TI1.\XTER. — RICKIA AND TRENOMYCES. 385 



rather prominent sulcate apex subtended by four somewhat spreading 

 bisulcate proniinenees. Appen(hij,'e rehitively very hirge, the sul)equal 

 cells rounded as in the male. Perithecium, including stalk 1-10 KiOX 

 20-25 ;u. Apiicndage 30 X 20 /u. 



On Lacmohothrium atrum from Coot, New England. M. C. Z., 

 No. 1537. 



This species is most easily distinguished by its unusually large 

 appendage, which resembles a stout spore of Puccinia. It seems most 

 nearly related to T. Lipcuri, the perithecia being very similar. The 

 mode of growth is however, quite diti'erent. The rhizoids are entirely 

 broken off in all the specimens. 



Trenomyces circinans nov. sp. 



ISIale individual. Corticating cells few and irregular, producing 

 usually not more than two to four antheridia. Antheridia of the 

 usual form, the body bent often at a right angle to the slender stalk- 

 cell or sometimes recurved, the stalk 18 X 4 ju, the body 18 X 14 ju. 

 Appendage relatively small, the cells about equal, 18 X 11 M) the 

 .distal cell blunt pointed. 



Female indivickial. Swollen portion of the rhizoid bearing several 

 horizontal or upcurved lobes from which arise usually furcate smaller 

 lobes running to slender threads of no great length. Perithecia two to 

 four, usually strongly circinate when young, at maturity typically 

 bent or even recurved, rarely straight, the stalk relatively slender, the 

 body often rather abruptly distinguished, broader distally below the 

 tip, which may be subtended by a distinct elevation on one side and is 

 well distinguished, its margin usually slightly convex, separated by a 

 slight constriction from the crown formed by four symmetrically 

 placed somewhat spreading lo})es which surround the hardly promi- 

 nent apex, the whole surface of the stalk and body more or less dis- 

 tinctly roughened or granular, the walls much thickened. Appendage 

 relatively small like that of the male. Perithecium including stalk 

 225-280 X 28-35 m; the stalk 70-125 X 10 m or broader. Appendage 

 20 X 10-14 /x. 



On various parts, especially the head of Lipeurus sp., on pigeons, 

 Kingston, R. I., No. 1549; on L. baculus, Elbing, Prussia (Dr. Muller); 

 on DocopJiorus Californicus, California, No. 1555 (Kellogg No. 666); 

 on D. Montereyi, No. 1554 (Kellogg No. 264c). 



The Californian forms on Docophorus are not quite so well marked 

 as those from Prussia and Rhode Island which, by their abruptly 



