THAXTER. NEW LABOULBENIACEAE. 51 



with pale brownish shades ; cell II several times as long as the basal 

 cell ; cell IV bulging rather prominently externally and more deeply 

 suffused with brown. The insertion-cell deep black, broad, thick. The 

 appendages erect, their branches curved toward the perithecium: outer 

 appendage normally consisting of a main axis of three superposed cells, 

 externally broadly blackened, the blackening involving the septa and 

 adjacent external portions of the cells ; the distal cell bearing three 

 branches ; an outer and an inner simple, and a median one, once 

 branched, the outer deeply suffused about its base, which forms a direct 

 continuation of the suffused external area of the main axis; the remain- 

 ing cells each producing a simple branch distally on its inner side ; all 

 the branches long, slender, distally thin-walled and hyaline, curved 

 toward the perithecium, the lower somewhat constricted, and more or 

 less deeply suffused at the lower septa : basal cell of the inner append- 

 age half as large as that of the outer, bearing a branch on either side, 

 from the basal cells of which arise often two branchlets, similar to those 

 of the outer appendage. Spores 65 X 5 /x. Perithecia 155-165 X 55- 

 60 /x. Receptacle 290 /x. Appendages 360-435 xt. Total length to tip 

 of perithecium 400-425 /x. 



On the thorax of Planetes bimaculatus MacLeay, Java ; Berlin 

 Museum, No. 1047. 



Laboulbenia Platyprosopi nov. sp. 



Uniform transparent pale reddish amber, the cell-walls very thick. 

 Perithecium straight, wholly or nearly free, erect, the margins slightly 

 convex ; of nearly equal diameter throughout to the rather abruptly 

 differentiated short erect blackish tip ; the hyaline lip-edges outwardly 

 oblique : the base sometimes abruptly broader than the ascigerous por- 

 tion. Cells I-VI of the receptacle not differing very greatly in length, 

 except cell V, which is relatively large ; cells III and VI paired ; cell IV 

 prominent externally below the thin contrasting distinctly reddish inser- 

 tion-cell. The appendages quite hyaline, the basal cell of the outer 

 several times larger than that of the inner, and bearing two to four 

 branches in an antero-posterior series ; the basal cells of which usually 

 bear each a pair of branchlets in the same plane : the small basal cell of 

 the inner appendage producing a branch on either side bearing branch- 

 lets similar to those of the outer appendage; the antheridia crowded on 

 special branchlets, curved, hyaline, small and closely appressed. Spores 

 about 55 x 5 /x.. Perithecia 150-185 X 36-45 xx. Receptacle 150-220 



