4682 THE ZooLocist—NoveEMBER, 1875. 
now in the British Museum, whilst for others, from the district of 
Flacq, I am indebted to M. Bouton, has convinced me of a mullti- 
plicity of species in this island. The majority of the bones were 
found near Mahe’bourg, in a ravine of no great depth or steepness, 
which apparently once conveyed to the sea the drainings of a con- 
siderable extent of circumjacent land, but which has been stopped 
to seaward, most likely for ages, by an accumulation of land. The 
outlet from this ravine having thus been stopped, a bog was formed 
called “‘ La Mare aux Songes,” with an alluvial deposit varying in 
depth from three to twelve feet. The tortoise bones occur ata 
depth of three or four feet, imbedded in a black vegetable mould ; 
lighter coloured specimens are from the vicinity of the springs. 
(Zool. Trans. vi. p. 51). Among these bones I have distinguished 
four species, the more important characteristics of which may be 
particularized as follows :— 
1. Testudo triserrata.—Promixal half of the scapula trihedral, 
with the anterior side convex ; acromium trihedral, straight. Cora- 
coid anchylosed to scapula at an early stage of growth. Humerus 
moderately slender, with the shaft flattened, and a deep hollow 
between the head and tuberosities. Shaft of the ulna narrow, 
much twisted. Ossa ilei short and broad; transverse and vertical 
diameters of pelvis subequal; front part of pubic bones abruptly 
bent downwards. Femur stout, with much dilated condyles; a 
deep and broad cavity between the head and trochanters. 
2. Testudo inepta.— Proximal half of the scapula trihedral, with 
the anterior side concave; acromium compressed, with the end 
curved. Coracoid never anchylosed to the scapula. Humerus 
moderately slender, with the upper half of the shaft trihedral, and 
without hollow behind the head. Shaft of the ulna broad, not 
much twisted. Ossa ilei narrow and long; vertical diameter of 
pelvis much exceeding in length the horizontal; front part of 
pubic bones gently declivous. Femur stout, with much dilated 
condyles, and with a deep and narrow cavity between the head 
and trochanters. 
3. T'estudo leptocnemis.—Sparsely represented, with a scapulary 
similar to that of T. triserrata; ossa ilei of moderate length and 
width; femur slender, with moderately dilated condyles, and with 
a deep and broad cavity between the head and trochanters. 
4. Testudo Boutonii.—Known from scapulary and humerus only. 
The former bone is strongly compressed ; acromium with the end 
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