32 THE EEPTILES OF EGYPT. 
TRIONYCHID^. 
TRIONYX. 
Trionyx, part., Geoffr. St.-Hil. Ann. Mus. xiv. 1809, p. 1. 
Trionyx triunguis, Forskal. (Plate III.) 
Le Trionyx d'fiyypte, Geoffroy St.-Hil. Descr. de l'Egypte, Hist. Nat. i. ? 1827, pp. 115-120, 
pi. i., et ed. 8vo (Panchouke), 1829, xxiv. Hist. Nat. vi. pp. 1-13, pi. i. 
Testudo triunguis, Forskal, Descr. An. 1775, p. ix. 
Trionyx niloticus, Gray, Syn. Rept. 1831, p. 46 ; Riippell, Mus. Senck. iii. 1845, p. 298 ; Gray, 
Cat. Sh. Rept. i. 1855, p. 68, skull, pi. xlii. tigs. 2«-2 d. 
Trionyx negyptiacus, Geoffr. Ann. Mus. xiv. 1809, p. 12, pis. i. & ii. ; Merrem, Syst. Amph. 1820, 
p. 20; Peters, Mon. Berl. Ak. 1862, p. 271; Straucb, Mem. Ac. St. Petersb. (vii. ser.) v. 1862, 
p. 175; id. op. cit. (vii. ser.) viii. 13, 1865, p. 126; Boettger, Ber. Senck. nat. Ges. 1879-80, 
1880, p. 208 ; Tristram, West. Palestine, Rept. & Batr. 1884, p. 157. 
Gymnopus agyptiacus, Dum. & Bibr. ii. 1835, p. 484. 
Trionyx labiatus, Bell, Test. 1837, pis. 18, 19, 20. 
T>/rse nilotica, Gray, Cat. Tort. 1844, p. 48; Proc. Zool. Soc. 1864, p. 88; Petherick's Travels 
Cent. Afr. ii. 1869, Append, p. 189; Suppl. Cat. Sh. Rept. i. 1870, p. 108; Ann. & Mag. 
N. H. (4) xi. 1873, p. 470. 
Trionyx mortoni, Hallow. Proc. Ac. Philad. ii. (1844) p. 120. 
Aspidonectes aspilus, Cope, Proc. Ac. Philad. 1859, p. 295. 
Fordia africana,G<:ay, Proc. Zool. Soc. 1869, p. 219; Petherick's Travels Cent. Afr. ii. 1869, Append. 
p. 190; Suppl. Cat. Sh. Rept. i. 1870, p. 100; Proc. Zool. Soc. 1873, p. 43, figs. 1 a-l d. 
Trionyx triunguis, Peters, Mon. Berl. Ak. 1876, p. 117; Blgr. Cat. Chelon. &c. 1889, p. 254 ; 
Anderson, Herpet. of Arabia & Egypt, 1896, p. 95; Blgr. Ann. Mus. Civ. Gen. ser. 2, xvii. 
(xxxvii.) 1896, p. 16 ; id. op. cit. p. 277. 
1 ? . Nile at Cairo. Dr. Walter limes. 
1 ? juv. Philae. 
1 ? juv. Wadi Haifa. Major Henry d' Alton Harkness. 
Carapace moderately convex, more or less depressed in the mesial line. Proboscis 
equalling the length of the eye. Upper labial folds and nuchal flaps well developed, 
the latter with rounded tubercles. Skin of the upper surface of the shell covered with 
tubercles arranged more or less in longitudinal wavy lines, most apparent in the young. 
Plastron with two pairs of callosities well developed in the adult and more or less 
rugose. Claws strong and pointed. Upper surface olive or olive-brown, profusely 
spotted with white dots with dark margins, well marked in the young and in half-grown 
