MR. W. K. PARKER ON THE OSTEOLOGY OF THE KAGU. 511 
Cervical. Dorsal, | Lumbo-sacral. Caudal (free). 
eect | 
PSOPRUGCTEPUONS ow ce wee 18 6 17 6 
Rhinochetus jubatus .... 2... «| 16 5 15 is 
Eurypyga helias ........+- 05. 18 5 13 i 
Botquyrus VUrvdts ow cee cc | 13 4 14 | 6 
Anthropoides stanleyanus ...... 19 | 5 17 | rr 
Balearica pavonina .........- | 20 6 
Gis Onlegone:. free oes ews | 19 (i clang le aii are | 7 
In the Psophia there is one pair of free cervical ribs, and one perfect lumbo-sacral arch ; 
behind this there is a free styloid rib occasionally on the right side, the left coalescing 
with the sacrum; there is one pair of abdominal ribs. In the Kagu there are two pairs 
of free cervical ribs, and one nearly perfect lumbo-sacral arch (Pl. XCI. fig. 1); there 
is no abdominal rib. In the Ewrypyga the cervical ribs are all ankylosed to the ver- 
tebree; there is one perfect lumbo-sacral arch, small free ribs to the second of that 
series, and a very small abdominal rib on each side. In Botaurus viridis there are free 
ribs to the last two cervical vertebra, a nearly perfect lumbo-sacral arch, and a pair of 
styloid abdominal ribs. 
In the Anthropoides stanleyanus there are two pairs of free cervical ribs, three pairs 
of lumbo-sacral ribs, the last of which is apt to become ankylosed to the sacrum. 
In the Balearic Crane there is only one arch developed from the lumbo-sacral region, 
and it is perfect ; but in Grus antigone two pairs of such arches exist, and a pair of styloid 
floating ribs behind them. 
In the Kagu, the Psophia, and the Eurypyga the first four dorsal ribs are ankylosed 
together; in Grus antigone the last cervical and first two dorsal blend together; in 
Balearica pavonina the first two dorsals only, whilst the Stanley Crane agrees with the 
Bittern and the Heron in having these bones free of each other—at least for some 
years. 
The last caudal vertebra may, at least, count for seven (it is composed of ten in the 
Duck) ; and thus the number six ought to be added to the seven caudal. We may thus 
make a numerical comparison of the whole series as follows :— 
Total Nr. of Vertebrix. 
ESO DUA CACLEPTUUISY,. «tats erel settee ee eho cela) eralaia ole afeleca rete; '« 53 
TRIAPOCHELUS GUDAUS, ie. 5 aie aie wie cn 610 ATS an «Ap ere 49 
TTB GE OAL rg 3 SED OREO ORO DATS Ona OO TONS 49 
IBPAMIRIR DRIES Ree ROy dope ou NCe HOU amano OR ooT On 43 
Anthropoides stanleyanus .... 6.002 c eee tenn eees 54 
These numerical comparisons are of considerable interest, thus:—We see that the 
Eurypyga and the Kagu have the same total number of vertebra, although they are 
disposed of differently, that the Psophia differs but little from the typical Cranes, that 
the dorsal vertebre are more confluent in the aberrant Gruine forms than in the types, 
and that this character is not constant in the typical genera. 
VOL. VI.—PART VIII. 4B 
