386 PROCEEDINGS OF TKE AMERICAN ACADEMY. 



curved habit, slender stalks, and roughened surface, are clearly dis- 

 tinguished from other species of the genus. The tip of the perithe- 

 cium in well developed specimens is not unlike that of Arthrorhynchus 

 Eucampsipodae, but the conformation varies considerably and com- 

 paratively few specimens have a well defined subterminal hunch. 

 Several specimens on Docophorus colymbinus, Nos. 1556-7 (Kellogg, 

 Nos. 14a and 12a), differ distinctly in that the tip is unmodified and 

 hardly distinguished, the stalks stouter and less well distinguished. 

 Further material may indicate that this form is distinct. 



Trenomyces gibbus nov. sp. 



Male individual unknown. 



Female individual. General structure like that of T. histophorus. 

 Swollen portion of the rhizoid producing several, horizontal lobes. 

 Corticating cells very irregular, completely concealing the somewhat 

 irregular basal cell, giving rise to numerous perithecia. Perithecia 

 faintly tinged with yellowish, stout elongate, the stalk not distinguished 

 from the body, the whole indistinctly roughened, and having the 

 appearance of a goose's neck and head owing to a subterminal protru- . 

 sion which causes the tip and apex to be bent to one side at an angle 

 45° or more; the tip nearly symmetrical above the protrusion, broadly 

 conical, the apex rather narrow, subtruncate, slightly indented. 

 Total length of perithecium 300 /x, including stalk, which may be 30 jx 

 broad just above its origin; the tip above the hunch, 32 n long, the 

 base 28 to 30 ju broad, the apex about 7 /x. Appendage 25 X 10 ^u. 



Described from a single female on Lipeurus longipilus. No. 1563 

 (Kellogg, No. 128d), California. 



This form is so peculiar that I have not hesitated to describe it 

 from a single well developed female *n good condition. There are a 

 dozen or more perithecia on the specimen in various stages of develop- 

 ment, the four which are mature suggesting the heads and necks of a 

 flock of geese. The distal cell of the appendage is somewhat longer 

 than the basal, tapering from base to apex. 



