NEW DIMORPHOMYCETEAE. 229 



curved outward or even recurved. Receptacle including foot, 55- 

 62 X 17-20 ju. Appendage 38 X 5.5 m- Antheridia 30 X 8 m- Total 

 length to tip of antheridia 85-90 n, to tip of appendage 100 /x. 



Female incUridual dirty yellowish with a slight tinge of brown. 

 Receptacle consisting of a rather large basal cell, the distal surface 

 of which is obliquely adjusted to the bases of three other cells lying 

 transversely; the anterior bearing the basal of the lower secondary 

 appendage, from which a small cell is usually laterally separated; a 

 middle cell which bears the perithecium, and a posterior cell, the 

 primary subbasal, which extends upward above the insertion of the 

 perithecium and is followed by the large basal cell of the primary 

 appendage, the rest of which is short, much narrower similar to the 

 appendage of the male, brownish, consisting of font, or rarely five 

 cells, the second and third distinguished by dark septa, the terminal 

 one much longer; the whole inserted in the angle made by two highly 

 developed branches which arise on either side of its base from the 

 distal end of the basal cell: these branches greatly elongated, curved, 

 forming a tuft which usually curves outward, downward and back- 

 ward, at first with much regularity; both similar, two or three times 

 branched, rather closely septate throughout, the ultimate branchlets 

 of the tAvo combined ten or twelve in number; one of these in each 

 case straight, rigid, three- or four-celled, with slightly suffused middle 

 septa. Secondary appendage simple, curved toward and A\ith the 

 branches of the primary appendage, a short two- to three-celled 

 terminal portion with dark septa rather clearly distinguished; or 

 sometimes \ariably branched, like the l)ranches of the primary ap- 

 pendage, though shorter and less Irighly developed. Perithecium 

 very large, usually slightly curved throughout the base abruptly bent 

 so that the perithecial axis is turned nearly at right angles to that 

 of the receptacle: the stalk-portion elongate, not distinguished, the 

 ascigerous portion somewhat shorter and slightly broader distally, 

 the tip clearly and abruptly distinguished by subtending elevations, 

 subconical; the apex bluntly rounded, small, not distinguished. 

 Perithecia 350-425 X 20-22 fx. Receptacle including rather large 

 foot 70-85 X 22-25 /x. Primary appendage 64 X 5 //, upper second- 

 ary, 500 to over 1000 ju: lower secondary to 150 /x. 



On the inferior tip of abdomen of Pachyieles sp. Nos. 2835 and 2821 : 

 ]\Iaraval Valley and Verdant Vale, Arima, Trinidad, B. W. I. 



Although allied to the other American species on Pachyieles this 

 species is well distinguished by its highly developed secondary 

 branches, the primary terminations of whiclj are usually recognizable, 



