456 
36 920—36 933 Mercer—Merrill. 
20 Mercer W. A few insects and piant diseases of special interest to farmers 
(Ohio State Univers., Columbus, Bull. n. 3, 1901, p. 126—138). 
21 Mereshkowsky K. S. Zur Kenntnis der Flechten von Nord-Russland (Trud. 
Obschtschestw. estet. Imp. Kasanskom Univ. Kasan XXXVI—XXXVII, 
1904—1906, ersch. 1906, Beil. n. 234, p. 1 —15). 
21 a — Theorie der zwei Plasmaarten ais Grundlage der Symbiogenesis, einer 
neuen Lehre von der Entstehung der Organismen (Biol. Centrbl., XXX, 
1910, p. 278—303, 321—347, 353-367). 
22 Merino B. Monografia de las especies dei genero Romulea, que vegetan 
cerca de la desembocadura dei Mino (Pontevedra) (Act. Congr. espana, 
Zaragoza 1909, 15 pp.) 17 tab. (Paras. Pilze auf der Gattung). 
22a Merle. La Maladie du Coeur de la Betterave. Joigny (Hamelin), 1906 
(La sucrerie indigene et coloniale 1907, p. 125—129, 148—152). 
23 — Uber die Herzfaule der Zuckerriibe (La sucrerie indigene et coloniale, 
XLIV, 1908, p. 91; Osterr .-Ungar. Zeitschr. f. Zuckerindustrie u. Landwirt- 
schaft, XXXVII, 1908, p. 304). 
24 Merrill G. K. Report of the Lichen Department (Bryologist XI, 1908, 
p. 39). 
25 — Lichens notes No. 5. Remarks on nomenclature and three new names 
(Bryologist XI, 1908, p. 48—53). 
26 — Lichen notes No. 6. A list of the Parmelia species of British North 
America, contained in the herbarium of the Canadian Government at 
Ottawa, with descriptions of those species not mentioned in Tuckerman’s 
Synopsis, and of several new forms (Bryologist, XI, 1908, p. 84 — 95). 
27 — Lichen notes No. 7. Yukon lichens (Bryologist XI, 1908, p. 105—111). 
28 — Lichenes exsiccati. Fasc. I, No. 1—50, 1909; Fasc. II, No. 51—100, 1910. 
29 — Lichen notes No. 7. Cladonia multiformis (nom. nov.) (Bryologist, XII, 
1909, p. 1—5) tab. 
30 — Lichen notes No. 8. Alectoria tortuosa sp. nov. (The Bryologist XII, 
1909, p. 5—6). 
31 — Lichen notes No. 9. Parmelia latissima F6e and two commonly asso- 
ciated species (The Bryologist XII, 1909, p. 29—31). 
32 •— Lichen notes No. 10. Cladonia gracilis a verticillaba f. symphycarpia 
Tuck. and Cladonia symphycarpa Fr., a present view of their identity 
(Bryologist XII, 1909, p. 43—46) tab. 
33 — Lichen notes No. 11. Describing Parmelia endoxantha, a new species; 
P. olivacea multisporum, a new combination; and three little known 
Parmelia species hitherto inadaequately diagnosed (Bryologist XII, 1909, 
p. 71—74). 
