48 MR. W. p. PYCRAFT ON THE [May 2, 



vii. The Pelvic Girdle. 



Outside the Passerine series the pelvic girdle of the Euryljemidfe 

 resembles most nearly that of the Capitonida? ; from which, however, 

 it may be distinguished by the fact that whereas in the Euryleemidse 

 the post-acetabular ilium is produced caudad into a spine, in the 

 Oapitonidee this backward extension is broad and bifurcate. 



Among the Passeres it approximates most closely perhaps to that 

 of Ghasmorhynchn,s. Cymhirhynclms only, among the Eur-ylfemidte, 

 appeal's to possess even a vestige of the pectineal process. In 

 Calyptomena the pre-acetabular ilium is broad throughout its v/hole 

 length, and sharply truncated anteiiorly. The infei-ior boi'der 

 thereof is markedly sinuous. The pre-acetabulee of the right and 

 left sides are widely separated one from another ; and rise so-as to lie 

 nearly level with the ridge of the neural crest of the synsacrum, 

 thus forming a large, open, canalis ileo-hmibalis. The post- 

 acetabular region of the ilium is expanded to form a broad dorsal 

 plane, and passing backwards terminates in a long spine, which, in 

 Cymbio-hyncJnis and Coryclon, is closely applied to the free ends of 

 the transverse processes of the post-synsacral caudal vertebree. 



The ischitmn in Galyptomena is long, produced backwards consi- 

 derably beyond the level of the jDost-acetabular region of the ilium, 

 and terminates in a downwardly-directed hook-shaped process which 

 fuses with the pubis. CymhirhyncMis differs but slightly from 

 Galyptomena is this respect. In Corydon the ischium is shorter 

 antero-posteriorly, and deeper, than in the two genera just described, 

 and does not pi'oject beyond the level of the free end of the post- 

 acetabular ilium. Further, the dorsal border of the pre-ilium is 

 much cut away anteriorly so as to expose a great portion of the 

 synsacral neural crest. 



The ischio-pubic fissure is closed in all three genera here 

 desciibed ; the obturator foramen is shut off thei'efrom by a bony 

 bar. 



The pubis is long and straight, and projects beyond the level 

 of the ischium, especially so in CalyjAomena. 



The close approximation of the post-acetabular ilium to the 

 transverse processes of the free caudal vertebrae is due to the 

 shortness of the transverse processes of the synsacral vertebrae 

 already referred to. 



The fovea lumhalis is small ; and the fovea ischiadica and 

 jnulendalis are confluent. 



viii. The Pectoral Limb. 



The pectoral limb of the genera here described presents no 

 marked differences by which they can be distinguished one from 

 another. 



It resembles that of the Coliidai and Oapitonida3 in that 

 metacarpal II. sends backwards from its proximal end a small 

 triangular bony spur (intermetacarpal process) to abut against 



