No. 1, July, 1920] MOBPHOiLOGY AND TAXONOMY 169 



new genus Peniophorina vehioh differs from Peniophora and w iesnerina in having a shield- 

 or cushion-shaped fruit body. A Bpeoies <>f Claudopus found to I"- parasitic on TomenleUa 

 sp. is named C. tomentellicola v. Hohnel. Its possible identity with Leptonia parasitica 

 Qu61ct and ('. Bubdepluens Fitzpatrick is recognized. Hypholoma laerymabtmdwn Fr. and 

 Stropharia caput Medusae Fr. are shown not to be iili-nt ic.-i l as claimed by Sicken. The 

 need of a new Beparal ion of the genera of the Bysteriaceae based on the relation of the fruit 

 body to the host tissue is pointed out. To emphasize this point the fruil body in Hypoder- 

 mella Laricis v. Tubeuf is shown to be ini raepidermal \\ hile I hat in Glonii lla p< r< xigua Bpeg.) 

 Sacc. is subcuticular. An hitherto undescribed imperfect stage of the latter species is given 

 as Leptotkyrina perexiguav. II. n. sp. The perfect stage of Lepiothyrium l/unariat Kze. is 

 transferred from Microthyrium to Gloniella and cited as Cloniclla Litnnriae (Fckl.) v. II. n. 

 comb. The genus Ascospora Fries is discarded because the type and other species are more 

 properly placed elsewhere, and A. microscopica Niessl is transferred to Gloniella, being called 

 G. microscopica (Niessl) v. H. The imperfect stage of this species is made the basis of a 

 new genus, Rhabdothyrella, of the Leptostromataceae. This genus is closely related to, or per- 

 haps identical with, Cystothyrium Speg. Leptostrorna virgultorum Sacc, having been found 

 closely associated on canes of Rubus with Hypoderma Rubi (P.), is regarded as its conidi;vl 

 stage. The fungus is transferred to Hypodermina v. H., and is called 1 1 y pndermina virgul- 

 torum (Sacc.) v. H. The statement is made that a new separation of the genera of the Hypo- 

 dermineae and Phacidiaceae based on the relation of the fruit body to the host is necessary. 

 This has already been supplied for the closely related group, the Dothideales. Since the fruit 

 bodies of Hypodcrma scirpinum DC. are subcuticular this species should be transferred to 

 Gloniella Sacc. emend Rehm. A sharp and satisfactory separation could be accomplished by 

 placing in Hypoderma the intraepidermal and in Gloniella the subcuticular species. When 

 the genus Entopeltis v. H. was erected in 1910, doubt was expressed concerning its systematic 

 position. It is now stated to be unquestionably a member of the Hypoderminae. The genus 

 Vizella Saccardo is also placed here. In both genera the fruit bodies are subcuticular. 

 Phacidium Piceae Fckl., placed by Rehm in Coccomyces, is here shown from an examination 

 of the type material to be merely the form of Lophodermium pinastri (Schrad.) which occurs 

 on the needles of the silver fir. Rostrup applied the name, L. abictis R., to this form stating 

 that it differs in having shorter asci and spores. If this species is accepted the name, L. 

 Piceae (Fckl.) v. H., must be used. The genus Pseudophacidium was founded byKarsten but 

 was incorrectly characterized. The four species included by Karsten are here shown not to 

 be of the same generic type. The type species Ps. Ledi (A. & S.) Karsten is retained in the 

 genus and the generic characterization is emended. Pseudophacidium degenerans Karsten 

 and Ps. Rhododendri Rehm are made the basis of a new genus, Myxophacidium, the first 

 named being cited as the type. Four other species, Ps. microspermum (Fckl.) Rehm., Ps. 

 Rehmii (Feltgen) v. H., Ps. Betulae Rehm, and Ps. Callunae Karsten, are made the basis of 

 another new genus, Myxophacidiella, the first named species being cited as the type. The 

 second new genus differs from the first in lacking paraphyses and in possessing long-stalked 

 asci. Both genera are placed in the Phacidiaceae. Pseudophacidium rugosum (Fries) Rehm 

 is shown to be more properly called Phacidium rugosum Fries. Pseudophacidium alroviola- 

 ceum v. H. is shown to be the same as Phacidiella discolor (Mout. et Sacc.) Potebnia, and to 

 fall more properly in the latter genus. The genus Phacidiella, placed by Potebnia in the 

 Pseudophacidiaceae is found to belong rather to the Stictidiaceae, and the generic characteri- 

 zation is emended from this standpoint. The imperfect stage of Phacidiella discolor (Mout. 

 et Sacc.) Potebnia, called by Potebnia Phacidiopycnis Malorum P., is shown to be the same 

 as Cytispora Pyri Fckl., and, since Phacidiopycnis Potebnia is known to he the same as Dis- 

 cula Sacc, the binomial Discula Pyri (Fckl.) v. H. is given. A comparative study is made 

 of the five species included by Rehm in Stegia Fries. Sections show that the position of the 

 fruit bodies in the host is different in the different species. Chiefly on this basis several new- 

 genera are erected. Stegia Lauri (Cald.) Sacc. is made the type of a new genus, Stegopeziza 

 a member of the Dermateaceae in which the ascomata are formed below the epidermis. 

 Stegia alpina (Fckl.) Rehm is made the type of a new genus, Sarcotrochila, closely related to 

 Trochila, and the ascomata are found to be intraepidermal. Stegia subvclata Rehm is made 



