278 Riippell's Neiie Wirbelthierc. 
Three Lamprotorni, L. tenuirostris, L. rufiventris, L. chaly- 
beus. Oriolus moloxitta, Buflfon, Tab. 12, Fig. 1, which appears 
hitherto to have been confounded by various authors, as identical with 
some of the other black-headed species. Prionops crisiatus, Riipp. 
Tab. 12, Fig. 2, interesting as being a second species of the genus, 
perhaps identical with Lanius cineraceus of Latham. Perdlt me- 
lanocephala, Riipp. Tab. 5, allied in the form, colouring, and distri- 
bution of the markings to the little group, of which the red-legged 
partridges, P. rubra, saxatilis, and their allies of southern Europe 
and northern Africa are typical. A very beautiful bird, and appa- 
rently rare, as only two specimens were procured. 
Perdix melanocephala, Riipp Vitta frontali supra pileum ad nucham usque 
ducta, infraorbitali, et collari ab regione parotidea, quas ex albido et nigro 
striolata, per latera colli ad pectus plaga angustiori elongata, nigris ; vitta su- 
perciliari lata et gula nivea ; collo et medio abdominis ex isabellino rufescente ; 
corpore supra schistaceo, plumis margine rufescentibus, infra dilution ; hypo- 
chondriis fasciis albescentibus utrinque nigro marginatis ; cauda supra subtilissi- 
nie undulata ; rostro et pedibus colore corallino. 
Perdix Erckellii, Riipp. Tab. 6, coming into the division which 
contains the P. nudicollis of authors. 
P. Erckellii, Riipp Pileo castaneo ; frontis et faciei plumulis rigidioiibus 
nigris albo striolatis ; macula post oculari et gula albis ; plumis colli castaneis, 
albo marginatis pectoris griseis,* stria intermedia lanceolata castanea abdomi- 
nis, crissi et hypochondriorum albicantibus stria intermedia lanceolata et mar- 
gine castaneis Dorsalibus et alarum tectricibus hepaticis, margine castaneis, 
tergo, uropygio, rectricibus et remigibus hepaticis, secundarium vexillis extends 
colore dilution undulatis, rostrum et pedes colore corneo, pedes maris bicalcarati. 
A fine Otis, O. melanogaster, Riipp. Tab. 7> is figured ; the con- 
clusion of the description is, however, deferred till next number : 
melanogaster is. not a very good appellative for any of the bustards, 
as the summer or breeding plumage of nearly all is deep-black on 
the lower parts. 
The part containing the Reptiles consists of figures and descrip- 
tions of three tortoises. Pentonyx gehafie, Riipp. Tab. 1, somewhat 
similar to the Test, subrufa of the Cape of Good Hope, but differs 
from it by a character which also separates it from all the other tor- 
toises known, viz. the pectoral pair of plates are triangular, and do 
ni)t reach to the centre of the sternum. If many specimens had not 
been found, one would at first sight have been induced to have con- 
sidered this structure as an accidental formation. The other true 
chelones belong to the genus Chelonia, the species of which are so 
difficult to determine, on account of the great variation which take 
