260 THAXTER. 



the rest deeply suffused with reddish brown, large, broader distally, 

 almost opaque; the tip-region translucent, defined above and below 

 by a clear fine dark line; the apex larger and longer than the tip- 

 region, asymmetrical, tapering rather abruptl\-, the inner two thirds 

 much darker, especially the prominent overarching upper lips; the 

 outer third concolorous with the tip-region. Perithecia 1 35-1(30 X 

 32-38 IX. Secondary appejidages, longest, 275 X 9 m- Axis, including 

 foot and primary appendage, 100-110 X 23-25 ^^. 



On the anterior legs of Packi/tcles sp., ^Vrdant Vale, Arima, Trinidad, 

 No. 2821. 



The characters of this striking species are Aery aberrant owing to 

 the presence of short unicellular branches, or protrusions, from which, 

 in the male, both appendages and antheridia, and in the female 

 appendages and perithecia, may be formed. In general appearance 

 it recalls to a certain extent certain individuals of D. pinnahis, although 

 the structure differs fundamentally, since in this form appendages 

 arise on opposite sides of the receptacle. The form and coloration of 

 the antheridia is very striking and the antheridial cells are unusually 

 numerous, at least six being present. 



Dimeromyces Caribbaeus nov. sp. 



Male individual hyaline, erect, slender. Receptacle consisting of 

 from four to seven cells, straight or slightly curved backward. Ap- 

 pendage four- or five-celled, the rounded subbasal cell distinguished 

 by a black septum. Antheridia two to six, hyaline throughout, 

 rather slender, the stalk relatively long, the neck well distinguished, 

 rather stout slightly bent. Antheridia 28 X 5.5 fx. Receptacle 

 38-45 X 8 M- Appendage 26-32 ju. 



■ Female individual almost exactlv similar to that of D. Petchi, the 

 perithecium is however less strongly bent to one side, less deeply 

 colored, the whole noticeably larger than the receptacle, the tip- 

 portion slightly but characteristically inflated, distinguished by a 

 distinct constriction and contrasting black ring at its base. The 

 basal cell of the primary appendage broadly oval, not flattened and 

 contracted distally, as in D. Petchi. Perithecium 65-76 X 20-22 fi. 

 Receptacle 48 X IS ju. Primary appendage 25-30 ^t, secondary up to 



55 m. Total length 100-120 /x' 



On the legs and inferior anterior thorax of Pcrignna sp., No. 2920, 

 Grand Etang, Grenada, B. ^^ . T. 



