442 



University of California Publications. [Geology 



proximal and distal fragments. The entire bone is almost exactly 

 equal in length to the specimen of Euxenura at hand. The shaft 

 is markedly more slender, the head less expanded, but the foot 

 is equal in width though less robust in the size and strength of 

 the condyles. Seen from in front the depression down the front 

 of the shaft is less abruptly overhung by the head; the inner 

 profile of the head is less obliquely beveled off ; the upper part 

 of the shaft is less deeply and widely excavated. Seen from the 

 inner side, the head is more compressed ; the hypotarsus is much 

 lower down ; the inner ridge of the hypotarsus is more salient at 

 its proximal end, a condition which is reversed in Euxenura and 

 in Ciconia alba. Seen from the rear the shaft is flatter and less 

 ridged in the proximal part, and merges more abruptly into the 

 head, giving a more concave outer profile in this region. This 

 point also distinguishes the form from C. alba. The intercotylar 

 tuberosity appears to be much more prominent because the surface 

 drops more abruptly from front to rear; the transverse crest 

 passing between the superior extremities of the hypotarsal ridges 

 slopes from within outward, being higher at its inner end. In 

 this respect the form agrees with C. alba and is distinguished 

 from Euxenura. The outer hypotarsal ridge is dropped further 

 below the inner than in Euxenura. 



Seen from the outer side the head agrees with Ciconia alba 

 in being less canted forward on the shaft. The slope backward 

 from the tuberosity shows a steeper profile than in Euxenura. 

 The postero-lateral oblique surface for the attachment of articular 

 ligaments is much more sharply defined in both C. maltha and 

 C. alba than in Euxenura. The slightly oblique intermuscular 

 ridge passing down the bone at this point in both Euxenura and 

 C. alba is entirely wanting in the type. This feature is hardly 

 due to corrosion, as the more exposed angles are very sharply 

 defined. 



Seen from the end the margins of the articular facets are 

 more clearly cut, the space between their posterior margins is 

 greater, and the depression between the articular portion and 

 the hypotarsus becomes a deep pit marked posteriorly by a pro- 

 nounced ridge. In this group of characters C. maltha and 

 C. alba are distinct from Euxenura. The hypotarsal ridges are 



