. 26. Chordaria flagelliformis (Miiller) C. 

 Agardh 



A small upper portion of a plant about 40 

 cm. long showing the smooth, slender, long 

 branches, X 0.6. Found on the New England 

 coast. C. dissessa Setchell & Gardner, a spe- 

 cies of somewhat irregular diameter and flat- 

 tening at the points of branching, occurs in 

 the Puget Sound area of Washington. 



Ftgure 26 



16a Thallus simple, or furcately branched. Fig. 27. 

 Nemalion 



Fig. 27. Nemalion helminthoides (Velley) Batters 



An entire plant, X 0.6. Frequent on rocks at 

 rather high int^rtidal levels along the Pacific 

 Coast. A similar but more abundantly branched 

 species occurs on exposed rocks along the New 

 England coast and is known as iV. multifidum 

 (Weber & Mohr) J. Agardh. 



Figure 27 



35 



