312 THE JOURNAL OF BOTANY 
€ sporangium-walls, it should be placed in the Physaracee. It 
coins belong to Didymiacee, for in that Order the deposits of lime 
are in the form of crystals. From the general structure of the 
placed in a new genus. ~~ ame Colloderma is chosen in refer- 
ence ~ this gelatinous w 
the light of Mr. Gran’ S gatherings the genus and species 
may bs described as under 
Colloderma, nov. gen. sg porangia subglobose; sporangium- 
wall of two layers, the outer gelatinous, with superficial deposits of 
nular refuse-matter, and with perhaps sometimes additional 
deposits of minute lime-granules ; inner layer membranous ; capil- 
litium a network of Sinahinl and anastomosing purplish threads, 
without lime-knots; spores brownish-purple 
C. oculatum (Lippert) G. Lister. Plasmodium? Sporangia 
subglobose, 0°5 to 0-7 mm. diam. when dry, 0:8 to 1 mm. diam. 
when wet, sessile, sometimes forming short straight or curved 
r in sma 
ad e-brown membranous hypothallus; outer layer of sporangium- 
wall, when moist, thick, hyaline, gelatinous, clothed externally 
Me  Sapetatinee -olive granular refuse-matter, inner layer mem- 
branous, firm. Stalk, when present, nie ark brown. Capil- 
NOTES ON DARTMOOR BORDER RUBI. 
By Rey. W. Morte Rocers, F.L.S. 
Tate notes are mainly due to my observations during three 
summer visits to moor in recent years: the first in 1904 to 
Hey Tor, in the north-east; the second to the Okehampton and 
third in 1910, to the west and sou h-wes st, from Okehampton to 
Shaugh Bridge and Bickleigh east Plymouth. Some account 
of the Rubi seen by me in the course of the two earlier of these 
visits appeared in this J carnal at the time. But the third seems 
to me the most fruitful in interesting results; and, while I am 
recording them, it may perhaps be of interest to other die of 
the genus if I use the opportunity for a review of the particulars 
that have accumulated on the subject since the publication of 
Mr. T. R, Archer Briggs’s Flora of meek in 1880. 
