NEW LABOULUENIALES. 227 



sometimes X IS/x; basal cell region U X IS^; perithccium proper 

 50-5G X 20-28 ^i. Appendages 35-70 X 5 m- 



On the elytra of Diplococlus sp. No. 1897, Corral, Chile. 



This species is most nearly related to C. elegant issimus and C. 

 ■melanopus, both of which it resembles in its well developed opaque 

 perithecial stalk. The simple antheridia are borne terminally, as a 

 rule, as in C. melanopus, and the appendages are not unlike those of 

 the last mentioned species, although they are simpler. It is probable 

 that the appenihiges of C. elegant issimus are also similar, and bear 

 terminal antheridia, but the detail of structure is not clearly shown 

 in Spegazzini's figures. The perithccium, with its transverse mottling, 

 is quite unlike that of either of these species. As a rule but one 

 perithccium matures, but when the primary one is injured, or does not 

 de^•elop, the basal cell of the first appendage of both of the secondary 

 receptacles develops one; and if these are injured, the appendages 

 next in order deA-elop one on either side, so that there may be as many 

 as five present, perfect and imperfect. The dcAclopment of the 

 secondary receptacles ^'aries considerably, since they sometimes form 

 a disc-like mass in contact with the host, and surrounding the foot more 

 or less completely, so that their true character may be almost or quite 

 obscured. 



Cucujomyces bilobatus nov. sp. 



Basal cell uniform dark brown, distally somewhat concave and 

 spreading to form two well defined lobes; subbasal cell overlapped 

 by the basal, giA'ing rise to a primary perithccium and appendage, the 

 latter simple, tapering. Secondary receptacles forming a tapering 

 axis, usually simple, turned backward and upward; two, or perhaps 

 more, of the basal cells giving rise to primary branches, mostly simple 

 with short antheridial branchlets, their basal cells proliferous on both 

 sides to form secondary branches and perithecia. Stalk-cell of peri- 

 thccium hyaline throughout, slightly broader toward the middle, the 

 walls very thick, the lumen almost obliterated distally; secondary 

 stalk-cell and inner basal cell small, about equal, lying side by side, 

 separated from the end of the stalk-cell by a slight indentation and 

 externally slightly convex; the region short, pale: the perithccium 

 stout, slightly asymmetrical; the 'neck' region much darker than the 

 venter, from which it is otherwise in no way distinguished ; the tip and 

 apex short, pale, tapering to a broad blunt extremity of e^'enly rounded 

 outline. Spores about 25X2.8//. Perithccium; stalk 50X15//; 



