Laguna Marine Laboratorp 209 
GIGARTINACEAE 
Endocladia muricata (P. and R.) J. Ag. 
(Figure 115) 
Common on rocks near high tide mark. Length of plant common- 
ly 2 em., diameter of stem .4 mm. 
Chondrus canaliculatus (Ag.) Grev. 
Common on the rocks of the middle tidal zone. 
Gigartina canaliculata Harv. 
With the above. 
Gigartina spinosa (Kuetz) J. Ag. 
Gigartina exasperata Harv. and Baill. 
Gigartina horrida Farlow 
The above three species are frequent on rocks of the lower tidal 
zone, 
Gigartina microphylla Harv. 
Specimens of this species frequent in the wrack along the beaches. 
Stenogramma interruptum (Ag.) Mont. 
Occasional in beach wrack. Dr. Setchell expresses doubt as to 
this determination. 
SPHAEROCOCCACEAE 
Hypnea sp. 
Epiphytie on other alge throughout the tidal zone. 
RHODYMENIACEAE 
Cordylecladia andersonii Grunow 
Frequent on rocks between tides. 
Chrysemenia pseudodichotoma Farlow 
Occasional in beach wrack. 
Plocamium coccineum (Huds.) Lyngb 
Frequent on the rocks of the lower tidal zone, and abundant in 
the beach wrack. This is the common ‘‘red sea-moss’’ of the South- 
ern California coast. Collectors will find it growing most abund- 
antly and in finest specimens on the under side of rocky ledges of 
the lower tidal zone. 
DELESSERIACEAE 
Nitophyllum violaceum J. Ag. var. crispulum. 
Epiphytic on other alge of the lower tidal zone. 
