24 Aves. 
AYES. 
Lydekker, R. Catalogue of the Remains of Siwalik Vertebrata in the 
Geological Department of the Indian Museum, Calcutta. Calcutta : 
1886, 8vo. [Birds, pp. 1-4.] 
Macoun, J. M. List of Birds Collected at Lake Mistassini [Canada]. 
Rep. Geol. & N. H. Surv. Canada, pp. 35 & 36. 
Maopherson, H. A. The Birds of Skye, with special reference to the 
Parish of Duirinish. Part I, 1886. P. Phys. Soc. Edinb., 1885-86, 
pp. 118-143. [With notes by J. A. Harvie-Brown.] ; 
Out of 153 species, 3 are new to the Hebrides (Sylvia nisoria, Sitta 
ccesia , Puffinus major). Notes on breeding. 
. [See also Puffinus (Procellar idee), Fuligula (Anatidce). 
, & Duckworth, W. The Birds of Cumberland critically studied, 
including some Notes on the Birds of Westmoreland. Carlisle : 
1886, 8vo, xx & 206 pp., map and col. front. 
81 migrants, 84 residents, and 85 rare visitants are included in the list. 
MadarAsz, J. v. [See Pipra dubia (Pipridce ) , Myiophoneus tlbetanus 
(Turdidce), Pucrasia meyeri ( Phasianidce ), n. spp., Tetraophasis 
( Tetraonidce ).] 
Magnien, L. Sur le ganglion genicule des Oiseaux. C.R. c, pp. 1507- 
1509. 
Mangeard, A. Catalogue raisonn6 des Oiseaux qui se reproduisent dans 
les environs d’Autun, observes depuis 1840 jusqu’en 1884. Mem. Soc. 
Saone, 1885, pp. 29-35. 
Manzella, A. [See Giglioli, E. II.] 
Marey, — . Etude sur les mouvements imprimis par l’aile d’un 
Oiseau; experiences de M. Muller. C.R. cii, pp. 1137-1139. 
Experiments on the motive power of Birds rising from rest, &c. 
Massa, C. Notizie intorno alia Fauna dei Yertebrati di Montegibbio. 
Atti Soc. Mod. Mem. 1884, pp. 89-100. [Birds, pp. 92-98.] 
Mattiii essen, L. Ueber den physikalisch-optischen Bau des Auges der 
Yogel. Arch. ges. Phys. 1886, pp. 104-112, pi. i. 
McAldowie, A. M. Observations on the Development and the Decay 
of the Pigment Layer on Birds’ Eggs. J. Anat. Phys. 1886, 
pp. 225-237. 
In an interesting paper the author remarks that only two colours (red 
and green) besides black are found on eggs. The amount of pigmenta- 
tion is in a direct ratio to the sun’s rays which fall on them, and its effect 
and primary cause is the protection of the interior of the egg, in which 
the germinal spot is always uppermost and most exposed. Green is the 
most effective colour for this purpose, red is the complement to green, 
and black intensifies both ; they are all derived by metamorphosis from 
the hoematin of the rod blood-corpuscles. Green was the first colour 
developed in the early days of bird life, red followed, chiefly for purposes 
cf concealment (this colour is at times produced by food). This conceal- 
ment is the secondary cause of pigmentation ; hence those birds whose 
