_Campephilus principalis_ Southern United States. _Pyrrhula pyrrhula murina_ Azores. _Stringops habroptilus_ New Zealand. _Anthornis melanocephala_ Chatham Islands. _Gallinago pusilla_ Chatham Islands. _Thinornis novaezealandiae_ Chatham Islands. _Amazona augusta_ Dominica. _Amazona bouqueti_ St. Lucia. _Amazona versicolor_ Dominica. _Hemignathus lanaiensis_ Lanai, Sandwich Islands. Many of my readers will, I fear, find fault with me for having bestowed names on a number of forms, known only from fragments of bones, single bones, or two or three bones. Especially will they, I fear, blame me for doing this when these forms have been described by other authors who have refrained from giving names. My reasons for doing so are very simple: in such cases as Dr. Parker's species which are fully described, but quoted under the formula _Pachyornis species A_ or _Anomalopteryx species B_, the danger lies in different authors using the same formula for quite other species. In the case of others, where an author fears to name a form, but gives the distinctive characters and quotes only _Casuarius species_ or _Emeus sp._, unless the author and page are quoted, confusion must arise, and so in both cases I have thought it easier for reference and also more concise to name all these forms which have been described or differentiated without a binomial or trinomial appellation. I have, however, refrained from doing so in the foregoing list of Pleistocene species in the {xiii} following eight cases as I was not able to decide anything about them with the material or literature at my disposal, viz.:-- _Phalacrocorax sp._ Lydekker New Zealand. _Anser sp._ Lydekker England. _Cygnus sp._ Lydekker Malta. _Gallus sp._ Lydekker New Zealand. _Gallus sp._ Lydekker Central Germany. _Phasianus sp._ Lydekker Germany. _Perdix sp._ Issel Italy. _Tetrao sp._ Issel Italy. * * * * * {xv} LITERATURE REFERRING TO EXTINCT BIRDS.