VERMES 111 



are seldom common along our coast. A few of 

 the more easily recognized arc described below. 



PLATYHELMINTHES 



(Flat worms) 



Plat, unsegmented worms, most of which are 

 parasitic, such as the Tape Worm, Liver Fluke, etc. 

 A few are free-living and can be found along most 

 sea coasts. 



Leptoplana variabilis Girard 



PLATE XI. Fig. 3 



A yellow leaf-like flat worm about an inch long 

 by half an inch wide, occasionally found living* on 

 Ulva (Sea Lettuce) or other algae 



Bdelloura Candida Girard 



PLATE XI. Fig. 5 



Elongate with anterior end tapering and pos- 

 terior end with an adhesive disk. Lives on the gills 

 of the King Crab (Limn/us polyphemus). Thought 

 by some to be parasitic, but probably merely a com- 

 mensal form doing no harm to its host. 



Syncoelidium pellucidum Wheeler 



Smaller than the above (% inch long) and 

 tapering to both ends. Also found on the gills of 

 the King Crab, but not as common as the preceding. 



