274 



MONOGRAPH OF THE LABOULBENIAOEiE. 



the figure (Plate YII, fig. 27) merely represent the bases of such antheridial cells ; the terminal 

 portions extending upward and inward, and discharging into the common cavity. This matter 

 cannot, however, be determined without an examination of fresh material of immature 

 specimens. 



Eucantharomyces Atrani Thaxter. Plate V, figs. 25-27. 



Proc. Am. Acad. Arts aud Sci. Vol. XXX, p. 480. 



Pale straw-colored. Perithecium rather long, slightly inflated, tapering to a blunt apex with 

 rounded lips, its stalk consisting of a single large free basal cell surmounted by three smaller 

 cells. Basal and sub-basal cells of the receptacle long and very obliquely superposed, lying 

 almost side by side. The appendage consisting of a basal cell not wholly free, but partially con- 

 nected with the stalk-cell of the perithecium at its base, followed by a second sub-triangular cell, 

 the oblique upper walls of which separate it on the inside from the body of the antheridium 

 proper, and on the outside from the narrow cell which forms the sterile margin of the latter. 

 Antheridium sub-cylindrical with rounded apex, consisting of three series of obliquely super- 

 posed cells, decreasing in size from below upward, and running obliquely upward and outward, 

 the lower series of six cells, the middle of four, and the upper of two ; the three series 

 terminating in a common cavity filled with antherozoids, which are discharged through a terminal 

 irregular, finger-like projection, which is bent strongly outward. Perithecium, 135 x 35 fi. 

 Length to tip of perithecium, 260 /j.. To tip of antheridium, 150 fi. 



On Atranus pubescens Dej., Virginia. 



Two specimens of this form were found in company with Rhacliomyces lasiophorus, on an 

 example of Atranus kindly sent me by Mr. Pergande, and, although carefully sought for on all 

 the available material of its rather rare host, has not been again observed. Neither of the speci- 

 mens, which are both figured in the plate, are fully mature, and there is doubtless some slight 

 further development of the perithecium. It is unlikely, however, that any difficulty will be 

 encountered in its subsequent identification. 



CAMPTOMYCES Thaxter. Plate VI, figs. 1-G. 



Proc. Am. Acad. Arts and Sci. Vol. XXIX, p. 100. 



Receptacle consisting of two superposed cells, the upper bearing the short-stalked perithe- 

 cium laterally and the antheridial appendage terminally. Perithecium narrow, with coarse- 

 lipped asymmetrical apex. Appendage consisting of a single large basal cell bearing the 

 antheridium terminally. Antheridium multicellular, sub-conical, with a prominent terminal 

 pore for the discharge of the numerous roundish antherozoids. Trichogyne developed as a small 

 vesicular prominence from a permanent ear-like appendage which arises laterally from the 

 young perithecium. Ascogenic cells two in number. Spores once septate. 



It is much to be regretted that in this genus, as in all the genera closely allied to it in which 

 the antheridium appears to be a terminal organ, no material is available which illustrates the 

 first steps in its production. In the youngest conditions examined, the antheridium has, in all 

 instances, attained nearly complete development, even when the perithecium is a mere bud from 



