CHITONOMYCES AND RICKIA. 25 



externally; the third small and subtriangular, extending inward l)elow 

 the base of the ascigerous cavity; the fourth flattened beside the outer 

 margin of the perithecium, extending upward perhaps one third of its 

 length, and so narrow as to be hardly recognizable: median series 

 consisting of seven obliquely superposed cells; the two lower smaller, 

 the lowest somewhat above the base of the perithecium, the upper 

 four externally free, the uppermost bearing a terminal appendage 

 directly; the two lower cutting off appendiculate cells, while the 

 subterminal is without any appendage: posterior series consisting of 

 three or four cells, each cutting off an appendiculate cell distally and 

 externally, the upper larger, the uppermost also bearing the large base 

 of the primary appendage which diverges slightly from it laterally and 

 distally. Perithecia relatively large, somewhat curved inward 

 throughout; the tip rather short and moderately distinguished; the 

 apex broad, blunt, bent slightly sidewise. Spores about 16 X 2 n. 

 Perithecia 28 X 9 m- Total length to tip of perithecium 40 X IS fx. 

 Base of primary appendage 10 X 3.5 ju. 



On Cclaenopsis sp.. No. 2697, St. Anns Valley, Port of Spain, 

 Trinidad. 



This minute form was found in company with R. cxcavata. It is 

 distinguished from depauperate forms of R. Euzerconalis by the blunt 

 apex of its perithecium, which lacks the finger-like projection so 

 characteristic of this and numerous other species. Two mature 

 specimens, only, have been examined, in which no antheridia were 

 recognized. 



Rickia radiata nov. sp. 



Hyaline, triseriate. General form short and compact with more or 

 less even outline, basal cell forming a well developed abruptly differ- 

 entiated stalk, the apex of which is intruded between, and nearly sepa- 

 rates, the paired triangular basal cells of the anterior and posterior 

 series, one or both of which may cut off marginal appendiculate cells 

 distally and externally; one or both of the basal cells themselves grow 

 downward to form an elongated, attenuated, hyaline, buft'er-appendage 

 which may or may not be separated by a septum at the base. Re- 

 ceptacle triseriate, subdeterminate; the anterior series consisting of 

 five cells, the second and third broader; each cutting off distall\- and 

 externally one, sometimes two, superposed small cells which bear 

 prominently projecting subulate hyaline sessile antheridia, which are 

 not distinguished by any blackened septum; the fourth cutting oft' an 



