NEW DIMORPHOMYCETEAE. 267 



small. Appendage 12 /x. Antheridia 38 X 8.5 ju. Total length 48- 



54 m- 



Female individual nearly hyaline with faint yellowish brown sufTu- 



sions. Receptacle consisting of six or seven flattened, somewhat 

 oblique and rather irregular cells; the fourth, usually producing the 

 single secondary appendage; the fifth, and sometimes the third, a 

 perithecium. Primary appendage similar to that of the male; second- 

 ary appendage of five or six cells, the second and third squarish and 

 distinguished by dark septa. Perithecium asymmetrical, the stalk 

 not distinguished and bent somewhat sidewise; subclavate below the 

 tip, which is clearly distinguished and subtended by a conspicuous 

 transverse brown suffusion associated with a slight constriction; 

 above which the tip is slightly inflated and bent outward below the 

 hyaline slightly inflated apex; which is clearly distinguished by a 

 slight constriction, bent slightly inward, somewhat longer than broad, 

 bluntly rounded. Perithecium 80-100 X 17-19 /x. Receptacle 20- 

 25 X 12-13 /u. Primary appendage 16-20 ^t; secondary 42 X 5 )U. 

 Total length to tip of perithecium 105-125 fi. 



On the inferior extremity of the abdomen of a species of Gyro- 

 phacna received from Mr. J. B. Rorer from Port of Spain, Trinidad, 

 No. 2306. 



Owing to the basal cur\-ature of the perithecium individuals of this 

 species lie as a rule with the receptacle shown edgewise, so that it is 

 difficult to represent the normal sequence of the cells. The form, and 

 subterminal suft'usion of the perithecium, which bears a certain resem- 

 blance to that of D. Carribocus, clearly distinguishes it from other 

 species. 



Dimeromyces gracilis nov. sp. 



Male ijidividval very minute, the receptacle consisting apparently 

 of but two cells, terminating in a two-celled appendage, the basal cell 

 of which is small and nearly round, the distal cylindrical and se^'eral 

 times as long. The single minute antheridium arising from the sub- 

 basal cell, apparently sessile, with a short neck. Total length to tip 

 of appendage 22 ju, the foot 12 id. 



Female individual almost hyaline. The receptacle consisting of 

 four cells and terminated by a two-celled appendage similar to that 

 of the male and quite undifferentiated. The third cell of the recep- 

 tacle producing the single perithecium, which is long and slender, the 

 stalk-portion not distinguished, of nearly uniform diameter to the 



