OTIDEA. 441 



approximate, then expanding and becoming sometimes 

 almost plane, rigid when dry, 4-7 X 3-5 cm. ; disc deep 

 tawny-ochraceous or bay -brown ; externally whitish, with a 

 tinge of yellow or ochraceous; excipulum composed of 

 hyaline, sparsely septate, and densely interwoven hyphae 

 (4-6 fx thick), which run out to the circumference as 

 parallel, closely packed, septate, obtuse, sub-clavate hyphae, 

 10-14 fx diameter ; asci cylindrical, narrowed at the base 

 into a nexuous pedicel ; 8-spored ; spores obliquely 1 -seriate, 

 smooth, hyaline, continuous, usually 1-guttulate, elliptical, 

 ends obtuse, 18-24 X 12-14 fx; paraph} ses straight, septate, 

 apex clavate, brownish, 6-8 /jl diameter. 



Otidea auricula, Rehm, Hedwigia, 1883, n. 3, p. 34 ; Sacc, 

 Syll., n. 351. (non Cooke.) 



Peziza (Otidea} auricula, Bresadola, Fungi Tridentini, 

 p. 67, t. lxxiii. (Cooke.) 



Specimens examined in Rehm. Ascom., nos. 652 and 652 b ; 

 Eabh., Fung. Eur., n. 512. 



On the ground. 



On account of the peculiar structure of the excipulum, 

 and the somewhat cartilaginous consistency of the species 

 here called Otidea neglecta, Boudier has made this species 

 the type of a new genus, Wynnella, but for the following 

 reasons I do not think it advisable to adopt this idea. In 

 the British species of Otidea, Pers., the leading feature of 

 which is the oblique, more or less hare's-ear shaped asco- 

 phore, we find that the following species have the excipulum 

 composed of densely interwoven, hyaline hyphae which 

 become abruptly converted, close to the outside, into a more 

 or less coloured cortex, consisting of somewhat parallel, 

 septate hyphae. which sometimes adhere laterally, and form 

 an approach to a parenchymatous tissue ; the external cells 

 are arranged in irregular groups, thus producing the scurfy 

 or pulverulent outer surface ; Otidea neglecta, 0. leporina, 

 0. apophysata, 0. phlebophora, 0. pleurota. A second type of 

 structure is illustrated by 0. auricula and 0. micropus, and 

 consists of the excipulum being entirely parenchymatous, 

 the cells very large and irregularly polygonal ; cortex as in 

 the previous type. Finally, 0. onotica exhibits a type of 

 structure exactly intermediate between the two previously 

 described ; the hypothecium and the broad cortical layer 



