THAXTER. LABOULBEKIACE^. 481 



species. The type of C. mirabilis, which is the most common species, 

 is characterized by a stouter perithecium, the inner margin of which 

 is strongly curved, the curve being broken by a rounded prominence 

 on either side just below the apex, which is bent strongly to the base 

 of the perithecial appendage. The perithecial appendage is evenly 

 and distinctly inflated towards its base, and reaches a considerable 

 length. The main axis of the antheridial appendage is short and 

 stout, consisting of about a dozen superposed cells. From this type 

 may be separated a second species, which may be designated as 

 follows : — 



Ceratomyces confusus, nov. sp. 



General habit and color as in C. mirahilis. Perithecium hardly 

 inflated, its inner margin curving evenly to the prominent blunt apex 

 which stands out free from the base of the perithecial ajjpendage. 

 The perithecial appendage shorter than in C. mirahilis, without the 

 bulbous inflation at its base. Axis of antheridial appendage long and 

 slender, distally attenuated, with comparatively few short branches. 

 Receptacle as in 0. mirabilis. Spores 75 X 3.7 fx. Perithecia 235- 

 835 X 65 yu,. Axis of antheridial appendage 235 yu. (longest). Recep- 

 tacle 165 X 75 //,. 



On Tropisternus glaher Hb. and T. nimhatus Say. New England. 



This species is much rarer than O. mirahilis, and is at once distin- 

 guished by the absence of any prominences below the apex of the 

 perithecium, as well as by the differences presented by its perithecial 

 and antheridial appendages. Otherwise the two species are easily 

 confused. 



VOL. XXX. (n. s. xxii.) 31 



