86. Pteroclidæ Sand-grouse. 87. Tetraonidæ Partridges and Grouse. { Pavoninæ Peafowl. { Lophophorinæ Tragopans, &c. { Phasianinæ Pheasants. 88. Phasianidæ { Euplocaminæ Fire-backed Pheasants, &c. { Gallinæ Jungle-fowl. { Meleagrinæ Turkeys. { Numidinæ Guinea-fowl. 89. Turnicidæ Hemipodes. 90. Megapodiidæ Mound-makers. { Cracinæ Curassows. 91. Cracidæ { Penelopinæ Guans. { Oreophasinæ Mountain-pheasant. 92. Tinamidæ Tinamous. {97}The Opisthocomi consist of one family containing a single species, the "Hoatzin" of Guiana. Family 93. Opisthocomidæ. The Accipitres, or birds of prey, which were long considered to be the highest and most perfect order of birds, are now properly placed lower down in the series, their affinities being more with the aquatic than with the perching birds. The following is the arrangement adopted by Mr. Sharpe in his recently published British Museum catalogue of diurnal birds of prey:-- Sub-orders. Fam. Sub-families. { Vulturinæ Vultures. { 94. Vulturidæ { Sarcorhamphinæ Turkey-buzzards. { Falcones { 95. Serpentariidæ { { { Polyborniæ Caracaras. { { Accipitrinæ Hawks. { 96. Falconidæ { Buteoninæ Buzzards. { Aquilinæ Eagles. { Falconinæ Falcons. Pandiones 97. Pandionidæ Fishing-eagles. Striges 98. Strigidæ Owls. The Grallæ or Grallatores are in a very unsettled state. The following series of families is in accordance with the views of some of the best modern ornithologists: 99. Rallidæ Rails, &c. 100. Scolopacidæ Sandpipers and Snipes 101. Chionididæ Sheath-bills. 102. Thinocoridæ Quail-snipes. 103. Parridæ Jacanas. 104. Glareolidæ Pratincoles. 105. Charadriidæ Plovers. 106. Otididæ Bustards. 107. Gruidæ Cranes. 108. Cariamidæ Cariamas. 109. Aramidæ Guaraunas. 110. Psophiidæ Trumpeters. 111. Eurypygidæ Sun-bitterns. 112. Rhinochoetidæ Kagus. 113. Ardeidæ Herons. 114. Plataleidæ Spoonbills and Ibis. 115. Ciconiidæ Storks. 116. Palamedeidæ Screamers. 117. Phænicopteridæ Flamingoes.