428 PROCEEDINGS OF THE AMERICAN ACADEMY. 



median cell, though not produced from it, the remaining cells bearing 

 typical appendages, often as long or longer than the peritheciura, the small 

 subtending cell being unusually well defined. Subject to great variation, 

 and sometimes producing more than one antheridiuin. Peritheciu 80-96 

 X 32 i^. Receptacle 270 X 80-100 to 120 X 45 fx. Total length to tip 

 of perithecium 200-350 fx. 



On Bledius bicornis Germ., British Museum, No. 392, Europe (Thu- 

 ringia), No. 432, Europe; on Oxyfelus rugosus Fabr., British Museum, 

 450, Hampstead, England; on Acrognatlius mandibidaris Gyll, Brit- 

 ish Museum, No. 434, Europe. On legs, elytra, and prothorax. In small 

 specimens the two lower tiers may be but slightly developed, bearing 

 neither appendages nor perithecia, the middle producing one antheridium, 

 the number of cells and appendages on one side of the perithecium being 

 as in all cases greater than on the other, 



LIMNAIOMYCES nov. genus. 



Receptacle consisting of two ^lortions, a basal part below the perithe- 

 cium and a distal part united to its posterior margin ; the basal portion 

 consisting of a single basal cell, surmounted by two tiers of cells (some- 

 what as in Peyritschiella), the anterior cell of the upper tier giving rise 

 to a compound antheridium in structure similar to that of Peyritschiella : 

 the distal (marginal) portion consisting of an inner and an outer elon- 

 gated cell, the inner terminating in one of the bell-shaped appendiculate 

 cells characteristic of Chitonomyces, separated from the simple appendage 

 by a broad, constricted, blackened septum ; the outer by successive sub- 

 terminal external proliferations forming a series of cells from which a 

 smaller secondaiy appendiculate cell is separated above, the whole cor- 

 responding in development to the external portions of the tiers of cells 

 in Dichomyces, the proliferation taking place to the right and left succes- 

 sively, so that the appendages appear to arise in two rows. 



A clearly defined genus apparently intermediate between Peyritschiella 

 and Chitonomyces. 



Limnaiomyces Tropisterni nov. sp. 



Perithecium amber brown, straight, erect, with a slight nearly median 

 inflation or tapering but very slightly to the undifferentiated tip; the 

 upper half free. Receptacle pale straw colored, distally dull amber 

 brownish, the foot minute, black ; the basal cell short and small, the 

 lower tier consisting of two cells which are nearly equal, several times 



