372 PROCEEDINGS OF THE AMERICAN ACADEMY. 



bearing an antheridium and appendages in a similar fashion so that 

 the individual is bilaterally subsymmetrical : the middle series con- 

 sisting of but two flattened cglls, the upper, its broader extremity 

 free beyond the distal cell of the posterior series, nearly twice as long 

 as the lower, which is opaque below and forms with the two lower 

 cells of the two other series a suffused area in which cell-divisions 

 are not visible and which extends upward so as to involve the lower 

 half of the perithecium; the tip of which is nearly free, usually bent 

 slightly toward the anterior series, and subtended anteriorly by a 

 straight appendage about 15 X 3 ix, suffused towards the base, and 

 apparently the indurated base of the trichogyne. Appendages 

 nearly symmetrical on either side, long and slender, hyaline, becoming 

 deeply suffused at and towards the base, cylindrical, tapering slightly 

 at base and apex. Antheridia normally solitary, borne distally from 

 the subbasal cells of the two marginal series, hyaline, the necks pur- 

 plish, curved outward. Spores, in perithecium about 22 X 3.5 jx. 

 Perithecia 35-40 X 15 m- Basal cell 18-50 X 6-15 /x. Appendages 

 35-60 X 4-6 n. Total length exclusive of stalk 48-56 X 35-38 tx. 



On the inferior surface and legs of Macrocheles sp. and Celaenopsis 

 sp. Kamerun, Nos. 2438, 2439. 



A very beautiful species, quite unlike any other known form. The 

 specimens on Celaenopsis are somewhat smaller. 



Rickia obcordata nov. sp. 



Hyaline. Basal cell bent, its pointed upper half filling the sinus 

 of the slightly asymmetrical obcordate body. The marginal series 

 consisting of typically six cells each and subsymmetrical with one 

 another, the posterior shorter, terminated by the slender basal cell 

 of the primary appendage which, like all the appendages and the 

 antheridia, projects radially in a more or less regular fashion: basal 

 cells of the marginal series radially extended, broad and rounded 

 externally, separating a small triangular cell above, which subtends 

 an appendage symmetrically placed on either side of the body, the 

 second and third cells of both series separating externally three to 

 four small cells which subtend each an antheridium, the necks quite 

 hyaline projecting more or less radially, usually straight, the third 

 cell on the posterior side usually bearing an appendage distally: the 

 fourth and fifth an antheridium and an appendage, or an appendage 

 only in both series, except in cases where there are but five cells in 

 the posterior series, the uppermost of which always subtends the 



