1890.] THE STRUCTURE OF PSOPHIA. 335 



In (1) Pso^ihia most resembles Eurypyga, Cariama, Chun(ju. 

 In (2) ,. ,, „ Cariama, Cliunr/a, Rhinochetus. 



In (3) ,, ,, ., Cariama and Ghunxja. 



In (4) ,, ., ,, Rallidse, Rhinochetus, Cariama, 



Clmnga, (Edicnemus. 

 In (5) ,, „ ,, Rliinochelus, (Edicnemus, Cariama, 



Chung a. 

 In (G) ,, ., ., Cariama, Chuncja, Rallidrc, O'Jdi- 



cnemus. 

 In (7) ,, ,, ,, (Edicnemus. 



In (8) ,, ,, ,. Cariama, Chunga. 



In (9) ,, ,. ,, Cariama, Chunga. 



In (10) ,, ,, ,, (Edicnemus, (Cariama. 



In (11) ,, ,, ., (Edicnemus, Ciiriama, GlnDnjd. 



In (12) ,, ., ,, (Edicnemui<, Rhinochetus, Cariama, 



Chiiiujd. 

 In (13) ,, ,, ,, (Edicnemus, Rhinochetus, Chuniju, 



Cariama, Eurijpyiju. 



In the greatest percentage of the above characters Psophiu resembles 

 the Caviamidfe, next come (Edicnemus and Grus, then Rhinoclietus. 



I 'el vis. 



A comparison with the pelvis of a Crane {Tetrapteryx paradisea) 

 may conveniently serve to indicate some of the peculiarities of the 

 pelvis in Psophia, before comparing it with those of other types. 



The pelvis in Psophia is narrower, and the anterior part formed 

 by the prolongation of the ilia is not much longer than the posterior 

 part ; it covers only two ribs. 



The inner borders of the postacetabular portion of the ilia are 

 straight and lie close to the caudal vertebrae. The pubes come into 

 close relations with the ischia. The process of the ihum overhano-- 

 ing the acetabulum is not very well developed. 



In the Crane the contrary of all these conditions is found. The 

 whole pelvis is broader and the anterior narrow region is longer than 

 the posterior broader region. The inner borders of the postace- 

 tabular region of the ilia are concave and widely diverge from 

 the vertebrte of the tail. The suprailiac crest is well developed. 



Cariama and Chunga ' come nearer to the Cranes in every one of 

 the points enumerated except in the connection between the puljcs 

 and ischia. 



Aramides, Eulica, and Ocydromus come nearest to Psophia ; so 

 also do Purra and j)erhaps (Edicnemus. 



I do not lay any .stress upon the preacetabular process (pubis of 

 some writers), as it is absent or present in very closely allied forms ; 

 e. g. in Tetraptery.v paradisea (present) and Oru's austmlasiana 

 (absent). 



1 Prof. Piirkei- says (Osteology of the Kagii, loc. cif. p. ,51(5) :— " Plere let it be 

 reuuivked that tlic pelvis oi' J'sop/nfi is nioi-e like lliat of Oci/dromiis tliun that 

 of the typieal Ci-aur.«." 



