CATALOGUE OF PLANTS. 245 



CAPSOSIPHON, Gobi. 



Frond tubular, formed of longitudinally arranged gelatinous 

 cells, which divide in two directions, the walls of the mother 

 cells persistent for a time, as in Gloeocapsa. 



C. aureolus (Ag.), Gobi. 



Resembles a slender unbranched Enteromorpha, but the cells 

 look like Gloeocapsa, being rounded, dividing by twos or fours, 

 the mother cell-wall showing somewhat after the division. 

 The longitudinal arrangement of cells is very distinct in the 

 filament, a little pressure on the cover glass under the micro- 

 scope often dividing the frond for quite a distance up and 

 down. This species seems to prefer localities where it is 

 exposed alternately to fresh and to salt water. Common on 

 stones in brook flowing from Long Pond through the beach 

 (Collins). 



ENTEROMORPHA, Link. 



E. Linza (L.), J. Ag. Ulva enteromorpha, var. lanceolata, 



Farlow's Manual, 43. 

 Very common all along the shore (Collins). 



E. intestinalis (L.), Link. Ulua enteromorpha, var. intesti- 



naliSj Farlow's Manual, 43. 



Very common along the shore (Collins) j Norwood Cove 

 (Holden). 



E. micrococca, Kuetz. 



Resembles E. intestinalis, but is a smaller plant every way, 

 rarely if ever an inch in length. The cells are very small, 

 .004-.005 mm. diameter. It usually grows in dense masses 

 on cliffs between tidemarks, in places always wet by streams 

 from above or by dripping water. Cliff near Seal Harbor 

 (Collins). 



E. compressa (L.), Grev. Ulva enteromorpha, var. compressa, 



Farlow's Manual, 43. 

 Common along the shore (Collins). 



