182 PROCEEDINGS OF THE AMERICAN ACADEMY. 



well distinguished by its very large and long perithecia, and the stout, 

 erect and elongate simple branchlets of the appendage, certain short 

 oblique branchlets below their origin being alone deeply suffused. 



Corethromyces Ophitis nov. sp. 



Perithecium rather slender, translucent reddish brown, tapering 

 but slightly to the hyaline blunt papillate tip; the basal cell well 

 developed, hyaline, distinguished above by a slight constriction, the 

 lower large; the stalk-cell relatively small, narrow, hj- aline distally, 

 but otherwise rich red-brown, its insertion very oblique, its suffused 

 portion united to the basal cell of the appendage. Basal cell of the 

 receptacle translucent brown, pale, somewhat longer than broad, 

 slightly bent; the subbasal cell somewhat narrower below than the 

 basal, nearl}^ or quite opaque. Basal cell of the appendage opaque 

 like the upper portion of the receptacle, and distinguished from it 

 only by an external well defined rounded prominence; its second and 

 third cells also opaque, both distinguished bj^ a similar rounded promi- 

 nence: the subbasal separated by an oblique septum from the basal 

 and associated with two cells which occupy its whole inner surface; a 

 lower, subtriangular, nearly equalling it in size, extending from its 

 base for about three fourths of its length and bearing a red-brown 

 ramiferous cell on either side; the upper much smaller and ramiferous; 

 all the branches arising from these cells hyaline, two to four times 

 subdichotoniously branched, the ultimate branchlets longer, tapering, 

 erect, the tips often abruptly recurved, some of them extending 

 beyond the tip of the perithecium; the third cell of the main append- 

 age subisodiametric, darker and abruptly constricted externally 

 above its subtending prominence, a crest-like series of branchlets 

 (usually broken) arising from its broad distal surface, the most external 

 opaque or basally suffused. Perithecium 175X28// including basal 

 cell-region (20 m)- Main appendage 70 /x, to tips of branches 170 /i. 

 Receptacle including foot 50 /x. Total length to tip of perithecium 

 275 fjL. 



On Ophites Fauvelii, in the Museo Nacional Collection. Collected 

 at Palermo by Dr. J. Brethes. 



Several specimens, only one of which is well matured, have been 

 examined. The species belongs in the section of the genus the mem- 

 bers of which occur on Crypfobia. It is most nearly allied to C. 

 purpurascens, but is readily distinguished by the characters of its- 

 appendage. 



