44 '^he Irish Naturalist. MarcVi, 



Sand-Martin, Ripavia riparia (Linn.) [Cotilc viparia]. — Average of 4 eggs 



I7-43XI2-82 — weight 078. 

 Cuckoo, Ciiculus canonis Linn. — Average of 4 eggs 22 03x16 -55 — 



weight -1728. 

 Swift, Micropus apiis (Linn.) [Cypsehis apiis]. — Average of 3 eggs 24-67 



X 16 '13 — weight 23. 

 Nightjar, Caprimulgits curopaeus Linn. — Average of 4 eggs 31 ^x 22 jj — 



weight -625. 

 Kingfisher, Alcedo ispida Linn. — Average of 3 eggs 2^.\x 18 73 — weight 



•2166. 

 Barn-Owl, Flammea flammea (Linn.) [Sirix flammea]. — Average of 2 eggs 



40 ■ 75 X 30 • 6 — weight i • 45 . 

 Long-eared Owl, Asio oils (Linn.). — Average of 2 eggs 41 -25 x 32 5 — 



weight 1-575. 

 Marsh-Harrier, Circus aeruginosus (Linn.). — One egg 49 5 x 39 3 — weiglit 



405- 

 Hen-Harrier, C. cyaneus (Linn.). — Average of 2 eggs 48 25x36 -25 — 



weight 3-05. 

 Buzzard, Biiteo buteo (Linn.) [jS. vulgaris]. — Average of 3 eggs 54-77X 



46 • 83— weight 4.6833. 

 Golden Eagle, Aquila chrysaetus (Linn.). — One egg 72 3x58 3 — weight 



132. 

 White-tailed Eagle, Halia'elus albicilla (Linn.).^ — One egg 70 7x55 7 — 



weight 1 1 • 2 . 

 Sparrow-Hawk, Accipiter nisus (Linn.). — Average of 12 eggs 39 375 (37-42) 



X 32-5^5 (32-33)— weight I -821. 

 Peregrine Falcon, Falco peregrinus Tunst. — One egg 51 2 x 37 -8 — weight 



3S5- 

 Merlin, F. aesalon Tunst. — Average of 3 eggs 39-23X 31 -3— weight i -^S^, 

 Kestrel, F. tinnunculus Linn.— Average of 11 eggs 39 77 (38-42 •2)x 31 -23 



(29-8-33)— weight 1-6. 

 Cormorant, Phcdacvocorax carbo (Linn.) . — One egg 66 • 7 x 4 1 ■ 5 — weight 71. 

 Shag, P. graculus (Linn.). — Average of 3 eggs 61 •3X 38 4 — weight 4-833. 

 Gannet, Sida bassana (Linn.). — Average of 5 eggs 75 ■ 78 x 49 06 — weight 



10-966. 



The eggs of the Order Pehcaniformes are thickly incrusted on the 

 outside with a chalky secretion. In the above three species 

 this incrustation was not removed before weighing, but on 

 scraping it off one of the Gannet's eggs it was found that without 

 it this egg weighed 1 5 grammes less. 

 Mute Swan, Cygnns olor (Gmel.). — Average of 7 eggs 109-86 (10^-113-5) 



x 7214 (68 •5-75)— weight 38 •943- 

 Common Sheld-Duck, Tadorna tadovna (Linn.) [Tadorua conmtaj. — One 



t'gg <M>^ -15-7— ^veight O4. 

 Wild Duck or Mallard, Anas boschas Linn. [A. boscasj. — Average of 6 eggs 



58 • 72 X ^ 1 -92— weight 4 • 783. 

 Common Teal, Querquedula cvecca (Linn.) [Netiion crecca]. — Average of 



3 eggs 43 • 766 X 32 -4— weight i ■ 78. 



