188 ATLAS DER DIATOMACEEN KUNDE. 



specific names first, the habitats are previously given. In the des- 

 cription of figs. 3 &c., pi. xi., the arrangement stands thus : — 

 " 3, Pelew 3. (Grundl. 5, 6. Puerto Cabello, 7, 10. Camp. Bai 

 (ob. auch. 11, Yokohama?). N. separabilis, A. S. steht in der 

 Mitte zwischen, N. Pandura u N. mnlticostata sich niiher an die 

 erstere anschliessend, Grunow zieht sic als var intermedia zu seiner 

 N. multicostata." The specific names not being printed in italics 

 renders it somewhat difiicult to detect them. 



F. KiTTON, Norwich. 



NOTE ON PEZIZA FUSCESCENS, PEES. 

 By W. Phillips. 



In consequence of a suggestion thrown out by the eminent 

 authors (Messrs. Berkeley and Broome) of the " Notices of British 

 Fungi" in the Ann. and Mag. of Natural History, January, 

 1875, page 38, that probably Peziza brunneola, Desm., is the same 

 plant as that described by Persoon under the name of P, fuscescens, 

 I am induced to offer a few remarks which may help to a settle- 

 ment of the question. The very fragile nature of both these 

 minute plants renders it very difiicult to find them in published 

 exsiccati and exchange specimens, but I have been fortunate enough 

 to find both in this country, P. brunneola, Desm., in North Wales, 

 and P. fuscescens, P. in South Wales, so that I have had ample 

 opportunity of comparing fresh specimens. 



Persoon first described his P. fuscescens in the " Synopsis 

 Methodica Fungorum," p. 654, in 1801, but with a very brief and 

 imperfect diagnosis. Four years later Albertini and Schweinitz 

 described it more fully in their " Conspectus Fungorum," p. 325. 

 Persoon in his " Mycologia Europaea," p. 265, published 21 years 

 after his synopsis, gave a more complete description as follows : — 

 " Becoming fuscous, epiphyllous, minute, stijjitate, totally brown, 

 pilose, at first globose, then hemispherical. Occurring rarely on 

 beech leaves (not seen by me in any quantity)." He then quotes 

 from the Conspectus (A. and S.) " Cupula when dry globose, closed ; 

 when moist semipatulate, and clothed, especially round the margin, 

 with dull-brown hairs (pilis badiis)." This description equally 

 well applies to either species in question, except that Persoon's 

 plant is found on beech leaves while Desmazieres' plant is found on 

 oak leaves. It now remains to inquire whether they differ in any 

 other respect than in the matrix on which they grow. That such 

 a careful observer as Desmazieres, accustomed to the use of the 

 microscope, should have established a species on insufficient 



f rounds is very improbable, and that he was not unacquainted with 

 'ersoon's plant is evident from his remark in speaking of his own 



