568 MR. J. C. GALTON ON THE MYOLOGY OF 



posterior angle of eyelid to anterior border of concha of ear, 4 inches ; from anterior 

 border of concha to tip of ear, 7 inches ; from posterior border of calcanenm to tip of 

 nail of middle toe (plantar surface), 10^ inches ; from anterior border of radius, or pos- 

 terior border of wrist, to extremity of longest digit (dorsal measurement), 7f inches. 



The "manus" in this animal has only four digits, the pollex being rudimentary. The 

 homologue of the "middle" digit is the longest, the index being shorter, but of very 

 nearly equal length. This character serves to distinguish O. Capensis from the only 

 other species, 2E. JZthiopicus 1 . The homologue of the "fourth" finger comes next in 

 size, the little finger being by far the shortest. 



The " pes " has a large oval callosity in the centre of the sole. The heel is extremely 

 well marked, and is, moreover, covered on its plantar aspect with a callous pad. This 

 character, taken together with the plantar callosity, indicates obviously a plantigrade 



mode of pi 



Such a conclusion is supported by Daniell's figures, to which refer 



- 1 



ence has already been made 2 . 



Five digits are present, of which the middle is the longest, the second beii _ 

 but very nearly of the same length. The hallux comes next in size ; the root of its nail 

 is in a line with the tip of the little toe. 



— Though the arm is more easily abducted from the side than is the 



Upper extremity 



fore limb in the Armadillo described by me, the extension of the forearm from the upper 

 arm is, nevertheless, much limited, chiefly in consequence of the attachment of the strong 

 platysma along the outer aspect of the former. 



^ I must here crave indulgence for a looseness and seeming uncertainty in my descrip- 

 tions of certain muscles, seeing that I had no skeleton at hand while dissecting (a guide 

 of which those alone know the value who have ever dissected much)— my sole osteological 

 aid being derived from the plate of the skeleton of the Orycteropus contained in Cuvier's 

 ' Ossemens Fossiles,' which I had always at my side when at work, and from a single short 

 visit to the actual skeleton of this animal at the Museum of the Royal College of 

 Surgeons. The more precise descriptions are founded upon more certain observations, 

 and are, therefore, I hope, the more worthy of trust. 



Musculus stemalis brutorum (or superficial layer of pmmiculiis car nosus).— This is 

 exceedingly well developed in the Orycteropus, and extends from the labial commissure 

 to the lower extremity of the thorax. In the region of the head and neck its fibres are 



and darker 



delicate and pale ; but when the chest is reached, they beco. 

 colour, the bulk of the muscle being at the same time increased. 



At the commissure of the lips the fibres of the muscle appear to diverge, forming or 

 sending contributions to a kind of orbicularis oris. Thence they pass, uniform in breadth, 

 along the buccal interspace between the upper and lower jaws ; but on reaching the 



tLI^l'-Zjtl: u ™ f?^ Mumy ' h0WeTer > in a " S W»ic I^ of Speck, of Mammal* and theix 

 O^J^^^Zfr^^^ <*-■ S -ions * ,-. - 



Africa 



JEihiopkus, Sund., S. Xubia, near the White NH«, n ft—:, n^w- rvflv.™ B. W. 



In pi. 53 of « Shaw's Zoology 



plantigrade. 



(Mammalia), vol. i. part i. (Lond. 1800) 









