Riippell's New Wirbelthiere. 
Capra rvalie, Riipp. Tab. 6, is very like the C. ibex, but it has a 
prominence between the base of the horns, and the legs are coloured 
like those of C. Nubiana and C. Siberica. 
The birds described and figured are three species of hornbill, Buceros 
cristatus, B. limbatus, and B. flavirostris, all somewhat allied, how- 
ever, to species already known. Corythaix leucolis, Riipp. Tab. 3, 
a new species, at once distinguished by the white patch at the ex- 
tremity of the auricular feathers, and making this beautiful genus 
now consist of six. 
Corythaix leucotis, Riipp Rostro coccineo ; palpebris superioribus papillis 
carneis ; pileo crista plicatili obscure viridescenti ornato ; collo et pectore laete 
prasinis ; abdomine et tibiis canescentibus j dorso, alls et cauda ex violaceo vi- 
ride-splendentibus ; remigibus ex sanguineo purpurascentibus viride marginatis 
macula anteocularis et plaga auricularis ad eollum decendens niveae. 
Chizaerhis zonurus, Riipp. Tab. 4. Very interesting, as being the 
second species of the genus, and observed by our traveller in the pro- 
vince of Dembea, &c. It is nearly of the size of the Ch. (muso- 
phaga) variegatus, and will be at once distinguished by the form of 
the crest, and the white band on the tail. 
Ch. zonurus, Riipp Rostro citririo, capite et collo ex badia fuscentibus, plu- 
mis nucb.se elongatis, lanceolatis, albo marginatis, gastraco et tibiis ex umbrino et 
albido variis Corpus supra ex umbrino cinerascens remigibus nigricantibus ; 
eorum vexillis internis macula alba. Rectrices dilute brunnae, earum concolores, 
quatuor externae media parte taenia ex albida lata, apicibus fuliginosis. 
Corvus crassirostris, Riipp. Tab. 8. Considered by Riippell as dis- 
tinct but closely allied to the strong-billed species of southern Africa. 
The distribution of the European crows is mentioned here (p. 10,) 
from which it appears that the C. comix is pretty abundant during 
winter between Cairo and Suez. C. monedula an$ frugilegus in 
lower Egypt, and Pica vulgaris during winter in lower Egypt. C. 
affinis and Capensis are described, but a diagram of the heads and bills 
is only given. Ptilonorhynchus albirostris, Riipp. Tab. 9. This is 
an interesting form j and, if true to the type of the genus in which 
Riippell has placed it, will show a wider distribution than what 
was imagined, the form not having been hitherto seen on the African 
continent. It is a gregarious species ; and, to judge from the habits 
and distribution of colour, and the figure which we have in this at- 
las, we should be inclined to consider coming closer to the Lampro- 
torni. The male and female are figured. 
Pt. albirostris, Riipp Mas, colore supra et subtus nigro splendore cseruleOj 
remigibus primaris rubiginosis, apice nigro, tectricibus majoribus et cauda ni- 
gris, rostro albido. Foem, cupite collo et pectore cinereo cserulescente. 
NO. III. T 
