(134) 
Lithophyllum daedaleum belongs to that section of the genus 
which includes Z. Racemus (Lamarck) Fosl., a group whose spe- 
cies, as at present conceived, appear to intergrade (cf. Corallinaceae 
Siboga-Exped. 60. 1904). Like others of the group, it may be 
considered a separate species, at least until the limits of variation 
of this and related forms are better known than at present. The 
species is especially allied to Lzthophyllum pallescens Fosl. and 
L. Katserii (Heydr.) Fosl. It is extremely variable and some- 
times approaches ZL. retusum Fosl. in habit. The variety pseudo- 
dentatum even resembles certain forms of Lithophyllum dentatum 
(Kiitz.) Fosl. 
The plant is at first firmly attached to the substratum by a rather 
thin, extended crust; as the branches develop, this crust seems 
sometimes to disappear, yet the plant retains a firm hold upon the 
substratum — at least, the collector has never seen specimens that 
have been naturally dislodged. In structure, there seems to be no 
limit between this species and ZL. pallescens and L. Kaiseriz. 
Lateral intercellular connections are easily demonstrable in Z. dae- 
daleum, but they are by no means so conspicuous and numerous as 
in L. bermudense. 
Lithophyllum Chamaedoris sp. nov. 
Thallus forming dull-rose or purplish crusts €0-150 4 thick: 
basal cells in part subquadrate in a vertical section, 7-10 » in dia- 
meter, in part horizontally elongated and attaining a length of 
about 12-134; perithallic cells partly and most frequently sub- 
quadrate, 7-10 » in diameter, anaee more or less rounded, partly 
elongated horizontally and then 10-12 » x 8-10 », seldom 14 # long, 
now and then with cells ecally “cloagetea: conceptacles of 
sporangia convex or subconical, 150-200 in diameter; sporangia 
2-parted, 50-60 » X 30-404. (PLATE 90, F. 1.) 
Banamas: Encircling the stalks of Chamaedoris, Cave Cays, 
Exuma Chain (xo. gor7). 
The species belongs in the section Carfolzthon and is rather near 
Lithophyllum marginatum (Setch. & Fosl.) Fosl., described 
from the Pacific Coast of the United States. 
