The pelvis agrees so perfectly with that of _Strepsilas interpres_, and the _Charadriidæ_ in general, as not to require farther remark. The remainder of the skeleton resembles both the plovers and sandpipers. I much regret that I have never had an opportunity of dissecting a specimen of _Glareola_, to which the genus, _Tinochorus_, appears closely allied, and I believe that they will form a connecting link between the orders _Grallatores_ and _Razores_. INDEX TO THE SPECIES. _N.B._ The Synonyms are in Italics. _Ada Commersoni_, 51 Agelaius chopi, 107 —— fringillarius, 106 —— _chrysopterus_, 106 —— _virescens_, 107 Aglaia striata, 97 —— vittata, 98 Agriornis, 55 —— gutturalis, 56 —— striatus, 56 —— micropterus, 57 —— maritimus, 57 _Agriornis leucurus_, 57 Alaudinæ, 87 _Alauda cunicularia_, 65 —— _nigra_, 84 —— _rufa_, 84 —— _fulva_, 84 _Albatuitui à collier noir_, 127 _Alcedo torquata_, 42 —— _Americana_, 42 —— _Senegalensis_, 41 Alecturus guirayetupa, 51 _Alouette noire à dos fauve_, 84 —— _à dos rouge_, 84 _Amblyramphus bicolor_, 109 —— ruber, 109 Ammodramus Manimbè, 90 —— _xanthornus_, 90 —— longicaudatus, 90 _Anas Antarctica_, 134 —— _brachytera_, 136 —— _erythrorhyncha_, 135 —— _creccoïdes_, 135 —— _Magellanica_, 134 —— _urophasianus_, 135 —— _Bahamensis_, 135 Anser melanopterus, 134 Anthus furcatus, 85 —— Chii, 85 —— _fulvus_, 84 —— _variegatus_, 84 —— correndera, 85 _Anumbi rouge_, 80 Anumbius ruber, 80 _Aquila pezopora_, 13 —— _megaloptera_, 21 Ardea leuce, 128 —— _Egretta_, 128 —— Herodias, 128 —— _nycticorax_, 128 —— _violacea_, 128 —— _callocephala_, 128 Athene cunicularia, 31 Attagis Gayii, 117 —— Falklandica, 117 _Becassine, 1^e Espece_, 131 _Bec d’argent_, 51 _Bernicla leucoptera_, 134 —— antarctica, 134 _Buteo tricolor_, 26 —— varius, 26 —— ventralis, 26 —— erythronotus, 26 Buteoninæ, 22 Cactornis assimilis, 105 —— scandens, 104 _Caille des Isles Malouines_, 117 Camarhynchus psittaculus, 103 —— crassirostris, 103 Caprimulgidæ, 36 Caprimulgus bifasciatus, 36 —— parvulus, 37 Cathartes aura, 8 —— atratus, 7 —— urubu, 7 _Certhia antarctica_, 67 Certhidea olivacea, 106 _Certhilauda cunicularia_, 65 Ceryle torquata, 42 —— Americana, 42 Charadrius virgininus, 126 —— _marmoratus_, 126 —— _semipalmatus_, 128 —— _bifasciatus_, 127 —— _trifasciatus_, 127 —— _rubecola_, 126 —— _Azaræ_, 127 —— _collaris_, 127 —— _Cayanus_, 127 _Charpentier des champs_, 113 _Chii_, 85 _Chingolo_, 91 Chionis albâ, 118 Chloephaga Magellanica, 134 Chlorospiza xanthogramma, 96 —— melanodera, 95 _Chopi_, 107 Chrysometris campestris, 89 —— Magellanica, 97 Chrysoptilus campestris, 113 _Churrinche_, 44 _Circaëtus antarcticus_, 15 Circinæ, 29 _Circus histrionicus_, 50 —— megaspilus, 29 —— cinereus, 30 _Clignot ou Lichenops_, 51