1906] OVERTON—THECOTHEUS PELLETIERI 465 
calyx (DANGEARD ’94), Peziza Stevensoniana, Ascobolus furfuraceus 
(HARPER ’95), Lachnea scutellata, Pyronema confluens (HARPER :00), 
Aleuria cerea (GUILLIERMOND :03, :04), A. amplissima, and A. 
olivea (GUILLIERMOND :04), Peziza catinus, P. venosa, P. rutilans 
(GUILLIERMOND :04), Ascobolus marginatus, Otidea onotica (GumL- 
LIERMOND :03, :04), Acetabula vulgaris, Pyronema confluens, Ciboria 
echinophila, Bulgaria inquinans, Guilliermondia saccabaloides (Gut- 
LIERMOND :04), Peziza sp. (FAULL :05), Ryparobius sp. (BARKER 
03, :04), Neotiella albocincta, Acetabula sp., Pseudoplectania sp., 
(FAULL :05), Boudiera Clausseni (CLAUSSEN :05), Peziza vesicu- 
losa (MaIRE :05), Thelebolus stercoreus (RAMLOW :06), Humaria 
granulata (BLACKMAN and FRASER :06), Thecotheus FPelletieri 
(OVERTON :06). Several variations from the type described above 
also occur among the Discomycetes. Galactinia succosa (MAIRE 
03, :05, GUILLIERMOND: 03, :05), Acetabula leucomelas (GUILLIER- 
MOND :03, :04, :05), Acetabula vulgaris (MATIRE :03) have their 
asci arising from binucleate terminal cells. GUILLIERMOND (:03) also 
found that Pustularia vesiculosa occasionally has its asci arising in 
alike manner. Peziza catinus and P. vesiculosa (GUILLIERMOND 
:05) occasionally have the asci arising from the subterminal cells 
of the ascogenous hyphae whose tips are recurved. Acetabula 
acetabulum (GUILLIERMOND :03) has binucleate cells formed in the 
curved tips of the ascogenous hyphae which do not form the asci, but 
give birth to a series of two, three, and four cells, of which the 
terminal ones produce the asci. In Discina venosa (FAULL :05) the 
ascus arises from a curved terminal cell. In Urnula cratertum 
(FAULL :05) the ascus may spring apparently from any cell what- 
ever. In Humaria granulata (BLACKMAN and FRASER :06) the ascus 
occasionally arises from the terminal cell. 
A number of the Helvellaceae have been studied, which also show 
great variation in the mode of ascus formation. Helvella ephippium 
(DaNcEaRD ’ 94), Morchella esculenta (DANGEARD ’94), Helvella sul- 
cata, H. elastica, H. crispa (GUILLIERMOND :04), Morchella escu- 
lenta, M. conica, Helvella astra, H. lacunosa, H. elastica (FAULL 
‘05) have their asci formed from the penultimate cells of the 
Tecurved tips of the ascogenous hyphae, in the manner described by 
DaNGEarD for Morchella. In Geoglossum ophioglossoides, G. hir- 
