CATALOGUE OF PLANTS. 249 



CHROOCOCCACE^. 



CHROOCOCCUS, Kaeg. 



C. turgidus, Naeg. 



Common among various algae in lagoon, Little Cranberry Isle 

 (Collins). 



GL(EOCAPSA, Kuetz. 

 G. crepidinum, Thuret. 



Common on rocks, etc., near high-water mark (Collins). 



POLYCYSTIS, Kuetz. 

 P. elabens, Kuetz. 



Among small algae, Seal Harbor (Collins). 

 P. pallida (Kuetz,), Farlow. 



Among small algoe, Seal Harbor (Collins). 



CHAM^SIPHONACE^. 



DERMOCARPA, Crouan. 



D. prasina (Reinsch), Born. Sphcenos'iplion smaragdinus, Far- 



low's Manual, 61. 

 On Polysiphonia fastigiata. Near Seal Harbor (Collins). 



HYELLA, Born. & Fl. 



Filaments .004-.012 mm. diam., forming a horizontal net-like 

 layer, from which arise vertical filaments. Cells not close to- 

 gether, as in Lyngbya, often Chroococcus-like. Forms grayish 

 stains on shells. 



H. csespitosa, Born. & Fl. 



The only species of the genus. Growing in the substance of 

 dead .shells, in company with Mastigocoleus testarum, etc. Seal 

 Harbor (Collins). 



