THAXTKR. MONOGRAPH OF THE I. Almi |JJK\1A< !.K. ||3 
ceptack broad, distally tapering to a slender base; the basal ami snhbasd cell ibout equal in length, 
dirty yellowish ; cells 111 and VI about equal in length, much darker; the -ells above them almost opa.jui 
bulging externally below the insertion-cells, which bear numerous short, rounded a|>|>< ii<ii<iibii< . 
one or two of them larger and opaque; the branches numerous, the branehlets iniilar to those which in 
general characterize species of this section of the genns (mostly brol i n in the tvjx . IVrithceia •<• 
] 10 a, the longer spine 40 ji. Receptacle 525 /<, or over. Total length to tip of p< ritlx < inm sik) X I s 5 p. 
On the tip of abdomen of Dimities tolitariw, Madagascar (?); Sharp ' Election, No. 1(175. < >n 
North American species of (li/rimis. 
Fig. 19 represents the type of this species from Dtneittrs tmlitarivs. It is distingui*] d from other 
described species by its conical spinose peritheeium, and straight subfusiform habil. As has been pre- 
viously mentioned under />. Gyrinidarwn, I have referred to this species a form found in various part of 
North America on Gyrinus, sometimes associated with L. Gyrinidanm which, though not quite 10 large . 
appears to correspond in all essentials with the present species. The dissimilarity of the two American 
forms was first called to my attention by Professor Faull who had observe d them in ( 'anacla, but it < emed 
to me at the time that they were no more than varieti' s, an error of which I have 1>< . n eonviim d by a 
thorough reexamination of all the material available. 
Laboulbenia bicornis Thaxter. Plate IAY11, figs. 1 
Proc. Am. Acad. Arts and Sri., Vol. XXXV, p. 160. 1>. . iv«». 
Peritheeium wholly free, dark brown tinged with olive, becoming opaque, lighter at the bn ■ very 
elongate, nearly straight, slightly and gradually inflated from the neck-like .« to about the middle , 
thence tapering very slightly to the tip, which is distinctly though not abruptly differentiated: tin two inner 
lip-cells symmetrical, each terminating in a small rounded prominence which bears a second smaller 
ideel terminal prominence; from the base of the lower prominence a long slender brown or olive- 
rou 
All I 
resembling the horns of an ox; though formed from the inner lip-cells, i slight twist in the w;dl-cells usually 
makes them appear lateral or even external. The two outer lip-cells grow beyond the- inner and an' el civ 
united forming a large bluntly pointed nose-like projection, it- inner margin slightly convex, while exter- 
nally it is nearly straight and slightly oblique. Receptacle short and stout, evenly dark oli* -brown; 
cell I short, slender; cell II abruptly larger, broad and short. The b; al cells of the apj>cndagc.s opaque 
and indistinguishable, giving rise, as in allied aquatic spec* , to cladophorons prominences, the branches 
once or twice branched, hyaline, the lower three or four septa dark, the- cells beta i n them slightly mfla «k 
the distal portion elongate, cylindrical, thin-walled, blunt-tipped, without dark septa, the whole forming 
a dense tuft. Spores 125-140 X 7-8 ,i. Perithccia 340-750 X 60 75 ,«. Total length to tip of per.th, - 
ciuni, longest 1150 /i; to insertion-cell 340-400 jk; greatest width 120 130 ^ 
On Dinentes areus Klug., Brit. Mus. No. 461, Hadramant, Arabia; on Dtft**»sp., Bnt. Mm 
No. 463, Ambaca, Angola, W. Africa. On abdomen, elytra, thorax, and head. 
This large species is one of the most striking that has thus far been discovered in this gen. and 
cannot be confused with any other described form. The peculiar conformation of the t.p wtth its remark- 
able appendages is quite unique and has the appearance of a cow's head (fig. 2). 
Laboulbenia aquatica Thaxter. Plate I.WI, figs. 
Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 1.58. Dec 
IS lit 
Peritheeium free nearly to its base, rather shoi 
l>e 
xillllHi llilll 11<JC J It ell 1 J tVJ no uao^, laii.v* ^*- ^ 'It* * tl ill 
very slightly twisted, the blackened tip well differentiated; nearly symmetrical, subtnincate, the I pl- 
edges hyaline, the lip "valves" prominent. Receptacle rather short and dually broad, ohva.eous, hghter 
below. " Insertion-cell unmodified, external, about as large as and nearly symmetrical with cell \ I, 
two lying side by side above cc-ll IV. The appendages consisting of an outer basal cett ^ ^ 
formed a primary dark brown terminal prominence bearing ■vend small branches utstaUy, wfafl. about 
