TESTUDO DAUDINII. 
33 
rise to the level of the summits of the trochanters, from which it is separated by a 
broad and deep cavity. The larger trochanter (a) rises to a higher level than the lesser 
(b), from which it is separated by a shallow incision. A deeper but narrow depression in 
the outer margins marks the boundary between the trochanters and the head. The 
lateral portions of the body of the bone below the trochanters show scarcely any im- 
pression. The length of the femur of our largest example (e) is 250 millims., with a 
least circumference of 128 millims. ; the width of the condyles is 120 millims. 
Of the lower leg smdfoot no part deserves to be mentioned particularly. The astra- 
galus and calcaneum appear to coalesce at an early stage of growth. And it would 
appear that in almost all the Round-headed Tortoises the fibula is nearly equal to or even 
exceeds the tibia in length (see table of measurements, p. 39), whilst in the Galapagos 
Tortoises the tibia is considerably longer than the fibula. 
2. TeSTUDO DAUDINII. 
This name was given by Dumeril and Bibron (Erpet. Gen. ii. p. 123) to a 
skeleton (with carapace) in the Paris Museum Avhich seems to agree closely with the 
example in the British Museum ; it surpasses the latter in size, being 99^ centims. (or 
39J in.) long, and is stated to have come from the " East Indies ;" probably it came on 
board a vessel returning from the Indian Ocean. 
This species is distinguished by the very peculiar form of its carapace, and in this 
respect as well characterized as Testudo e'phippiimi from the Galapagos Islands. I have 
before me two examples, of which one is an adult male (Plate V.), stuffed, in the 
British Museum, the carapace being 34| in. long. The second is a half-grown stuffed 
male, with a carapace 23 in. long, and belongs to the Free Public Museum, Liverpool. 
Fortunately the skulls of both specimens could be extracted ; but the remainder of the 
skeleton is lost. Nothing whatever is known of the history of these specimens ; and as 
no example has reached Europe for a long period, this species may be regarded as pro- 
bably extinct. 
The carapace (Plate V.) is narrow, oblong, and rather deep, not much broader behind 
than in front ; its upper profile from the nuchal plate to the fourth vertebral is nearly 
horizontalal, though slightly undulating ; but there is scarcely any downward inclination 
of the first vertebral plate towards the nuchal. A second very characteristic point is 
the strong reversion of the two anterior and the two posterior marginal plates. 
The caudal plate does not participate in the outward reversion of the marginals, but 
is rather bent inwards, so as to present a convex surface. The anterior and posterior 
margins are irregularly scalloped. The vertebral plates, as well as the costals, are 
perfectly smooth and polished, no trace of an areolar surface being visible ; but those of 
their margins which are in contact with the marginal plates are coarsely striated, as are 
also the marginal plates themselves. The nuchal plate is of considerable size, broader 
than long. Caudal plate divided into two unequal portions by an irregular eccentric 
