Bill black. Feet light dull brownish-yellow. Forehead, a band over the eye, fore part of neck, and all the rest of the lower surface, white; top of the head and nape dark yellowish-brown, sides and hind part of the neck dull ochre-yellow, which is the prevailing colour on the upper parts, the feathers being broadly margined with it while their central portion is greyish-brown. Wing-coverts lighter; primary coverts and quills dusky, their shafts and margins white, that colour becoming more extended on the inner and on some of the secondaries, so as to form a conspicuous patch on the wing; inner secondaries like the back. Tail yellowish-brown, tipped with yellowish-white, the two outer broadly margined with the same. Length to end of tail about 8-1/4 inches, to end of wings the same, to end of claws 9-1/4; wing from flexure 6-1/8; tail 2-1/2; tarsus 1-(4-1/2)/8; middle toe 3/4, claw 1/4. GREAT CINEREOUS OWL. _STRIX CINEREA_, GMELIN. PLATE CCCLI. This fine Owl, which is the largest of the North American species, is nowhere common with us, although it ranges from the north-eastern coast of the United States to the sources of the Columbia River. It has been procured near Eastport in Maine, and at Marble Head in Massachusetts, where one of them was taken alive, perched on a wood pile, early in the morning, in February 1831. I went to Salem for the purpose of seeing it, but it had died, and I could not trace its remains. The gentleman, Mr IVES, in whose keeping it had been for several months, fed it on fish and small birds, of which it was very fond. Besides shewing me various marks of attention, he gave me a drawing of it made by his wife, which is still in my possession. It uttered at times a tremulous cry not unlike that of the Little Screech Owl, _Strix Asio_, and shewed a great antipathy to cats and dogs. In the winter of 1832, I saw one of these Owls flying over the harbour of Boston, Massachusetts, amid several Gulls, all of which continued teasing it until it disappeared. I have seen specimens procured on the Rocky Mountains by Dr TOWNSEND, and several brought to London by the medical officer who accompanied Captain BACK in his late Arctic journey. Among the individuals which I have examined I have found considerable differences as to size and markings, which may be attributed to age and sex. My drawing was taken from a remarkably fine specimen in the collection of the Zoological Society of London.