280 



THAXTER. MONOGRAPH OF THE LABOULBENIACEJ5. 



On mid-elytron of Diaphorus tenuicornis Chaud., British Museum (Biologia Coll.), No. 714, Oaxaca, 

 Mexico. 



This species is represented by three or four individuals in good condition and is distinguished by 

 its antheridial appendage, as well as by the short recurved appendage which subtends the tip of the peri- 

 thecium on the inner side and appears to arise from the inner lip-cell, which is lateral and overtopped by 

 the three others which appear to form the whole apex. This appendage may represent the indurated base 

 of a trichogyne, the position of which in this genus may be unusual, but I have no available material which 

 can determine this point. The terminal spine of the antheridium is long and conspicuous. In one speci- 

 men there seem to be only four rows of antheridial cells of five, four, four and three cells each. 



Eucantharomyces Xanthoph.e.e Thaxter. Plate XXXVIII, figs. 21-23. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVII, p. 26. June, 1901. 



Perithecium (not fully mature) straw colored, somewhat asymmetrical, almost symmetrically and 

 but slightly inflated from base to apex; the tip short, well distinguished; the lip-cells rounded, and slightly 

 inflated, forming a knob-like termination, one of them (the inner) protruding in the form of a slight 

 tongue-like projection beyond the others: the stalk-cell about as long as the receptacle, from which it 

 projects at an angle, being moreover turned at the same time a little to one side. The cells of the recep- 

 tacle subequal, lying side by side, the basal one extending to the base of the stalk-cell of the perithecium, 

 with which it is in contact. Appendage relatively large, the stalk-cell subtriangular, somewhat larger 

 than the basal cell which is wholly overlapped externally by the well defined and distally somewhat in- 

 flated marginal cell; the antheridial cells in four tiers of seven, six, five and four cells respectively; the 

 discharge-tube long and curved outward. Spores about 36 X 4 p.. Perithecia 165 X 50 p., the stalk- 

 cell 46 X 20 p. The appendage to tip of discharge-tube 120 p, the antheridium proper 55 X 30 p. Total 

 length to tip of perithecium 290 p. 



On the right inferior margin of the prothorax of Xanthophcea vittata Dej., Australia. Berlin Museum, 

 No. 973. 



The material of this species consists of but two specimens in which the perithecium is not quite 

 mature. It cannot, however, be confused with either of the other species in which there are more than 

 three rows of antheridial cells. 



KLEIDIOMYCES Nov. Gen. 



Receptacle consisting of two superposed cells, the basal cell (in the type) producing two characteristic 

 outgrowths, the subbasal giving rise to antheridial appendages and to perithecia. The appendage con- 

 sisting of a stalk-cell followed by a pair of cells with which a small compound antheridium is associated 

 distally, the appendage ending in a free cellular extremity above the antheridium. The stalked perithe- 

 cium similar to that of Monoicomyces. 



This genus, which has been named from the resemblance which its peculiar outgrowths bear to a 

 "wish bone," certainly cannot be retained in Monoicomyces, to which the single species was originally 

 referred provisionally, since the antheridia in the two cases are quite different. The appendage, repre- 

 sented in fig. 4 of the accompanying plate, was obtained by crushing one of the three available specimens, 

 and although little beyond the projecting lateral discharge-tube can be made out in detail, the other 

 characters of the organ are sufficiently evident. The sterile termination appears to consist of three 

 coherent rows of small cells, and in the type (fig. 3) two of these appendages are produced in addition to 

 the perithecium. The peculiar outgrowths above referred to, which are so characteristic in the type 

 are probably without significance generically, and are entirely comparable to the single outgrowth which 

 arises from the basal cell in Corethromyc.es Stilici. 



