288 



MONOGRAPH OF THE LABOULBENIACE^E. 



mouth, which is usually, hut not always, bent abruptly outward almost at right angles to the 

 nearly straight inner margin of the perithecium. A short, straight, bluntly-pointed, rather 

 stout appendage arises on one side only of the perithecium, just below this tubular apex beyond 

 which it projects. The basal and sub-basal cells of the receptacle about equal in length, the lat- 

 ter broader : distal portion of the receptacle composed of the usual four cells, the sub-termi- 

 nal cell forming a distinct external prominence below the terminal cell, which is bent toward and 

 partly overlaps the perithecium. Perithecium (main body), 60 x 18 its tubular apex, 18-25 x 

 6 fi. Spores, 20 x 3 fi. Length of receptacle, 110 \x. 

 On Zaccophilus maculosus Germ., Connecticut. 



A singular species appearing at first sight malformed or abnormal. It occurs in company 

 with O. appendiculatus on the anterior legs of its host, and is at once recognized by the tubular 

 prolongation of the apex of its perithecium. 



Chitonomyces spinigerus Thaxter. Plate VIII, figs. 15-16. 



Heimatomyces spinigerus : Proc. Am. Acad. Arts and Sci. Vol. XXX, p. 478. 



Brownish yellow. Perithecium small, its tip slightly exceeding that of the receptacle ; its 

 extremity blunt, lobed, curved outward, and bearing two projections unequal in size just below 

 the tip, one of which extends outward beyond the perithecial margin as a blunt prominence. 

 Basal cell of the receptacle often bent, expanding distally, much longer than the flattened sub- 

 basal cell : the distal portion of the receptacle with greatly thickened external walls, and 

 consisting of the usual four cells, the terminal one short, with a broad base and bent towards the 

 apex of the perithecium. Three small cells are distinct below the perithecial cavity, from the 

 outer of which is produced externally a prominent spur-like process. Perithecia, 55 x 15 p. 

 Total length to tip of perithecium, 88-90 fi. Spur-like process, 12-30 /x long. 



On Laccopkilus maculosus Germ., Connecticut. 



Distinguished from all other species by the spur-like process from the base of the peri- 

 thecium. The septa are all defined with unusual clearness, the external walls being greatly 

 thickened. Apparently among the rarest of the twelve species inhabiting this host. 



Chitonomyces uncigerus Thaxter. Plate XXVI, figs. 27-28. 



Heimatomyces uncigerus : Proc. Am. Acad Arts and Sci. Vol. XXX, p. 478. 



Pale yellowish. Perithecium moderate, rather broad, its outer edge straight, its upper fourth 

 free from the receptacle, its prominent bluntly-tipped extremity bent abruptly outward at right 

 angles : a slender hooked appendage arises from a point close to the receptacle about two-thirds 

 of the distance from the base to the apex of the perithecium, projecting from it obliquely out- 

 ward. Basal cell of the receptacle large and long, the sub-basal cell small, sub-rectangular, 

 flattened : the distal portion composed of the usual four cells, the terminal one not very promi- 

 nent, and bent strongly toward the perithecium. Perithecia, 80 x 22-25 fi. Spores, 45 x 4 /x. 

 Perithecial appendage about 22 p long. Receptacle, 132 /x long. Total length to tip of 

 perithecium, 135 it. 



