GIANT TURTLE FROM QUEENSLAND LOWER CRETACEOUS.— LONGMAN. 27 



end is missing from the mesial process, but the curves shown evidence a more 

 globose form than the obtusely pointed process seen in adult (but not in 

 immature, where it is spherical) specimens in the Queensland Museum. On the 

 outer or ulnar edge the portion preserved somewhat resembles Lytoloma 

 (Euclastes) gosseleti, Dollo, 6 but the distal curves of the head do not suggest a 

 very bulky lateral process adjoining. Just prior to the fracture, the terminating 

 of the intertubercular fossa is marked by an ascending process (Fig. 2, B), which 

 is the commencement of the tubercular mass adjoining the lateral or radial 

 process. 



In section the elliptical contours of this bone, the axes of which are set at 

 right angles to each other, correspond closely to those of C. mydas. Dimensions : 

 Max. diam. head, 150 mm. ; max. diam. through head and shaft, 203 mm. 



Various forms of Testudinate humeri have been studied and figured by 

 Wieland, 7 who points out that they furnish as readily distinguishable and 

 important characters as the carpus. Our bone is undoubtedly of the thalassic 



H 



M P 



— --B 



Fig. 2. — Cratochelone bemeyi. Proximal end of Left Humerus : palmar view. 



H, head ; MP, mesial process ; B, base of tubercular mass. 

 Del. C. AT. Rossi/er. 



6 Dollo, Geol. Mag., June 1888, p. 266, fig. 2. 



7 Wieland, ' ' Evolution of the Testudinate Humerus, ' ' Amer. Jo urn. Sci., 1900, p. 419. 



