A. LEITH ADAMS ON MALTESE LAND-TORTOISES. 



181 



mens of T. elephantopus and T. vicina, gives the following data. Tho 

 loss of the precoracoid somewhat vitiates the determination as to the 

 angle formed by the union of the scapula and that bone. It would 

 appear, however, to have been more obtuse than in either of the 

 above-named recent species. As to available dimensions : — 





03 



1 



8 



•If 



Eh 



S3 

 8 



.8 



Em 



•00 



Sh 1 



Maximum breadth at the glenoid cavity 



Girth at the middle of the shaft 



millim. 



77 



75 



50 



millim. 



77 



75 

 55 



millim. 

 73 



70 



45 







Humerus. 



The proximal extremity of a right humerus from Zebbug (Plate 

 VI. figs. 6, 6 a) is the only specimen of that bone in the collections. 

 It was picked up by me among the debris of the Zebbug rock- 

 cavity several years subsequent to Admiral Spratt's explorations. 

 This humerus evidently belonged to a rather smaller individual than 

 the owner of the femur (PI. 71. figs. 5, 5 a, 5 6), and to a tortoise about 

 the size of Lutremys europcea, with whose femur it agrees closely in 

 characters and dimensions. The large tuberosity diverging from the 

 head expands and rises considerably above the latter, whilst the 

 smaller tuberosity is nearly on the same level with the head. The 

 intervening pit is deep and broad. The head is elliptical, and 

 measures 11 millimetres along its curve, and has a deep pit 

 under it. The least girth of the shaft is 13 millimetres. On the 

 radial side of the head at b, fig. 6, is a groove with a sharp outer 

 margin. 



As compared with Lutremys europcea these characters are abso- 

 lutely identical. In T. grceca the great tuberosity is not nearly so 

 much expanded, and the groove b (fig. 6) is wanting ; the shaft, 

 also, is stouter, and there is no pit under the head. Considering 

 that the affinities with Lutremys europcea are also confirmed by 

 the femur (fig. 5), I do not, in the absence of further data, deem it 

 necessary to separate the fossil from this recent freshwater species, 

 an adult specimen of which in the British Museum has a humerus 

 of 44 millimetres and a carapace of 210 millimetres. This tortoise 

 is still found in the lakes and muddy waters of Sardinia, Italy, and 

 elsewhere in Southern and South-eastern Europe, 



