RHODOSPERMEZ. 173 
will now be obtained only by dredging. The colour of this rare plant is 
much more decidedly inclined to a reddish tint thar any of the others of 
this genus, and, like all the rest, it adheres very imperfectly in drying. 
Fic. 160. Gigartina Teedit. 
G. mamillosa is the common species of this group; Fig. 161 represents a 
frond of this plant. It is generally found in company with Chondrus crispus 
(Fig. 162), and forms with that species the carrageen or Irish moss of the 
Fie, 161. Gigartina mamillosa, 
druggists’ shops. The fronds are tufted and are of various dimensions ; 
they are all more or less covered with mamillez or little tongue-like pro- 
cesses, which arise from the margins and broad surfaces of the upper 
