NEW LABOULBENIALES. 229 



length to tip of peritliecium 05-105 /jl. Primary hranclies, longest, 

 50 )U. Total length of secondary receptacles to tips of terminal 

 branchlets, longest, 90 ^u. 



On the elytra of a minute dark species of Liadc.s, No. 1896, Corral, 

 Chile. 



This small species is well distinguished by its large short-stalked 

 perithecium, the long black stalk of C. Diplocoeli to which it is most 

 nearly related, being replaced by a small opaque area which subtends 

 the perithecium. The close grouping of the primary branches about 

 the perithecium, and the absence of branches from all but the last one 

 or two cells of the rest of the secondary receptacles, giACs it a charac- 

 teristic habit. 



Laboulbenia antarctica nov. sp. 



Nearly uniform dull olive brown, becoming darker with age, the 

 basal cell paler, the rest of the receptacle becoming obscurely punctate 

 or mottled. Basal cell usually curved below, somewhat longer than 

 the subbasal cell which is four-sided, often hardly longer than broad, 

 separated by a slightly oblique septum from cell III; which is some- 

 what broader than long, its distal margin concave; cells IV and V of 

 about ecjual length, the latter somewhat narrower; the stalk-cell (VI) 

 very obliquely separated from cell II, somewhat smaller than cell 

 III; the secondary stalk cell well defined, smaller, externally promi- 

 nent. Perithecium rather stout, subsymmetrical, the wall-cells 

 usually describing one quarter of a turn, so that a lateral view of the 

 apex is presented; the main body somewhat broader distally, the 

 black tip rather abruptly distinguished; the apex quite hyaline, 

 contrasting, symmetrical when twisted, the distal margin broad and 

 flat, the lateral lip-cells, which are anterior and posterior in posi- 

 tion, ending in conspicuous, broad " valves " which occupy their whole 

 distal margins. Insertion-cell rather thick, lying usually just above 

 the lower fourth of the perithecium, which is free above it. Basal 

 cell of the outer appendage hj'aline, four or more times proliferous 

 inward to form a corresponding crest-like series of branches radially 

 placed; the short basal cell of each branch subtended by a thick 

 blackened septum, usually proliferous and producing two or three 

 branchlets radially arranged, more often simple, distinguished, by 

 thick black septa, rather long and slender, slightly tapering, hyaline, 

 the lower septum usually black. Basal cell of the inner appendage 

 much smaller, producing a branch on either side, the basal cell of which 



