so 



SEA MOSSES. 



mingled with il in tide poob «i.d upon the rocks 

 U-lwccn tides. nicy arc distinfcn.Uhcd from tlut by 

 ,hcir ^m.,IUr an-l tubular froml.. 'l-hc-rc arc three 

 American siK-cies of this genus, common cvcowhere. 

 on both sides of the continent, and easily distin 1 



from each other. 



KNirHOMORl-HA INTFSnNAUS LtNK. 



The nrst named species is a simple unbranchcd 

 frond. Very slemler at the bottom, it gra.Uully 

 cx,«inds to the wi<llh of half an inch or more. »ome- 

 umes an inch and a half, and grows from six to ten 

 inches high. It keeps nearly of the same w.dih 

 throughout. When fouml growing in the udc pools, 

 it will usually \< seen to J« inflated, or filled w.th a.r 

 bubbles. llcing filled out in this way, and at the 

 same time a little constricted at irregular interxals, 

 it has a decidedly intestinal api^arancc. ITw color 

 is a light green, but J^ort.ons of the frond, e.pec,ally 

 ■ at the top, will often be found colorless, or white, 

 owing to the fact that the chlorophyl, or green colonng 

 matter of the cells, has been discharged. 11.6 un- 

 branched inftaUd frcnd distingtiishes this species. 

 Enteromorpiu compkessa Gr»:v. 

 In thb species the frond is compressed or flattened, 

 and is never inflated. The two layers of ccUs which 



