10s PROCEEDINGS OP THE AMERICAN ACADEMY. 



topped Bnout-like tip Blightlj upcurved. Receptacle Bbort and -tout. 

 the basal cell Bmall, Bhort, hyaline, contrasting, the real cone ilo 

 witli the perithecium, but darker and distinctly punctate with dark 

 brown Bpots. Outer appendage consisting of a series of from three to 

 about sii successively smaller Buperposed cells, from each of which 

 a Bimple tapering brown branch arises, blackened about its Bubbasal 

 septum, the successive branches superposed in a vertical external row 

 a> in A. Pachytelis, the basal cell of the inner appendage produc _ r 

 usually a Bhort one-celled antheridial branch. Perithecia 120 • l"> u. 

 Total length to tip of perithecium 200 220 /*; to insertion-cell 125/*. 

 Appendages l |l(, -l 20 /x. 



On Pachy teles par allelw, ('hand., Brit. Mus. No. 575, Para: on /'. par- 

 rectus Chaud., I>rit. Mus. No. 670 (Biologia Coll.), Pantaleon, Gui - 

 mala. On legs. 



Laboulbenia pygniaea now sp. 



Perithecium dark brown becoming almost opaque, coarsely punctate 

 throughout or only toward the base, the basal wall-cells forming a well 

 defined hyaline contrasting short neck slightly narrower than the bodv 

 of the perithecium, the tip usually not very abruptly distinguished and 

 beut very slightly outward, or straight, rather blunt, the lip-edges trans* 

 lucent, the lip-cells blackened below, especially on the inner side. 

 Receptacle veiy short and subtriangular, cell I short, slender, curved, 

 hyaline at the base, distal 1 y becoming opaipie blackish and indistinguish- 

 able from cell II, which is wholly opaque. Cells III and IV elongated 

 and lying obliquely side by side, cell III forming a more or less prominent 

 rounded projection a little below the insertion-cell, both cells becoming 

 opaque; cell V rather large, at first hyaline, becoming later Buffused 

 with brown ; all the other suffused parts rather coarsely punctate. In- 

 sertion-cell black, very broad, often becoming indistinguishable from the 

 basal cells of the appendage. Outer appendage consisting of a Bub- 

 triangular basal cell distally rounded, becoming deeply Buffused with 

 blackish brown, prominent externally ; surmounted by 8 series of 

 obliquely superposed cells close set, their long (transverse) axes some- 

 times almost perpendicular, each bearing externally a single simple 

 branch, the two lower cells of which are longer than broad, tinged with 

 brown, the septa dark and often obliijuc; the distal portion hyaline, twice 

 as long, blunt-tipped: the inner appendage consisting of a smaller basal 



cell also becoming almost entirely suffused, surmounted on either side by 

 a series of cells like that of the outer appendage aud similarly branched, 



