230 THAXTER. — MONOGRAPH OF THE LABOULBENTACE.E. 
and aiv associated with similar segments having no such function. This function, furthermore, ap- 
pears 
soon 
ifter fertilization, and the appendage develops more or less copious sterile branches and loses 
all traces of its primary function, figs. 7 and 16; a statement which, it may here he mentioned, applies 
also to the supposed anthcridia of Hydwpliilomxjces . 
The associations of antheridial cells which form the functional portion of the often highly de- 
veloped compound anthcridia are in general very definite, and the numbers of the latter may be, and 
usually are, more or less invariable in different genera or species. They arise, like the simple an- 
theridia, as branehlets, which, instead of growing outward, penetrate an adjacent cell, opening and 
discharging into its cavity, whence the sperm-cells escape by a variably developed, often tubular 
and elongate outlet, that is sometimes a mere extension of the cell forming the common cavity, 
or in a few instances involves other cells. An illustration of the last condition is seen in the 
antheridium of Euhaplomyces, Plate XXXVII, fig. 21, a type not previously illustrated. Another 
new type is seen in the genus Rickia, the antheridium of which is quite unlike that of the nearly 
allied PeyriisekieUa; not, as in this genus, adnate to the receptacle, but borne quite free upon it 
and distinguisncd by a broad black septum, Plate XXXIV, figs. 12-13. In general form it closely 
resemble, a simple antheridium of the ordinary type, but the several antheridial cells which compose 
it are nevertheless clearly distinguishable. The singular condition seen in the closely allied Distich- 
omyee*, with its groups of apparently simnl* ami f,™ o„+k„..;,k„ u i_„_j.. . , , , , 
rn 
™ sl " ' "" lrk " llle . *»»«", among the new types niustatfed, are those found in the two new 
genera. M,„ mm ,m r r, and Eumonoicomyces, Plates XXXVI and XXXVII, the detailed structure of 
winch , s desenbed under these genera. This type, which in Evmmoieomyce. Papua,*, is more 
completed than that of any other form, differs widely from those previously illustrated, bod, in 
the arrangement of the antheridial eells, and in the method of discharge between four terminal and 
eventually appendiculate eells. Still another new type is found in the singular Kleidimyce,, but 
unfortunately the cell relations here are not determinable from ,I, e SC an,y material available.' Lastly 
the many new species of ******* illustrate very fully the muttons in this highly devel- 
oped type ,„ whteh the usually „bli q „ e rows of cells which give it such individuality, appear to 
n pn-.se,, the mter eal ary segments of an original branchlet, that becme converted directly to anthe- 
ruhal cells which discharge inward. 
ridiat' o,',i, fitty ; f "" r gemTO " ,US '" dMn «"' sh ' ] «*" are five in which the character of the anthe- 
,qte unknown namely, Polga****, Smnng***, Uugon^ce., Eundi**,*., an,, AV- 
H,^, m , lex Cent**,*., AvMvm/e*, „ n ,l Hyirophib*^. 
the pn™l ,:" "Tt ^ gCMral aCC ° Unt «««*•>- of the origin and deve - of 
been lamed "o J^T^ ""^ ""'' ** ™ M °™*°° "> «* " «*» ta 
**mUm of which JTbL inTT 7 '""""^ '^^ '" ^ "' Amm P^'^ *e clavatc 
«ive vesicles, which ,Ih fint J7 ^T^ "^ "* **• ^ 8 ^ l2 > «* «^ 
A most ,!„„,„„. 2 .'","' S ' ght ' ,e "- *» ^'.gating spcrm-CU 
Ill 
A most ,inm,lo. a ^ * ^"jugaung sperm-cells. 
7 temalc branch, but also the sterile eells of the perithecium, originate endoge- 
