222 THAXTER. 



there is also a characteristic and deep external constriction just above 

 the prominent and rounded secondary stalk-cell, not indicated in 

 Spegazzini's figure, which appears to represent a rather small and not 

 fully developed indi\T[dual. 



In addition to the species of Corethromyccs above enumerated the 

 typical form of C. Stilici was found at Corral, as well as two other 

 species of which the material is not sufficiently good for purposes of 

 description. 



CucujOMYCEs Spegazzini. 



Abundant material of the three species of this genus described by 

 Spegazzini (Revis. d. 1. Lab. Argentin. p. 506) were obtained at Corral 

 on Ilyliota Chilensis, together with several other forms or varieties 

 on this and other hosts. A single species has also been received from 

 New Zealand which is herewith included, and still another from 

 Kamerun which is not sufficiently mature for description. There 

 are thus about ten species known, including Cucujomyces elegan- 

 tissimus (Spegazzini sub Stephanomyces). The description of Cucu- 

 jomyces which is given by Spegazzini appears to have been based on 

 a misapprehension of the antheridial characters, since it is included 

 by him in the Peyritschielleae, with which it does not appear to be 

 even remotely connected. The compound antheridia, of a type ap- 

 proaching that of Monoicomyces, which he describes, are not present 

 in any of the very numerous specimens of all ages that I have examined. 

 Simple flask shaped antheridia of the normal type are, however, 

 easily recognized in a majority of individuals, either borne terminally, 

 sometimes on shorter, slightly specialized branches, as in C. mclanopns, 

 or more often variously disposed on secondary branchlets as in C. 

 elegans. The affinities of the type seem to be rather with Ter atomy ccs 

 and SymjAcctromyces, and I was at first uncertain whether it might 

 not better be referrctl to the latter genus. The primary receptacle 

 in both these genera is, however, three celled, while in all the species 

 of Cucujomyces it is two-celled; and for this reason, chiefly, it seems 

 better that it should be separated. 



The general structure which characterizes the species of the genus 

 is as follows. The primary receptacle, consisting of a basal and a 

 subbasal cell, is terminated by a primary appendage arising from the 

 latter, which, in certain species or individuals, may give rise also to 

 a subtending primary pcrithecium. In all species the subbasal cell 

 further proliferates on either side to form corresponding secondary 



