OOLOGY. 



17 



HALOBiENA CJERULEA, {Gm.) Bj). (p. Si.) 



Nests in deep tortuous burrows iu bill-sides near tbe sea. Egg is 

 single, ovoidal, and dull wbite, without color-markings. In tbe speci- 

 mens measured, there is, however, as shown by tbe figures, tbe usual 

 range of variation in contour. They remind one, in size and shape, of 

 the eggs of a bantam hen. Shell is thin, homogeneous, and compact in 

 structure, presenting under the lens a finely granular external surface. 

 First found October 23. 



The measurements are as follows: — 



The newly-hatched young have bill and toes slaty blue, with appar- 

 ently pale-yellowish webs and brownish-black claws. The horny speck 

 upon the" bill is whitish, and situated high above the tip of the bill. The 

 region about the base of the bill is largely denuded. They begin to 

 hatch about November 12. 



Pelecanoides urinatrix, {Gm.) Ladpede, (p. 36.) 



Lays one egg in a burrow in the hill-side, generally selecting the same 

 locality as Halombna cccrulea. Burrow is straight, slanting slightly 

 downward, and less deep than that of Halohcena. E^g is a regular ovoid, 

 tending in some specimens to ellipsoidal. First found December 10. 

 Shell is white, thin, brittle, compact, and homogeneous in structure. No 

 color-markings. 

 2 K 



