AI 
Ceramium botryocarpum Griff. 
Dudresnaya verticillata Le Jol. 
Melobesia favinosa Lamour. 
Melobesia corallinae Solm. 
M. minutula Foslie. 
Lithophyllum incrustans Foslie. 
Lithothamnion colliculosum Fosl., var. vosea Batt. 
L. lichenoides Fosl. var. agariciformis Fosl. 
Corallina squamaia Ellis. 
It will be seen that the new records include a number 
of microscopic species whose absence from previous lists 
is no doubt due to lack of critical microscopical examina- 
tion. Many of these species are endophytes or epiphytes 
of minute stature ; some were previously regarded as the 
reproductive phases of the hosts on which they live and 
only recently have been raised to the dignity of independent 
genera. 
The macroscopic additions are not without interest. 
The inclusion of some new names in the list is doubtless 
due to the fact that new areas have been laid under 
contribution. Monospora pedicellata for example, is 
locally abundant at Pooyllvaaish, but has not been recorded 
elsewhere in the Island. It is probable that as the field 
of operations is gradually extended to include all the 
small bays that indent the coast, the names of other 
locally restricted species may be added to the list. 
This explanation does not, however, suffice for all the 
newcomers. It is believed that there have been real 
additions to the flora of the Island. A few years ago, 
Colpomenia sinuosa made its appearance on the Castletown 
coast (see Cotton, 1908, 1911). It was then represented 
only by occasional individuals; but within the space of 
five years, it has spread so widely that it is now a common 
component of the summer flora in the littoral zone in 
four of the collecting areas. 
Other plants whose frequency on the shore has shown 
marked increase of late are Calliblepharis lanceolata, Halurus 
