Friesia X, 4-5

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found C. maritima to be the most frequent species. The ratio between
the number of spores of C. maritima and C. trifurcata was 10: 1 and
8: 1 in North Carolina and Georgia respectively.
Remispora stellata and Ceriosporopsis halima show high rankings
in Table 1, despite the faet that both species normally form perithecia
in the wood and are thus difficult to demonstrate. In the case of the
latter species these findings agree with those of JOHNSON & SPARROW
(1961) who considered C. halima as being one of the most widespread
and common marine fungi. In general the first 12 species in
Table 1 ean be regarded as being so frequent that all will be found
during a brief collection tour under suitable conditions (see Table 3) ,
whereas the species represented by only 1-4 collections are relatively
rare.
The frequency values are based on the presence of perithecia,
and increased knowledge of the occurrence of imperfect spore forms
could thus change the order of succession. In addition a possible
dependence upon the substrate would also change the ranking of
species in Table 1. None of the species of which a representative
number of collections is present appears to show any specific preference
for a particular species of wood. The majority grew on both
deciduous and coniferous wood.
A certain degree of substrate specialization was observed in
Amylocarpus encephaloides (23 colleetions) and Halosphaeria appendiculata
(11 coll.) which were recorded only on deciduous wood and
in Corollospora tubulata (30 coll.) , Crinigera sp. (14 coll.), and
Remispora pilleata (14 coll.) recorded only on coniferous wood. Corollospore
comata (66 coll.) must be assumed to grow chiefly on softwood
since only one collection out of a total of 66 colleetions was
from deciduous wood. These observations are in agreement with the
substrate list given by KOHLMEYER & KOHLMEYER (1964-69). It should
also be noted that Crinigera sp. (maritima?) is not treated by the
ab ove mentioned authors, and that the type was deseribed from Quercus
and Fucue vesiculosus (SCHMIDT 1969).
A further knowledge of the dependence of these species on the
substrate could be of value, since a choice of correet test fungi is of
considerable importance in the laboratory testing of specific wood
preservatives under marine conditions. These test species should be
seleeted according to their frequency of occurrence in the area in
which the wood is to be used, according to their destructive ability
and according to their specific association to the wood type concerned.