76 MR. T, E. GUNK OX THE 



the left. Botli oviducts represented by tliin strands only, the 

 left being more evident. 



Hen Harrier [Circus cijaneus). '-. 

 (PI. III. figs. l^-5^' ; PI. lY. fig. 2 ; PI. V. figs. 1-4.) 



l^. November 4th, 1893. ISTorfolk. Second year. Both 

 ovaries present ; eggs of a rich cream colour, small and of uniform 

 size. 



2*=. April 9th, 1900. Suffolk. Probably three years old. 

 This bird possessed two ovaries which contained eggs of two 

 sizes. 



3°. January 10th, 1908. Noi-folk. In second yeai-'s plumage. 

 Both ovaries present, the left one as large again as the right. 

 Both filled with small eggs of uniform size. 



4". January 7th, 1907. Sufiblk. In its second year. Two 

 ovaries present ; the left slightly the larger. Full of small 

 es'gs. 

 "Se. *t March 30th, 1911. Norfolk. Age two years. Both 

 ovaries equal, containing cream-coloured eggs of two sizes ; the 

 majority small, the light ovary having more larger-sized eggs than 

 the left. The two ovaries wei-e packed closer together than any 

 I had hitherto seen. 



Marsh Harrier {Circus ceruginosus). -. 



(PL III. fig. Id.) 



Id. April 17th, 1907. Derbyshire. Two years old. Both 

 ovaries piesent, the left a trifle the larger ; both full of small eggs 

 of uniform size. 



Montagu's Harrier (Circus cineracetts). ^. 

 (PI. III. figs. le-3e.) 



P. May 15th, 1903. Suffolk. Adult, three to four years old. 

 Both ovaries present, the right containing much larger eggs 

 oi varying sizes, the largest just half an inch in dia,meter, and 

 most of them of a bright orange colour. The left ovary contained 

 small eggs of a yellowish cream colour. 



2«. July 3rd, 1909. Suffolk. Tw^o years okl The two ovaries 

 present. Eggs very small, uniform in size, and of two shades of 

 colour — pale and deep yellow. 



3^. t June 17th, 1911. Suffolk. Adult, probably three years. 

 Two ovaiies equal ; containing a mass of eggs of various sizes and 



* Sections of the right and left ovaries ; photographs of the same. 



+ Stereoscopic photograph of the ovaries /» sitri. 



X Sections of the ri<:h1 and left ovaries; photntrraphs of the s«me. 



