RETICULARIA.] RETICULARIACE^E. 161 



2. R. lobata Lister. Plasmodium watery-white, in decayed 

 wood. JEthalia small, consisting of irregularly clustered and 

 confluent sporangia, or spreading over the substratum in flattened 

 lobes about 0-5 mm. diam., shining, iridescent, rusty-brown ; 

 walls of the sethalium membranous, soon evanescent ; sporangium- 

 walls within the sethalium rising from the hypothallus in 

 membranous folds and merging into a scanty network of more 

 or less delicate flattened threads ; together with the spores 

 rusty-brown. Spores sharply reticulated on two-thirds of the 

 surface, faintly and irregularly reticulated on the remaining 

 third, 6 to 10 ^ diam. Reticularia Rozeana List., in Journ. Bot. 

 (1891), p. 263 (non Host.). 



Plate LIX., B. d. sethalium, x 10 ; e. capillitium, x 80 ; /. spores, 

 x 600 (England). 



This species has been gathered in four consecutive years on a 

 Spanish chestnut stump in Wanstead Park, Essex ; it has been found 

 near "Woking and at Leighton Buzzard, and has also been collected by 

 Mr. Camm near Birmingham. Examples of the form were submitted 

 to Dr. Rex, who compared them with American gatherings of 

 Enteridium Rozeanum Wing., and pronounced it to be a new species 

 distinguished by the Reticularia character of the asthalia and by the 

 more uniformly reticulated spores. Specimens of E. Rozeanum, from 

 Philadelphia, Ohio, and Iowa, confirm the opinion of Dr. Rex, and 

 correct my notice in the Journal of Botany (I.e.) giving the English 

 gatherings as " Reticularia Rozeana Rost.," but the two species are 

 closely allied. 



Hal. On dead wood. Wanstead, Essex (L:B.M.132) ; Leighton, 

 Beds (L:B.M.132); Woking, Berks (L:B.M.132) ; Birmingham 

 (L:B.M.132). 



SPECIES NOT MET WITH IN THE QUOTED COLLECTIONS. 



3. R. fuliginosa Berk. & Br., in Journ. Linn. Soc., xiv., p. 82 

 (1873). Effused, thin, dark olive-brown, silky; flocci purple-black ; 

 spores globose, purple-black, smooth. 



Hal. On palm leaves. Ceylon. 



SPECIES EXCLUDED FROM THE MYCETOZOA. 



R. affinis Berk. & Curt., R. apiospora Berk. & Br., R. atro-rufa 

 Berk. & Curt., R. polyporiformis Berk., R. pyrrhospora Berk., 

 and R. venulosa Berk. & Curt. 



Subcohort lit CALONEMINEuE. Sporangia simple, except 

 in Lycogala-j capillitium always present, forming a system of 

 uniform threads; spores yellow, red, or grey. 



Order I. TRICHIACE^E. Capillitium consisting of free elaters, 

 or combined into an elastic network, with thickenings in the form 

 of spirals or complete rings. 



11 



