222 THAXTER. 



neck. Antheridia 38 X 8 fx. Receptacle 13 fx. Appendage 20 fi. 

 Total length 51 /i. 



Female individual pale yellowish. The basal cell of the primary 

 appendage similar to the subbasal cell of the receptacle, two small 

 cells separated distally, the upper abruptly attenuated. Secondary 

 appendages stout, mostly curved away from the perithecium, some- 

 what irregular in outline, six to nine-celled. Perithecium single, 

 next the primary appendage and lateral, the stalk not distinguished, 

 the distal third, or half, tapering very slightly to the broad termina- 

 tion, the margin of which is slightly convex, angular on the outer, 

 and subtended by a variably developed short nearly cylindrical pro- 

 jection on the inner side. Perithecia 64-75 X 17 ^t. Primary ap- 

 pendage 25-35 X 8 M- Secondary appendages, longer, 105 X 10 ^t at 

 base. 



At the tip of the abdomen of a small aleocharid. Grand Etang, 

 Granada, B. W. I. 



The host of this species, which was captured by sweeping in the 

 forest about the Grand Etang, has been unfortunately lost or mis- 

 laid. The characters of the species are quite distinctive, the stout 

 curved undifferentiated secondary appendages, the compressed termi- 

 nal subulate cell of the primary appendage in both sexes, the very 

 long slender neck of the antheridium, and the small well defined pro- 

 jection from the inner angle of the apex of the perithecium, serve 

 clearly to distinguish it. The conformation is such that the individuals 

 do not lie flat, and a complete side view of the female cannot be 

 obtained. 



Dimorphomyces simplex nov. sp. 



Male individual short and stout, uniform pale yellowish brown. 

 Receptacle consisting of two or three cells, and bearing one or two 

 antheridia, the basal short and protruding externally beneath the 

 base of the cell or base of the antheridium above it. Appendage 

 rather short, erect, two-celled. Antheridia stout, erect, or but slightly 

 divergent, the stalk-cell clearly defined, the efferent portion of the 

 neck bent abruptly sidewise. Receptacle, without foot, 19 /x. An- 

 theridia, to curvature of neck, 20-23 X 8 ;u. Appendage 12 ^i. 

 Total length to curvature of neck 38 /x. 



Female individual uniform pale yellowish brown, the body of the 

 perithecium and distal cell of the appendages darker. Receptacle 

 short and broad; the basal cell short, its extension clearly defined. 



