THAXTER. — NEW LABOULBENIACEAE. 411 



from a short, simple, two- to three-celled hyaline or brownish appendage. 

 The antheridia usually two, seldom three, borue singly from the succes- 

 sive cells of the receptacle, from which they are separated by a small basal 

 cell ; the venter having an external depression and not abruptly distin- 

 guished from the stout curved neck. Receptacle 35-45 X 6-7 fi. Ap- 

 pendage 25-50 fjL. Antheridia 18 X 5 /x. 



Female Individual. Receptacle consisting of a large basal cell about 

 twice as long as broad, bulging so as to form a rounded base which pushes 

 the small brownish-black foot to a lateral or sublateral position ; the re- 

 maining cells, usually eight or nine in number, separated by horizontal 

 septa and superposed in a simple series ; the lower cells greatly flattened, 

 those above somewhat less so, the series ending in a somewhat abruptly 

 narrower terminal cell, which is more than twice as long as broad, subcy- 

 lindrical, its extremity rounded symmetrically and bearing a short, simple, 

 usually four-celled terminal brownish appendage, which is distinguished 

 by a constricted dark basal septum and terminated by a somewhat inflated 

 lighter larger cell, which becomes characteristically disorganized on one 

 side, so that the appendage appears to end in a slender curved projection. 

 The remaining cells of the receptacle producing single appendages or peri- 

 thecia, except the basal and sometimes a subbasal cell. The uppermost 

 of these secondary appendages arises from the inner side of the subconical 

 subterminal cell of the receptacle, occupying a position in the median line 

 between the primary appendage and the base of the first perithecium, and 

 consists of a short subconical basal cell, from the narrow extremity of 

 which the simple, several-celled terminal portion is distinguished by a 

 constricted dark septum ; the remaining appendages laterally divergent 

 on opposite sides in such a way as to appear paired, usually three on each 

 side, each consisting of a rather long basal cell inflated along its upper 

 side so as to appear more or less geniculate, concolorous with the recep- 

 tacle, its narrower extremity suffused with dark brown, distinguished 

 without constriction by a dark septum from the simple terminal portion, 

 which is usually five-celled, more or less strongly recurved, brown, its ter- 

 minal cell becoming inflated and undergoing gelatinous degeneration on 

 the lower side, which causes it to appear split in two, the hook-like upper 

 half of the cell alone persisting in some individuals. Perithecia yellow- 

 ish, distally l)rownish, one, rarely two, in number ; the first always arising 

 from the cell immediately below that which bears the upper secondary 

 appendage, the second, when one is present, replacing one of the append- 

 ages lower down ; consisting of a symmetrically inflated venter, which 

 tapers gradually downward, passing into the short stalk ; a short neck 



