210 A NEW VARIETY OF ENTERIDIUM OLIVACEUM EHRENB. 



0"01B, crass. 0-003 millim., 3-septatae, apicibus rotundatis aut 

 obtusis. Ad corfcicem arboris prope Lomond Bay in St. Vincent 

 (cum n. 152). Prsesertim hypothallo magis evoluto a P. leiico- 

 blepharo (Nyl.) Wain, differt, et forsan est ejus varietas. Gonidia 

 globosa, diam. O-OOG-0-004 millim., protococcacea (solum simplicia 

 visa). Ad genus Piloearpon secundum descriptiones etiam species 

 sequentes pertinent : P. rotuUfonne (Milll. Arg. Licb. Beitr. n. 290; 

 Lich. Epipb. 8), P. polychromum (Miill. Arg. Licb. Epipb. 8), 

 P. aterulum. (Miill. Arg. I.e.), P. to/»t^?(ios?o//.^(Miill. Arg. Licb. Beitr. 

 n. 1522). Piloearpon et Lccanactis (Wain. Etud. Bres. ii. 90), sicut 

 etiam Pioceellea, quae sporis, parapbysibus et colore excipuli Gra- 

 phidcMs in memoriam revocant, nota gravissiiua, apotbeciis typice 

 orbicularibus, differunt a Graphidels, qnarum apotbecia typice 

 elongata aut angulosa difformiave sunt (etiam in Platijiir. jwiiclea 

 typica pr. p. irregularia sunt). Etiam inter fungos cyclocarpeos 

 species Leccmaetideis affines cognitte sunt. Ad tales pertinent Pa- 

 tellame, velut P. pndnosa Karst. Hedwigia, 1889, 193, cet. 



(To be continued.) 



A NEW VARIETY OF ENTERIDIUM OLIVACEUM Ehrenb. 

 By Arthur Lister, F.L.S. 



In tbe description of Licea flexuosa Pers. in tlie British Museum 

 Catalogue of Mycetozoa, p. 150, attention is called to tbe alliance 

 wbicb appears to exist between tbat species and Plnteiidinm ul'n-a- 

 ceuiii, and reference is given to a specimen from Glen Tanner, Appin, 

 Argyle, in tbe Kew collection, wbicb resembles Licea fiexuosa in the 

 plasmodiocarp form of tbe sporangia, and in tbe absence of a pseudo- 

 capillitium. In tbis specimen, however, tbe spores are in clusters, 

 and exactly correspond with those of Enteridium olivaceum, instead of 

 being free, as in tbe case of tbe three known species of the genus 

 Licea. Tbe Appin gathering was placed by Berkeley as Licea 

 flexiwsa, and was afterwards examined by Rostafinski, who marked 

 it as Enteridium olivaceum. Since the publication of the Catalogue, 

 the same form has been met with on three occasions, namely, in 

 a fir plantation at Leighton Buzzard, in tbe New Forest, and in 

 Lord Radnor's woods at Alderbury, Wilts. Tbe purple-brown 

 plasmodiocarps were found on decorticated logs of Scotch fir, long 

 exposed to weather and green with algte. The sporangia were 

 0-6 mm. broad by 0-3 mm. thick ; in some instances their shape was 

 linear, while in others they were extended to form a flat network 

 9 mm. long by 4 mm. broad. At Alderbury it was found in com- 

 pany with tbe comparatively simple plasmodiocarps of Licea flexuosa. 

 The only specimens I had previously examined of tbe latter species 

 were one from Germany, in De Bary's collection at Strassburg, and 

 one from Aboyne, Scotland, in Berkeley's herbarium at Kew, and 

 several gatherings made by myself in Norway. 



Tbe form under consideration differs homLicea flexuosa not only 



