176 
ENDOSPOREiE. 
[hemitrichia. 
Hal. On dead wood.— Orton, Leicester (B. M. 335, 338) ; Rudloe 
Wilts (B. M. 340) ; Batheaston, Somerset (B. M. 341) ; Wanstead' 
Essex (L:B.M.145); Hampstead, London (B. M. 1123); Boynton' 
Yorkshire (B. M. 112G) ; France (K. 123) ; Germany (B. M. 791 700) • 
Italy (B. M. 789) ; Finland (B. M. 788) ; Poland (Strassb. Herb ) '• 
Iowa (B. M. 830) ; Texas (B. M. 956) ; S. Carolina (B. M. 761). 
2. H. intorta Lister. Plasmodium watery- white. Total height 1 
to 1-5 mm. Sporangia turbinate, stipitate, gregarious or scattered, 
0-3 to 0-7 mm. diam., shining, yellow or olive-yellow ; sporangium- 
wall membranous above, thickened with granular deposits towards 
the base, papillose on the inner side. Stalk thickened above and 
below, with two to four broad longitudinal furrows, 0-5 to 0-7 mm. 
long, 0-15 mm. thick in the middle, glossy, purphsh-brown, solid, 
not filled with spore-like cells. Capillitium a twisted tangle of 
sparingly branched orange-yellow threads, 4 /x, diam., marked 
with four to. five more or less distinct, closely set, spiral bands, 
sometimes connected with longitudinal striae, densely spinulose or 
nearly smooth. Spores yellow, minutely warted, 9 to 13 /x diam. 
— Hemiarcyria intorta List., in Journ. Bot. (1891), p. 268. Hemi- 
arcyria longijila Rex, in Proc. Acad. Nat. Sc. Phil. (1891), p. 396. 
a. genuina: spirals on elaters distinct, usually spinulose; 
spores 9 to 10 /A. 
p. leiotricha : spirals on elaters indistinct, smooth ; spores 
12 to 13 /A. 
Plate LXIII. , B. — a. a. genuina, sporangia, x 20 ; b. capillitium and 
spores, X 600 (England) ; c. leiotricha, sporangium, x 20 ; d. capilli- 
tium and spores, x 600 (England). 
The var. genuina appeared in considerable abundance near Hitchin 
in March 1889 and January 1890. It was also gathered near Bir- 
mingham by Mr. Camm in October 1889, and was described in the 
Jour7ial of Botany, September 1891. A few months later it was 
independently recorded in Proceedings of the Academy of Natural 
Science of Philadelphia by Dr. Rex under the name of H. longijila. 
Specimens received from Dr. Rex, and Prof. Macbride, of Iowa 
University, are essentially identical with the English gatherings. 
The var. leiotricha is a form which has been met with on five 
occasions — three times in a larch plantation near Lyme Regis, once 
in a fir wood at Leighton Buzzard, and on dead leaves at Sande, 
Norway. In external appearance it resembles var. genuina ; the 
capillitium is profuse and of a bright yellow colour. In the Lyme 
Regis gatherings the threads are almost smooth, with a faint in- 
dication of spiral markings ; free ends are more numerous in some 
sporangia than in others. In the Leighton gathering the threads in 
some cases are nearly smooth, and more or less in the form of long 
branching elaters of the type of Trichia ; in others they have the true 
Hemitrichia character, with few free ends. They are marked with 
distinct spirals (represented PI. LXIII., B, fig. d). This form would 
come under the description of H. intorta, except in the size of the 
spores, which measure 12 to 13 /x. Until further material can be 
met with, it is placed as a variety of H. intorta, with which it is very 
closely allied. It is interesting as affording another instance of the 
Trichia and Hemitrichia characters being exhibited in one species, aa 
