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Show 316 PROP. D ARCY W. THOMPSON ON THE [Apr. 2, backwards, diverging as they go, and combine with the former to form a complicated pattern on the back of the head aud nape. The more external of these two sends forward in the posterior part of its course a branch communicating with a short longitudinal row of feathers dorsal to the eye : iu the anterior part of its course it blends with a triangular patch of feathers, forming the ' loral area ' dorsal to the line of vibrissas that fringe the gape. Dorsal to the eye, and separated by a considerable interspace from the short row already mentioned, comes another more complete row, of somewhat stiff and prominent feathers, and external to it again the eyelid bears two incomplete rows of feathers ou its dorsal surface, and Text-fig. 80. Pterylosis of head of Caprimulgus macrurus, from above and from the side, then a fringe of stiff eyelash-feathers at its edge; these eyelash-feathers are continued round the edge of the lower lid also. The row of vibrissas, of which 10 or 11 are conspicuously stiff, is continued backward into a row of softer feathers that run between the ear and the eye towards tbe general feathering of the back of the head. Immediately dorsal to them is another row of smaller feathers, which may, in like manner, be traced backwards along a similar course diverging somewhat from the former; and as they rim below the eye they resemble, aud at the anterior canthus they |