THAXTER. — MONOGRAPH OF THE LABOULBENIAC] I 



389 



their insertion undergoing a corresponding change in position), relatively .stout and short, somewhat 

 irregular in form, distally slightly inflated, with a more or less well-marked external elevation just above 

 the base; the tip rather abruptly distinguished, relatively narrow, the apex broadly hyaline, with coarse 

 irregularly prominent lips, the lower half black, subtended externally by a well-developed, horn-like, 

 blunt-tipped, hyaline outgrowth, which is larger than the whole tip and slightly curved outward. Recep- 

 tacle colorless or pale yellowish, the basal and subbasal cells of about the same diameter throughout, sub- 

 equal, rather long and stout in contrast to the small, compact distal portion; cells III and IV subequal, 

 or cell IV larger, the septum between them nearly horizontal, i. e. cell III is not extended upward externally 

 beside cell IV 7 ; cell V triangular, relatively small and, like cell IV, slighth suffused above with brownish 

 yellow, below the very broad, thin, clearly defined, black insertion-cell, the upper hyaline angle of which 

 protrudes between the basal cells of the appendages. Appendages similar in type to those of L. Galeritce, 

 hyaline, the outer consisting of about five to seven very obliquely superposed cells, which bear the simple 

 branches externally; the basal part of each branch consisting usually of two to three short brownish 

 inflated or squarish cells, distinguished by constrictions and dark septa, the distal part about equal to the 

 basal in length, or somewhat longer, often unicellular, hyaline, stained reddish in the types, very thick- 

 walled, slightly inflated at the base; the tip bent slightly, tapering or even slightly inflated. The inner 

 appendages similar to the outer, the basal part of the branches usually three-celled, the lowest, and some- 

 times that next above it, consisting of a single cell which bears terminally a single relatively large anthe- 

 ridium, the long stout neck of which is rather abruptly bent near the middle. Spores 90-110 X 7 

 Perithecia 175-240 X GO SO ft. The horn-like projection about 40 X 22 fi. Receptacle 325-475 fi. 

 Greatest total length of appendages 450-600 p.. 



On inferior surface of Galerita carbonaria Mannerh., Brazil; Berlin Museum, No. 9G0. 



This is one of the finest and most characteristic species of the genus, and is the only one of this section 

 in which the perithecium is provided with a tooth-like outgrowth. The basal half of the simple branches 

 of the inner appendages appears always to be composed of three cells, distinguished by black septa; but 

 the lowest branch of the outer appendage has but two such cells. The solitary antheridia are unusually 

 large, with stout necks abruptly and characteristically bent. The reddish color by which the distal portion 

 of the branches is suffused may be accidental, but is present in all the specimens examined, both young 

 and mature. It is perhaps more nearly allied to L. speciosa than to any other species and was found 

 associated with several other wholly unrelated forms. 



Laboulbenia Trichognathi Thaxter. Plate LXII, figs. 1-2. 

 Proc. Am. Acad. Arts and ScL, Vol. XXXV, p. 206. Dec, 1899. 

 Perithecium free, generally straight, long, narrow and of nearly equal diameter throughout, to the 

 base of the rather abruptly differentiated tip (sometimes, however, shorter, stout and slightly inflated), 

 pale yellowish or becoming rather deep, evenly translucent smoky brown; the basal wall-cells forming a 

 very short scarcely noticeable stalk; the tip obliquely black below the rather coarse and prominent hyaline 

 lips. Receptacle generally very long and slender, pale yellowish, the basal cell tinged with blackish 

 brown; cells IV and V amber or often becoming wholly amber-brown or smoky brown; cells IV and V 

 large, prominently marked, especially when suffused, by short transverse lines or patches which are less 

 numerous and distinct on the other cells. Insertion-cell well differentiated, black, carried out free from 

 the perithecium by the enlargement of cell V. Outer appendage consisting of a series of obliquely super- 

 posed cells three to ten in number, the basal one subtriangular and blackish, the rest hyaline or yellowish, 

 each producing distally and externally a single simple straight branch, slightly constricted at the three 

 to four lower black septa; the distal portion without black septa, sometimes short, sometimes elongate 

 and tapering. The inner appendage consists of a basal cell usually giving rise on either side to a single 

 scries of superposed cells, which may be further multiplied through the formation by proliferation of sec- 

 ondary series of superposed cells, similar to those of the outer appendage. Perithecia 165 X 55-350 X 



