176 Letters, Extracts, Announcements, 5fc. 



Cypselid^. Any. 



TROCHiLiDiE. Any large forra^ especially Patagona. 



Caprimulgid.^. Batrachostomus, jEgotheles, Podager, 

 Nyctibius, and almost any others. 



PiciD^. Any except the three commoner English species. 

 Sphyrapicus I particularly want ; also Picumnus, Vivia, and 

 Sasia. 



Capitonid^. Any except MegalcEma. 



CucuLiD.E. Nearly any forms, especially Phoenicophaes, 

 Scythrops, Cent r opus, and Coua. 



PsiTTACiDTE. In this group nearly the only forms required 

 are Cyclopsitta and Pezoporus. Young nestlings of Stringops 

 (the younger the better, or even well-incubated eggs) would 

 also be very interesting. 



Galling. Oreophasis, Agelastus and Phasidus, Leipoa, 

 and Megapodius are my chief desiderata here. 



CoLUMBiD^. Here also my wants are few; any species of 

 Carpophaga and Ptilopus would be welcome ; also Otidiphaps, 

 if it can be got ! 



TuBiNARES. Any species will be very acceptable, as I am 

 engaged on a memoir on the anatomy of the group for the 

 voyage of H.M.S. 'Challenger.' 



In the remaining groups the following genera are still very 

 imperfectly, or not at all, known anatomically ; all present 

 special features of interest : — 



Platalea (except P. leucorodia and ajaja), Anastomus, Ba- 

 Iceniceps, Esacus, Mergulus, Phaleris, &c., Plotus (exc. P. 

 anhinga), Thinocorus, Mesites, and Attagis ; also the Turni- 

 ciD^ — Pedionomus (particularly wanted) ; Rhynchaa, Ibido- 

 rhijnchus, Tachydromus, Pterocnemis { = Rhea darwinii) , Tina- 

 motis and Calodromas (both particularly wanted ; the latter, 

 at least, ought to be obtainable) ; Parra and Hydrophasianus, 

 Heliornis and Podica, Dromas, Rhynchops, and Palamedea 

 (not Chauna). 



It is also greatly to be desired that the osteology and ana- 

 tomy of the lately discovered short-winged Rails of the genera 

 Megacrex and Pennula should be properly examined before 

 they become (as they almost certainly will shortly) extinct. 



