38 PROCEEDINGS OP THE AMERICAN ACADEMY. 



nent. Receptacle yellowish or nearly hyaline, becoming slightly tinged 

 with brownish and faintly punctate above the basal cell, which, as well 

 as the subbasal, is relatively large, the two subequal, usually more or less 

 abruptly distinguished from the broader compact portion, the cells of 

 which are relatively small, the upper half or less of cell IV free, project- 

 ing externally to the insertion cell, which is rather small and thick ; 

 deep, slightly reddish, brown, the deep suffusion continuous with a 

 corresponding external coloration of the basal cell of the outer append- 

 age and the three to four lower cells of the outer branch, which arises 

 from it and which curves more or less strongly outward; the distal por- 

 tion curved upward, hyaline, tapering, flaccid, each of the suffused cells 

 giving rise distally, from the inner side, to a more or less erect, simple 

 (or the lower sometimes furcate) hyaline branchlet, the lower cells of 

 which are rather long and slender, inflated ; the distal portion tapering, 

 thin-walled, usually becoming flaccid ; the inner branch of the appendage 

 furcate above its erect basal cell, the branchlets divergent and similar to 

 those of the outer branch, or short and bearing antheridia usually in 

 pairs ; the inner appendage consisting of a basal cell about as large as 

 the outer, bearing a hyaline branch on either side which is usually 

 furcate above its basal cell, the branchlets similar to those of the outer 

 appendage. Spores about 40 X 4 /u. Perithecia 80-90 X 25-30 p. Re- 

 ceptacle 90-125^. Appendages 150-200 /i. Total length to tip of 

 perithecium 175-220^. 



On legs of Oasnonia subdistincla Chaud. ; British Museum, Biologia 

 Collection, No. 704. 



Laboulbenia Tachyis nov. sp. 



Form slender. Perithecium tinged with brown, relatively small, 

 narrow, erect, very slightly curved outward distally, about three quarters 

 free, tapering slightly to the relatively broad, hardly differentiated tip ; the 

 lip-cells coarse, outwardly oblique, with hyaline edges. Receptacle slen- 

 der, the basal and subbasal cells hyaline, elongate, nearly equal in length ; 

 the distal portion tinged with brown. Basal cell of the outer appendage 

 forming a characteristically modified free papillate prominence which 

 occupies the outer third of the insertion-cell, projecting slightly beyond 

 it, its inner half giving rise to a single rather short branch which may 

 bear one or two branchlets : the basal cell of the inner appendage giving 

 rise to a small erect branch on either side. Perithecia 60 X 16^. Re- 

 ceptacle 110/*. Appendages 45 p. Total length to tip of perithecium 



lOOfi. 



