FAMILY ADAPID^). 



The different species associated together under this family 

 are abundantly known from the Upper Eocene of France, 

 England, and North America. They are remarkable in having 

 an extra pre-molar in both jaws, the dental formula being 

 I, Cf, PA, Mf. 



GENUS ADAPTS. 

 Adapts, Cuvier, Ossem. Foss. (2) iii., p. 265 (1822); Flower, 



Ann. and Mag. N. H., xvii., (1876), p. 323. 

 Palaolemur, Delfort, Act. de la Soc. Linn. Bord., xxix., pp. 



8 7~95> Pi- 5 (1873) ; id- C. R., Ixxvii., p. 64 (1873). 

 Aphelotherium, Gervais, Zool. et Pal. Frang. (i), ii., Exp. 34 



(1848-52). 

 Ccenopithecus, Riitim, Denksch. Schw. Ges. Nat., xix., p. 88 



(1862). 



Notharctus, Leidy, Geol. Surv. Mont., p. 364 (1871). 

 1 Thinolestes, Marsh, Am. Jour. Sci., 1872 (2), p. 205. 

 ? Telmalestes, Marsh, op. cit., p. 206. 



" The general form of the cranium," to quote Sir W. Flower, 

 " the large size and anterior direction of the orbits, the small 

 and narrow muzzle . . . show its affinity to the Lemurine 

 animals, and especially to the African forms. The whole skull, 

 however, is more depressed than in the slow Lemurs and 

 Galagos; the orbits are smaller, the brain cavity relatively 

 smaller and more constricted behind the orbits, and the mus- 

 cular ridges more developed." . . The lower jaw is deep 

 and stout. The posterior upper pre-molar is very similar to a 

 true molar. "The upper molar teeth are nearly equal in size, 

 and have nearly square crowns, with four distinct cusps, one 

 at each angle, rather obliquely placed " ; the hind inner cusp 



