TUPAIID^. 123 



surface of tlie carpus markedly concave. The phalanges are of moderate length and 

 cylindrical. 



The pelvis is remarkably distinct from the pelvis of Sylomys, Crocidura^ or 

 Talpa, and approaches more to the pelvis of Erinaceus. 



The ilium is rather narrowly expanded, concave externally, with a nearly 

 straight supra-iliac border. The sacral surface of the bone is rather small, and the 

 bone rises above the sacrum, bending upwards, forwards, and outwards, the inner 

 surface being nearly flat. The iliac border is rather broad, especially near the aceta- 

 bulum, owing to the development of a pre-acetabular process. The pubic border is 

 very sharp. The thyroid foramen is very large and a short oval, and the 

 posterior margin of the ischium rounds off forwards and inwards from the 

 tuberosity, which does not project as a distinct process. In two skeletons before 

 me, and both of which have adult dentition, but with the epiphyses of the inferior 

 articular extremity of the femur distinct, the symphyses of the sacrum are not 

 united. 



The femur is a long bone with the 3rd trochanter forming a rather elon- 

 gately triangular, prominent, thin plate of bone more or less concave on its two 

 sides. The internal trochanter forms a well-marked process, and the digital fossa 

 is small, triangular, but deep. 



The tibia and fibula are quite distinct, and only come in contact with each 

 other at their extremities. 



The calcaneum is narrow and laterally compressed in its posterior half, and 

 broad anteriorly. The under sm^face is nearly fiat in the middle line, but slopes off 

 at the sides. The sustentaculum tali forms a very prominent process projecting'' 

 inwards nearly at right angles to the bone. The tubercle for the attachment 

 of the calcaneo- cuboid ligaments forms a distinct minute process external, anterior, 

 and immediately below the sustentaculum tali. 



The astragalus presents no features worthy of special remark. The cuboid 

 bone has the form of a very much shortened metatarsal, broadest in its posterior 

 and suddenly narrowing to its anterior half, which is shortly cylindrical and 

 is deeply grooved beneath for the tendon of the peroneus longus. The short and 

 broad scaphoid presents a rather rounded eminence above, and the tubercle for 

 the tibialis posticus muscle is well developed. The internal cuneiform is broadest 

 from above downwards, narrow and rather pointed behind for articulation with 

 the scaphoid, being laterally compressed from without inwards. The second 

 cuneiform is laterally compressed, and presents a dorsal concave surface which 

 looks inwards and upwards. The third is shortly cylindrical and rather deeply 

 grooved below. The metatarsal bones are long and slender, the second and fourth 

 bemg nearly of equal length, and the third very slightly longer than the other 

 two ; the first and fifth are nearly equal, the latter, however, being the lar(>er. 

 The proxnnal process of the fifth forms a hook, which projects backwards and 

 outwards. 



