716 THAXTER. 



the body of the perithecium ; the hitter purphsh brown deeper above, 

 with darker longitudinal lines which indicate corresponding elevations 

 of the w^all-cells of the lower tier, the lumina of which, when they appear 

 at the margins, are distinct; the tip darker, not distinguished; the 

 apex abruptl}' narrower; the lips hyaline and somewhat irregular; 

 the trigger-appendage relatively stout, narrow and geniculate opposite 

 the lips, then erect and curved outward distally, reddish brown, with 

 a blunt hyaline tip; the whole perithecium proper rather abruptly 

 bent in the middle. Spores about 20 X 2.5 ^t. Perithecia 63-70 X 

 17 )u; trigger-appendage 100-110 X 8ju; basal cell region 90-100 X 

 18-20 ju; stalk-cell of perithecium 8 X 8 ^i. Receptacle 15 /x. Ap- 

 pendage 56-68 /i. Total length to tip of perithecium 140-175 ^t. 



On the inferior surface of the abdomen of Ilythea sp. No. 2643, 

 Kamerun. 



This species is remarkable for the monstrous development of tlie 

 basal cell region and is quite distinct from /. Saraivakcnsis, its nearest 

 ally, in several other respects. The wall-cells of the lower tier of the 

 perithecium are each slightly folded outward, forming a rather narrow 

 elevation indicated at the sides by a clearly defined lumen and between 

 the margins by two parallel lines, the included area faintly punctate, 

 but not conspicuously distinguished. 



Ilytheomyces Sarawakensis nov. sp. 



Similar to /. cicgans. Lower "portion of the basal cell combined 

 with the foot and indistinguishable from it, opaque black-brown, 

 except its perfectly hyaline upper anterior angle, which bulges out 

 abruptly below the insertion of the appendage: subbasal cell wholly 

 opaque, not prominent externally, the upper half of its inner margin 

 in contact with the base of the appendage, its base horizontal. Axis 

 of appendage strongly divergent and slightly curved outward; the 

 basal and subbasal cells opaque and indistinguishable; the andro- 

 phorous cell bearing two straight, paired, brown antheridia, one of 

 which may be replaced by one or more erect sterile branches; the 

 third cell usually producing a well developed branch on the upper side, 

 the base of which lies close against the base of the antheridia, its axis 

 consisting of four or five cells each of which bears from two to three 

 branchlets which, together with those arising from both sides of the 

 main axis above it, form a rather dense tuft; the outer branches of the 

 main axis deeply blackened, the blackening extending to a distal point 



