MONOGRAPH OF TTTE LABOULBENIACF^E. 



275 



the sub-basal cell of the receptacle. Whether the antheridium as a whole is truly terminal, and 

 developed from the smaller of the two primary spore segments, is uncertain. When mature, it 

 is a somewhat complicated organ ; but in a general way corresponds to that of Dimorphomyces, 

 except in the number and arrangement of its anthcridial cells. The latter appear to be placed in 

 probably two, possibly three, vertical rows, each cell extending obliquely inward and upward 

 towards a general lateral and partly eentral cavity into which they discharge, and which is usu- 

 ally well filled with irregularly squarish or roundish antherozoids. I have been unable to make 

 out to my own satisfaction whether all the smaller cells of the antheridium are spermatic, and 

 what their exact disposition is. The figures given (5 and 6) represent only in a general way the 

 relations of the cells to the cavity for the' reception of antherozoids ; the view in the one case 

 being sectional in a plane which docs not show the openings through which the antheridial cells 

 discharge their contents ; in the other (fig. 6), showing the appearances visible on the anterior 

 (inner) surface of the organ. The antherozoids are produced in very large numbers, and no 

 form that I have seen is so well adapted to illustrate their discharge, which almost invariably 

 occurs when the specimen is placed in water. This is perhaps connected with the fact that the 

 trichogyne is very rudimentary, consisting of a small vesicular prominence, with one or two 

 short projections, and is not in close proximity to the antheridium, so that the production of a 

 large number of male bodies is necessary to insure fertilization. The carpogenic cell is very 

 large, and the trichophoric cell bears the trichogyne laterally and anteriorly, the latter subtended 

 by a peculiar and well-marked prominence. This prominence, at the left in fig. 4, constitutes 

 the basal portion of the trichogyne, the receptive portion of which is seen in the angle between 

 it and the projecting apex of the trichophoric cell. The latter is separated from the base 

 of the trichogyne by a septum which was accidentally omitted from the figure. The cavity of 

 this basal portion, which becomes indurated and persists as a slight projection on the mature 

 perithecium (fig. 2), is not, as represented, continuous with that of the trichophoric cell. The 

 ascogenic cells are two in number, and the asci do not seem strictly biseriate. 



Camptomyces melanopus Thaxter. Plate VI, figs. 1-6. 



Proc. Am. Acad. Arts aud Sci. Vol. XXIX, p. 101. 



Perithecium tinged with brownish, slightly inflated towards the base, its distal half narrow, 

 tapering gradually to the rounded attenuated apex, below which on one side is a rounded pro- 

 jection ; borne on a large sub-triangular stalk-cell, surmounted by three smaller basal cells. 

 Receptacle narrowly funnel-shaped, tapering to a pointed base, and consisting of a large basal 

 cell, slightly translucent near its lower extremity, but otherwise becoming wholly opaque, 

 followed by a flattened sub-basal cell, from which the mature perithecium with its stalk project 

 nearly at right angles to the long axis of the receptacle, while distally it bears the appendage. 

 Appendage consisting of a single squarish cell, followed by a flattened cell which bears terminally 

 the sub-conical, slightly asymmetrical antheridium. Spores about 30 X 3.5 fi. Perithecium, 

 130-150 x 30-33 p. Total length to tip of antheridium, 110-125 /x. Greatest width, 25 /x. 

 Antheridium, 25 x 16 ft. 



On Sunius prolixus Er., Waverly, Mass., and York, Maine. On 8. longiusculus Mann., 

 Kittery Point, Maine. 



