158 PROCEEDINGS OF THE AMERICAN ACADEMY 



the apex. From the basal cell which becomes broad, lobulated, and 

 indistinctly vertically septate, arise directly one to four perithecia and 

 one to four sterile usually simple appendages, the latter tapering 

 slightly, distinctly septate, hardly exceeding the mature perithecia in 

 length. Perithecia slender, the base prolonged into a short slender 

 stalk separated from the basal cell of the receptacle by a septum be- 

 tween which and the ascogenic cell no septa are visible : the apex 

 broad, apiculate, sharply bent towards a tooth-like projection which 

 arises just below it. Spores 33 X 3.5 /*. Perithecia 65-70 x 15/*. 

 Appendages about 110 /n. Receptacle about 40 fi long. 

 On abdomen of Falagrla dissecta Er., Massachusetts. 



AMORPHOMYCES, nov. gen. 



Sexual organs borne on separate individuals. 



Male individual. Receptacle consisting of two superposed cells 

 bearing terminally a single one-celled long necked antheridium. 



Female individual. Receptacle consisting of a few superposed cells, 

 without true appendages, bearing terminally a single large perithe- 

 cium. Asci arising from a lateral placenta-like ascogenic area. 



The single antheridium seems constant in the species in which the 

 male individual is known, but it is not improbable that further knowl- 

 edge of the genus may necessitate a modification of the above diag- 

 nosis in this respect, since, as shown by other genera, the number of 

 antheridia present is usually variable. 



A third form, apparently referable to this genus, was observed on a 

 species of Lathrobium, and is marked by a greater development of the 

 lateral prominence from the receptacle present in A. floridanus. 



Amorphomyces Falagri^:, nov. sp. 



Male individual consisting of three superposed cells, the basal and 

 sub-basal about equal, the latter suffused with dark brown ; the distal 

 cell an antheridium basally slightly inflated, distally prolonged into 

 a cylindrical neck bent to one side. Total length 48 ti by 10 p broad. 



Female individual. Receptacle hyaline, consisting of a small basal 

 cell, sometimes partly divided, surmounted by a few (three or four) 

 small cells more or less irregular in shape, number, and position, from 

 which arises the large pale brownish yellow perithecium, which is 

 curved strongly on the side opposite the ascigerous area, and tapers 

 to a blunt almost truncate tip furnished with rather prominent lips. 

 Spores subcylindrical, about 37 X G p. Perithecia 100 X 30-33 m. 

 Total length 130-138 M . 



On abdomen of Fafngria dissecta Er.. Massachusetts. 



