NEW DIMORPHOMYCETEAE. 



273 



this flask shaped terminal cell is longitudinally divided, and that the 

 structure may after all prove to be a compound antheridium. It 

 should be borne in mind, however, that these appearances may be 

 misleading and the terminal cell referred to may be neither a simple 

 nor a compound antheridium; and that, if abundant material were 

 examined, compound antheridia might be developed laterally in some 

 instances. In the dozen individuals examined, no indications have 

 been seen of such an organ. A second type, on Chiliotis, Eudimer- 

 oniyces Andicolns, has apparently been described by Spegazzini under 

 Cordhromyccs; but he apparently overlooked the male, and was mis- 

 led as to the generic relationships of his form. His figure clearly 

 shows the coalescence of the stalk- and basal-cells of the perithe- 

 cium which is known only in a few unisexual genera. 



Dimeromyces Tomoderi nov. sp. 



Male indiiidual, hyaline or becoming faintly tinged with brownish 

 yellow. Receptacle two-celled, the basal flattened, oblique, some- 

 what bulging and blackened anteriorly; the subbasal hardly larger, 

 its sides converging to the base of the free appendage; which consists 

 of two subequal cells, about as broad as long, the extremity symmetri- 

 cally rounded. Antheridium single, relatively large and elongate; 

 the free stalk-cell almost twice as long as broad; the antheridial cells 

 two or three, large; the neck about as long as the venter, rather stout, 

 straight and not abruptly distinguished. Receptacle 8 X 7 m- 

 Foot 8-10 ji. Appendage 8-9 X 3.5 ju- Antheridium 28 X 5 /x- 



Female individual pale brownish yellow, the perithecium darker 

 brown. Receptacle consisting of four somewhat obliquely super- 

 posed cells, somewhat flattened, the distal bearing the simple three- 

 to four-celled primary appendage subterminally on the right side; 

 the subbasal cell bearing the single secondary appendage; which is 

 simple, four- to five-celled, nearly uniform, blunt, similar to the 

 primary one: the subterminal cell bearing the sessile perithecium, 

 which is short and stout, asymmetrical, straight or slightly concave 

 posteriorly, strongly convex anteriorly, tapering from above the 

 middle to the snout-like termination which forms a more or less 

 prominent anterior projection and is more or less oblique inward. 

 Perithecia 50-55 X 20-22 /x. Appendages 18-25 X 4 /x, the primary 

 shortest. Receptacle 20 X 14 ix, exclusive of foot. Total length 

 to tip of perithecium 80-90 ix. 



