384 THAXTER. — MONOGRAPH OF THE LABOULBENIACE^E. 
Molokai. No. 1239; M 
M. ovivennis Sharp, Maui, Xo. 1206, and Molokai No. 1267; M 
M ecyclothorax pusillus Sharp, 
Mau 
1275-1276 
specimen 
Kaui. On the following numbers in the Perkins Collection: Kaui, Nos. 1248, 1249, 1251, 1257; Maui, 
Nos. 1214, 1228, 1264, 1271; Molokai, Nos. 1250, 1272, 1274; Hawaii, Nos. 1265, 1268. 
Reference has previously been made under the genus Laboulbenia and elsewhere to the group of 
variable forms which occur on the t 'a rabid fauna of the Hawaiian Islands. Of these the one which comes 
nearest to the ordinary "flagdlata" type is the present species, which, although it is very closely allied 
to L. Disniochi, appean to differ normally in the development of the distal portion of the receptacle 
le than a third of which, or sometimes only the tip, is free. Its coloration is very variable; the distal 
portions, including the perithelium, being most commonly very deeply suffused with contrasting rich 
black-brown, as in figs. 1 and 2, while less frequently the receptacle and all but the tip of the perithecium 
may be yellowish or reddish amber, with inconspicuous suffusions. The size is usually moderate, and 
not subject to extreme variations depending on position of growth; but one form represented in Fig. 3, 
which appears to belong here and occurs on M ecyclothorax pusillus Sharp, has a short stout rotund habit 
figured measuring about 160 X 70 p. Of the illustrations in the accom- 
panying plate, fig. 1 is taken from material on Colpodiscus tantalus from Oahu; fig. 2 from Metromemis 
ero, the Type, in which an outer branchlet is broken off, and fig. 3 as above mentioned. 
Laboulbenia Disexouii Thaxter. Plate LVII, figs. 4 and 6-7. 
Proc. Am. Acad. Arts and Sci., Vol. XXXVIII, p. 34. June, 1902. 
Perithecium three quarters or wholly free, transparent, yellowish, becoming more or less irregularly 
and for the most part rather faintly suffused with blackish brown; the tip relatively large, black, more or 
less well distinguished, the black suffusion not abruptly limited and extending some distance downward 
externally; the lips outwardly oblique, hyaline about the pore. Receptacle rather short and stout, nor- 
mal, pa e yellowish, often becoming tinged with brown distally where it is rather faintly striate. Insertion- 
ce well defined, slightly oblique. Outer appendage consisting of an erect series of usually four hyaline 
eels, each of which bears externally (the upper terminally) a stiff simple branch of variable length, curved 
outward and upward, deeply blackened externally, the notched often broadly hyaline upper (inner) 
margin contrasting: the basal cell of the inner appendage bearing a branch on either side, mostly two- 
to three-celled and resembling the outer appendage, except for the presence of basal antheridial branches 
on winch the brown anthendia are borne terminally, usually in pairs. Spores 65 X 6 p. Perithecia 
l.,()-l ,., X o8-62 (i, sometimes smaller. Receptacle 185-220 fi. Total length 290-360 a. 
On Dnnrkm frafu, Sharp, Kaui, No. 1222; D. agonoulcs Sharp, Haleakala, Hawaii, No. 1229; 
Shar^ oZ, IT l->Ir"' 1218; D ' SVlripmniS Shai * P ' Kaui ' N °- 121!,; Brosconegneus optatu, 
of tJfre'cen l r1 (,S H Vhi r h , *t ^ ^ * L H "*«*^ *&*>** to differ normally in the character 
os" n ' ; I I ' 5?°? ° f Whlch JS 1CSS WCD a-*!* ™>* <*>**«*, and wholly, or for the 
xi ,, tTJ Z per,t , uni ' , fig ; 4 reprcs<nting the onl >' e **p*> n -- «- ■ ** --. ** 
■ 'tut oft ^ **' and ?t Primary bMncfaea ° f the '*»*. « **** ^oped; some- 
ted n fiT 7 Z i. "7 ; T C ,Ct l anSe eXtemaUy - T,U> T >'l ,e on «"■"*•" «**««* " -P- 
d n i "Lh ' " n >S ° St / n e f ° me *"**-* «* these branch.cts, as well as the £» 
T^JrJZJ^***"* a,most the -kernes of variation It i a ouestion. howe 
d the precedmg were not better united under one protea 
It is a question, however, 
