662 CLASS xvii. 



Sp. a. With fore feet tetradactylous, hind feet pentadactylous. Myrmecophaga 

 jubata L., BUFF. x. Tab. 29 (fig. deformed), Suppl. in. PI. 55 (scarcely 

 better), BLUMENB. Abbild. naturh. Gegenst. No. 82, Diet. univ. d'Hist. nat., 

 Mammif. PL 16, fig. 2; this is the largest species, and attains nearly four 

 feet, besides the tail, which is more than i\ feet long. The hair is long, 

 especially on the back forwards and on the tail, and bristly; the colour is 

 grey with black throat and a triangular black spot ascending from this 

 obliquely over the shoulders; Brasil, Surinam. Myrmecophaga tetradac- 

 tyla L. (and tridaciyla ejusd., a species to be suppressed), Myrmecophaga 

 tamandua Cuv., SCHREB. Saugth. Tab. 68 (fig. of MARCGRAFF), RAPP 1. 1. 

 Tab. 1 1, fig. i (2d edit. Tab. 1 1, 6) ; smaller, the tail scaly at the extre- 

 . mity ; variously coloured. (TEMMINCK distinguishes this Brazilian species 



as Myrmecophaga bivittata from the species from Surinam which he names 

 Myrmecophaga tamandua, yellowish-grey, one-coloured, with longer tail 

 and somewhat larger ears.) 



(3) With fore feet didactylous, hind feet tetradactylous. (Snout shorter. 

 CoOjt thick, woolly). Sp. Myrmecophaga didactyla L., SCHREB. Saugth. 

 Tab. 66, BLUMENBACH Abbild. No. 22, GUE"R. Icon., Mammif. PI. 35, fig. 

 2 ; this small species lives in Guiana and Surinam ; the ribs are very broad 

 and flat, and their posterior margin overlaps the anterior margin of the 

 succeeding rib. In this species the vessels of the fore limbs form plexuses ; 

 compare on their anatomical structure DAUBENTON, BUFF. x. pp. 165 

 175, J. F. MECKEL Archivf. d. Physiol. v. 1819, s. i 67. 



Orycteropus GEOFFR. Sx.-HiL. Incisors and canines none, 

 molars various according to age ^ ^ , in the aged ^ = , cylin- 



O D O O 



drical, composed of vertical tubes, with flat crown. Body hairy. 

 Feet short, anterior tetradactylous, posterior pentadactylous, with 

 claws strong, fossorial, ungular. Ears elongate, acuminate. Tail 

 moderate, thick, hairy. 



Sp. Orycteropus capensis GEOFFR., Myrmecophaga afra PALL., Myrmecophaga 

 capensis GM., GUERIN Iconogr., Mammif. PI. 35, fig. i, PALLAS Observa- 

 tiones circa Myrmecophagam africanam e litteris Cel 1 . P. CAMPER, excerptce 

 et illustrates. Act. Acad. Scientiar. Petropolit., pro anno 1777, p. 223, 

 Tab. IX. B ; comp. H. F. J.EGER A nat. Untersuchungen des Orycteropus 

 capensis, Stuttgart, 1837, 4to (with a fig. copied in RAPP 1. 1. Tab. i). 

 This species, het aardvarken of South Africa, lives in subterraneous cavities 

 and attains a length of 4 feet and more. In the skeleton itself there are 

 only four toes on the fore feet, whilst that of Myrmecophaga jubata has 

 five; the cervical vertebrae are particularly strong. (In Abyssinia also and 

 in Senegal similar animals occur which have been regarded as different 

 species. See SUNDEVALL Vetensk. ATcad. Handl. 1842, pp. 236 242, Du- 

 VERNOY in GUER. Revue et Magas. de Zool. 1852, pp. 581, 582, and Mem. 

 sur I'Oryct. duNil, &c. Ann. des Sc. nat. 3ieme SeY. xix. pp.iSr 202, PI. 

 9, 10.) Compare on the structure of the teeth in Orycteropus F. CUVIER 

 Des dents des Mamni. PL 82, and OWEN Odontogr. pp. 317 320, PL 77, 78. 





