100 
ZOOLOGICAL LITERATURE. 
defimtion^ Prof. Huxley makes a group of them, of equal value with the 
other two, under the name of Pteroclomorphce. Further, the Turnicidcs differ 
much more from any one of these tliree groups than they do among them« 
elves, and accordingly are raised to an independent group as Tmniicimor- 
phce. The third section treats of the affinities of Opisthoco7mis, the osteology 
of which singular and puzzling form is described with great care j and the 
author proposes to regard it as the type and sole member of a gvoup which 
may be caUed Heterornoiphce. The fourth section considers the Taxonomic 
Conclusions to be drawn from the foregoing researches ; and its substance 
may be best summed up by a ^‘phylum” on the evolution theory as fol- 
lows 
Feristeropodes Aleetoropodes 
PtGroclomo)phcQ 
Tumicimorphce 
CharadriomorphcB 
Peristerommphcs 
Ileteromorphce 
Tmamornorphce 
CAEINATHi) RATITiE, 
The fifth section is devoted to the GeogTaphical Distribution of Alectoro- 
morphcG j and to the understanding of this the map which the author ap- 
pends is of much use. The area occupied by the Peristeropodes lies mostly, 
though not at all wholly, south of the equator j a lino drawn to limit their 
northern extension would cross America in Mexico, then, sweeping southward 
and eastward, would round the Cape of Good Hope, leaving Africa as well 
as India and the Indo-Malayan province entirely to the north, but taking in 
the Nicobar Islands ; then, following what Prof. Huxley well proposes to call 
Wallace’s Line” {Cf, Ibis, 1859, pp. 440-454), through the Straits of Ma- 
cassar, but comprehending the Philippine Islands, it travels southward and 
eastward to the Samoan Archipelago. This, oa has been stated, is the 
northern limit of thu Pvviatci'opodos] i\\a Aleclot'opodcH^ on the otlier hand, 
occupy the great northern area thus excluded, only a few forms of Coturnixj 
Odontophorus (with its allies), and Meleapris occurring to the south. For 
the rest of this paper we again refer to our previous remarks. [See Ge- 
neral Subject.”] 
CRACIDiE. 
The statement with respect to the interbreeding of Ortcdida maccalli with 
the domestic Fowl (Zool. Kec. iii. p. 107) confirmed by a similar assertion 
in regard to 0. vetula (?). A. Duges, Bull. Soc. Imp. d’Acclimat. 1868, 
