No. 2] NEW SPECIES OR FORMS OF MELOBESIEAE. 1] 

This species forms minute crusts of indefinite shape which 
by and by anastomose, at length forming irregular rose-coloured 
or purplish patches on Stenogramme. The margin is frequently 
-crenulate. The plant consits of a single layer of cells except in 
the neighbourhood of the conceptacles, and do not possess cortical 
cells. Seen from above the cells are 7—12 » long and 5—7 p 
broad. On a section they are shown to be square with rounded 
Geeners, 5—S / in diameter. 
The conceptacles of sporangia are subconical, 120—150 p in 
diameter seen from above, partly scattered partly rather crowded. 
The sporangia are four-parted, about 40 » long and 25 yp broad. 
The present species somewhat reminds one in habit of Melo- 
besia zonalis, being however more delicate. Otherwise it seems 
to stand nearest to MW. Novae Zelandiae, the latter however only 
known from a rather incomplete description. 
Occurrence. Santa Monica, California, collected by Sarah 
P. Monks. 


