408 PROCEEDINGS OF THE AMERICAN ACADEMY. 



the lateral and like them bluntly rounded. Receptacle consisting of two 

 Bmall cells, tin- lower twice as large as the upper, which gives rise distally 

 to the Btalk-cell and bears the free appendage laterally; the foot an 

 unmodified cell which penetrates the host, dividing below into a very 

 copiously branched system of Blender, sinuous, rhizoidal hyphae. Ap- 

 pendage consisting of a dumbbell-shaped, free Btalk-cell, the basal half- 

 rounded or Battened, brownish, somewhat larger than the distal portion, 

 which is deeper brown, flattened and inflated, connected by a narrow 

 hyaline isthmus (the lumen of which may become almost obliterated) with 

 the lower half, and mostly broader than the hase of the basal cell of the 

 appendage, which is infertile, Bubrectangular, or somewhat inflated, slightly 

 longer than broad, the lower half of the walls becoming conspicuously 

 modified bj a prog • thickening from above downward, the thick- 



1 portion deeper brown; the remaining cells of the appendage three 

 to four in number, brownish, successively smaller from below upward, 

 giving the organ a characteristically tapering habit; the two lowest of 

 these cells usually relatively Bhorter, and hearing each three to four 

 antheridia Bide bj side, distally and externally; those above relatively 

 longer and naiTOW< r and producing fewer antheridia. the terminal one 

 Bpiniferous. Antheridia with sh-nder curved necks. Spores 60-65 x 



,. Perithecium: venter 325-350 x 70-90 /*; the Btalk-cell 220- 

 250 • 75-80/t. Appendage, 100-1 10 /x, the stalk-cell 35-40 X 30-35/* 



(the Upper half X 28-30 /' I. Receptacle o."j-7o X 45-50 /A. 



On the abdomen of Qyclopodia macrant Speiser. New Pomerania. 

 Berlin Museum, No. 85 1. 



The original name given to this genus in l.s."»7 by Kolenati is here 



iued in preference to the much later one applied to it by Peyritsch 



in I - nee however absurd and scientifically worthless the original 



zoological descriptions of these forms may be, there has never been the 



slightest question as to the generic identity of the organisms studied by 



■ two authors. Neither the descriptions nor the figures given by 



Kolenati and Diesing are, however. Bufficient to render a specific deter- 

 mination possible, so that the name given by Peyritsch to the European 

 <.| tin- '." nib. although it is undoubtedly a synonym of A. Die- 

 ;<i Kol. or A. Wutrwnbii K"|.. or more prohahlv of both, may 



properly be retained. The new forms here described are very closely 

 allied, differing chiefly in the details of structure in the appendage and 



the tip of the perithecium. lint are very different from Arthrnrln/itrlnis 



M •■ rial in my possession obtained from specie- of .Xi/c- 



teribia, from Europe, must, I think, he referred without question to the 



