APPENDIX. Tue best known Monograph of the Paradiseide hitherto published is that by Mr. D. G. Elliot. This Monograph was written in 1878: it is illustrated by magnificent plates, lithographed by Smit from original drawings by Joseph Wolf. Gould, in his ‘ Birds of New Guinea,’ figured nearly every species known in his day, and he had intended to publish a complete Monograph of the Family, for which purpose he kept the lithographic stones from which the plates in his above-mentioned work had been prepared. ‘Thus it came to pass that when Messrs. Sotheran purchased the stock of Gould’s works after his death, they acquired the stones with which he had intended to illustrate his Monograph of the Paradisecde. Many of them were broken or otherwise damaged, and of these some have been redrawn or replaced by new plates by Mr. Hart. Since Gould’s time, however, many marvellous new species have been discovered, and these have been described and figured in the present work. The most elaborate memoir of the Birds of Paradise, however, is that published by Count Salvadori in his ‘ Ornitologia della Papuasia e delle Molucche.’ With the exception of the Australian species, which did not come within the scope of Count Salvadori’s work, every Bird of Paradise and Bower-Bird is treated of in a way that practically exhausted the subject at the time; and I may once more take the opportunity of acknowledging the obligation l owe to the labours of my friend Count Salvadori, as from his work the synonymy of most of the species in the present Monograph is taken. In 1894 I published a list of the Paradisecde and Ptilonorhynchide (Bull. Brit. Orn. Club, iv. pp. xii—xv). It is not so complete as it ought to have been, as I omitted Ptertdophora alberti and Craspedophora alberta, and the number of species should have been 84 instead of 82. Dr. A. B. Meyer, who has always occupied himself with the study of the Paradiseide, and has described some of the most wonderful forms, such as Ptertdophora alberti, Astrarchia stephanie, Paradisornis rudolphi, &c., has recently published a complete list of the known species (Abhandl. k. zool. Mus. Dresden, vii. no. 2, pp. 39— €3). This is an invaluable contribution to our knowledge of the Birds of Paradise, of which 96 species are now recognized by Dr. Meyer. Lastly, in the ‘Thierreich,’ the Hon. Walter Rothschild has monographed the Paradiseide@ once more, and his essay is, therefore, the latest revision of the Family. As he has admitted in a recently published paper in his ‘ Novitates Zoologice’ (v. pp. 84-87), he differs considerably from me and from the other ornithologists above named in his estimate of the worth of certain genera and species. In place, therefore, of giving a complete historical list of the literature appertaining to the Paradiseide and Ptilonorhynchide, as was so well done by Mr. Elliot in his ‘Monograph’ that it would have to be copied here, I have decided merely to give a list of the species as recognized by me at the conclusion of the present ‘Monograph,’ with a few additional criticisms on the work of Dr. Meyer aud the Hon. Walter Rothschild, so as to bring the book up to date. J