16 KEY TO THE ARRANGEMENT. 



paraphyses distinct, or now obsolete. Spores from 

 ellipsoid oblong, bi-quadri-plurilocular, or at length 

 muriform-multilocular, brown, or decolorate. Thal- 

 lus mostly obscure. 



71. PYKENASTRUM. Apothecia rather prominent, turbi- 



nate, several oftener confluent above into a common 

 mouth (ostiole) ; perithecium conical, oblique, black; 

 amphithecium blackening ; paraphyses distinct. 

 Spores ellipsoid and oblong, muriform-multilocular, 

 brown. Thallus obscure. 



72. STRIGULA. Apothecia prominent, depressed-globose ; 



perithecium black ; amphithecium pale, or blacken- 

 ing; paraphyses distinct. Spores oblong-ovoid, or 

 oblong, from simple bi-quadrilocular, without colour. 

 Thallus epiphyllous, passing finally into a lobulate 

 crust. 



