OTIDEA. 443 



etwas zu hellbraun "). Rehm evidently considers that his 

 fungus is the same as Cooke's, but that the latter differs in 

 being the same colour all over. A few linos further on 

 Rehm, in giving the synonymy of his supposed Otidea 

 auricula, says, " Minime, Cooke, F. Brit., i. 473 ( Jod 

 intensive f )," hence we see that Rehm accepts Cooke's figure 

 of Otidea auricula, but rejects the specimens from which the 

 figure was drawn. If either Bresadola or Rehm had made a 

 comparative examination of the tissue of Cooke's fungus 

 with their own they would have found out at once that they 

 were dealing with two distinct species. Finally, Otidea 

 auricula, as understood by Cooke and described above, is 

 characterised by being everywhere yellowish-brown; ex- 

 cipulum parenchymatous, cells very large ; paraphyses 

 clavate, straight, equal in length to the asci. Among near 

 allies 0. onotica differs in the smaller spores, 0. leporina in 

 the paraphyses being curved at the tips ; and the somewhat 

 distantly allied fungus, confused by Bresadola and Rehm 

 with the true 0. auricula — which may be called Otidea 

 neglecta — is sharply distinguished by the bay-brown disc, 

 and the excipulum consisting of densely interwoven septate 

 hyphae that become arranged in a parallel series towards 

 the outside. 



Otidea pleurota. Phil., Brit. Disc, p. 51, pi. 3, fig. 13 ; 

 Sacc, Syll., viii. n. 363. 



Sessile, but attached by a narrowed base, slightly elongate 

 on side, divided nearly to the base on the shorter sides, 

 2—3 cm. across, rather fleshy, excipulum composed of intri- 

 cately interwoven hyphae, 6-8 \x thick, running out into a 

 superficial layer of irregularly globose cells, 18-24 /x dia- 

 meter, hypothecium cavernous ; disc umber-brown, externally 

 smooth and paler in colour; asci elongated, narrowly-cylin- 

 drical, 8-spored ; spores obliquely 1 -seriate, hyaline, con- 

 tinuous, densely and minutely warted, usually 1-guttulate, 

 15 X 8-9 //,; paraphyses stout, becoming gradually clavate 

 upwards ; apex 5—7 fx, thick, brown, septate. 



Peziza pleurota, Cke., Micogr., fig. 351. 



Authentic specimens from Phillips examined. 



On cow-dung. 



Readily recognised if attention be paid to the exceptional 



