THAXTER. — MONOGRAPH OF THE LABOULBENIACEiD 



349 



stout, deep black-brown, except the distal hyaline lip-edges. Distal portion of the receptacle concolorous 

 with the perithecium; cells I and II much paler; cell [ longer than cell 1 1, the two forming a rather slender 

 stalk of about the same diameter throughout, above which the distal portion of the receptacle is somew hat 

 abruptly distinguished; the lighter portions marked by fine transverse striations not visible in the deeply 

 colored often opaque distal region. Outer appendage consisting of a main straight divergent axis formed 

 by usually three nearly equal cells, deeply blackened externally, bearing distally and from each of their 

 upper inner angles, a very long slender erect simple branch, which is reddish brown, paler and spirally 

 twisted distally. The inner appendage consisting of a basal cell about as large as that of the outer append- 

 age and bearing on either side a branch which may give rise to one or two erect simple branchlets similar 

 to the branches of the outer appendage. Perithecia about 150 X 55 ft. Total length to tip of perithe- 

 cium 300-390 //; to insertion-cell 275-325 ft. Appendages, longest 480-610 ft. 



On Hexagoniasp. ?, Hope Coll., No. 288, Ceylon (Thwaites) on Helluodea Nebrwides Nietn., Berlin 

 Museum, No. 1050, Ceylon. 



This species appears to suggest a transitional type between L. flagellata, or some of its forms, and 

 L. Helluodis which it approaches in the character of its appendages. The branches of the latter are 

 remarkably developed, and although in the material from Ilclluodes they are mostly broken, the spiral 

 twist of the extremities seems characteristic of this as well as of the type material, supposed to have occurred 

 on Hexagonia, although the determination in the last instance was uncertain. 



Laboulbenia Ceylonensis Thaxter. Plate LVIII, figs. 9-10. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXV, p. 1G4. Dec, 1899. 



Perithecium wholly free, suffused with smoky brown, relatively short and small, straight, hardly in- 

 flated, somewhat abruptly contracted distally to form the unusually large broad tip, the distal half of 

 which is hyaline, distinguished from the opaque black lower half by a clean cut line of demarcation: the 

 basal cells forming a short stout hyaline neck narrower than the body of the perithecium. Receptacle 

 elongate, of nearly the same diameter throughout, the basal cell nearly hyaline, the cells above it more or 

 less deeply suffused with smoky brown, cell V and the upper portion of cells IV and VII hyaline, the distal 

 suffused portion obscurely punctate. Outer appendage consisting of a basal cell deeply blackened exter- 

 nally (the blackened area continuous with the black insertion-cell and involving also the external walls 

 of the two cells immediately above it) producing from one to three branches arranged antero-posteriorly, 

 which may be once or twice branched in a similar fashion, the branchlets long, slender, drooping, hyaline, 

 some of the lower cells suffused with reddish brown: the- inner appendage consisting of a basal cell about 

 half as large as that of the outer, producing in the types a single branch which may be once branched as 

 in the outer. Perithecium 105 X 32 ft. Total length to tip of perithecium 445 ft; to insertion-cell 320 ft. 

 Greatest breadth 42 /i. Appendages 340 ft. 



On Hexagonia?, Ceylon, Hope Coll. No. 288. On elytra. 



This singular species, which belongs to the group in which L. Helluodis, L. .spiralis and L. Phmetis 

 are associated, is remarkable for its relatively very small perithecium, which is combined with a large 

 elongate, almost isodiametric receptacle. The four types examined are in moderately good condition 

 and show no essential variations. 



Laboulbenia flaccida Thaxter. Plate LVIII, fig. 5. 

 Proc. Am. Acad. Arts and Sci., Vol. XXXVIII, p. 37. June, 1902. 



Perithecium free except at its base, brown, straight, slightly inflated below, tapering evenly to the 

 broad blunt apex; the tip scarcely if at all distinguished, marked by darker shades; the lips coarse, form- 

 ing slight irregular projections. Receptacle yellowish or nearly hyaline, becoming slightly tinged with 

 brownish and faintly punctate above the basal cell, which, as well as the subbasal, is relatively large, the 

 two subequal, usually more or less abruptly distinguished from the broader compact portion, the cells of 

 which are relatively small, the upper half or less of cell IV free, projecting externally to the insertion cell, 



