1897.] 



ME. F. E. BEDDAED ON INTEECENTEA IN BIEDS. 



46t 



somewhat conical iutercentrum. The five following intercentra 

 are "hypocentra" — that is to say, they are completely aukylosed 



Fig. 1. 



Caudal vertebrae of Biziura lohata. 1, lateral view ; 2, from below. 

 Pel., pelvis; a, hypocentra; b, free intercentra. 



with the centra; a lateral notch only remains to prove their 

 distinctness from the centra. 



In Tachyeres cinerea there is a granule of bone only to represent 

 the first intercentrum of Biziura; the two next vertebra; have 

 short hypocentra, these increase in the three next ; between the 6th 

 and the 7th is a free conical intercentrum mainly attached to but 

 not ankylosed with the last free caudal. 



Sarcidiorals carunculata, which has five free vertebrae behind 

 the last, which has acquired an attachment to the pelvis, has two 

 free conical intercentra lying between nos. 3/4 and 4/5. 



In Fuligula rufim there is an ankylosed hypocentrum_ on the 

 fourth free caudal. In the two remaining free vertebrae in front 

 of the pygostyle the intercentra are not ankylosed. 



Plectropferus rjambensis has a minute nodule between the_ first 

 and second free caudals, and four hypocentra upon the remaining 

 vertebrae, ankylosed. 



In Bernida brenta there are minute nodules between C. 1 and 

 C. 2 and between C. 2 and C. 3, but no hypocentra beyond. 



Palamede^e. 



In Chauna clerbicma there are four free caudals. 

 four intercentra which increase in size. 



There are 



