THAXTER. — MONOGRAPH OF THE LABOULBEN1 ACK.K. .#., 
foot 
) 
Rhizomyces crispatus Thaxtcr. Plate LI I, figs. 19-21. 
Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 434. April, I'.tOO. 
Ferithecia brownish, dimorphous cither (a) with the inner margin strongly convex, the outer nearl; 
straight or concave owing to a general outward curvature, tapering to the undifferentiated tip, the apex 
broad truncate usually symmetrically bisulcate or (b), the type, straight symmetrical abruptly enlarged 
below the narrow abruptly distinguished tip: the basal cells well defined nearly isodiametric, the stalk- 
cell large, as long or longer than the perithecium. Receptacle two-celled, the 
blackened, without rhizoids, distally geniculate through a protrusion of the distal ell below tli< insertion 
of the stalk-cell and opposite that of the appendage. Appendage erect, sometimes exoa ding the tip of 
the perithecium, consisting of a single series of superposed cells, the thr< or four lower suffused wit) 
smoky brown, the rest subhyaline, each cell except the basal one giving rise die ctly and externally to a 
branch, the insertion in successive cells being somewhat to the right and left of the median line so a t . , 
form two vertical rows, the basal cells of alternate branches being supcrpo . d; each branch consisting of a 
basal cell externally blackened, which gives rise above to a one-eelled short branchlet, bearing usually a 
pair of long, slender antheridia, the remainder of the branch curved upward blackish brown i Kepi it 
upper margin, and giving rise from its lower (external) side to a series of close-eel simple branchlet 
black, recurved, more abruptly at the tips which are slightly enlarged ami nearly hyaline, the whole sug- 
gesting the margin of a curled black feather. Spores 20 X 2.8 //. Pent! 
stalk-cell 50-85 /x. Receptacle 30 pt. Appendages 140-175 fi. 
On Diopsis sp., Brit. Mus., No. 739, Natal: Berlin Museum Xo. 850, Tang.; No. 859, Johan Al- 
brechtshohl, N. Kamerun; No. 851, Usambara; No. 858, Bismarkherg, Togo. All African. 
This species is one of the most striking members of the family from the peculiar ostrich-plume habit 
of its appendages. There appear to be two distinct types of form in the perithecia even among individ- 
uals occurring together on the same specimen of the host-insect, as is indicated in the accompanying plate. 
In the straight form the enlargement below the tip is more or less striking, ami spceinu . occur >n which, 
as in fig. 20, the enlargement is double. These differences were at first thought to be due to difference 
in the point of view, but an examination of sufficient material would seem to show that such is not th 
case. Although it is barely possible that these forms may be distinct, there appear to be do other differenc. 
in* rhizoid which characterizes the other species is absent in the present instance, and ,s 
(i5 75 
The penetratin 
replaced by the normal foot. 
SPIIALEROMYCES Thaxtcr. 
This genus proves to be well represented on hosts belonging to the S^hylinidae and though of- 
single type, the species are often well distinguished, especially by their penthec iamders 
eases it' has been difficult to determine whether forms should be referred her, or tot W/,e„,, , 
general characters being superficially smriUr in the two gene* The sermte an,l„n,l,a "'""' 
Lve to distinguish it at once, when .be material is sufficiently good to show the* n»™- . • 
even in tins respect, simple species o? the las, mentioned genus, hke ( . 8*U* a, wtaeh < - ' 
may be even solitary or serially pouped in small numbers, are not abvay- ea.ly , , ,<v I. O wmg - 
fact that the appendages are easily broken, the presence of anther, hash™ ae „., Byota . 
few instances, and the general structure has of necessity been used m referrmg man, of ,1a sp 
genus. 
Sphaleromyces Lathrobii Thaxtcr. 
Specimens correspWmg f^^'^^^^^^^^^ 
on a specimen of LathroHum quadrat urn Puyk., labeled 1 uyK Uryu. 
if so where it is, I am unable to say. The host is a European sp, 
