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Show 168 DR. J. E. GRAY ON THE TORTOISES. [Mar. 11, The hinder part of the skull over and near the ethmoid bones varies considerably, and affords very good characters for the distinction of the species. 1. T E S T U D O INDICA, Gray. Testudo indica, (skull figured) Cuvier Oss. Foss. v. t. f. ; copied, Wagler, N. Syst. Amph. t. 6. f. 51, 52, 53; Gray, Cat. Shield Reptiles in B. M. t. 35. fig. 1. T. elephantopus, Owen, Cat. Osteol. Mus. Col. Surg. p. 194. no. 1011 (skeleton), 1058 (skull). Skull-length 5f inches, width at zygomatic condyles 4|; the alveolar plate in the upper jaw broad, with a central and marginal ridge, and a groove in the lower jaw, the whole length of the margin. There is a skeleton of a small adult specimen of this species in the British Museum. 2. TESTUDO PLANICEPS. T. planiceps, (skull figured) Gray, Cat. Shield Reptiles in B. M. t. 34. Skull-length b\ inches, width over zygomatic arches 4\ ; the alveolar plate in the upper jaw narrower, with a central and marginal ridge, and a groove in the lower jaw, the whole length of the margin. 3. TESTUDO TABULATA. T. tabulata, (skeleton) Wiedemann, Arch. Zool. ii. 181 ; Wagler, N. Syst. Amph. t. 6. f. 1-6; Owen, Cat. Osteol. Mus. Coll. Surg. ]>. 200. no. 1044 (skeleton with mutilated skull), 1046 (skull?). Var. Testudo boiei, Wagler, N. Syst. Amph. t. 6. f. 7-13. Junior 1 T. denticulata, Owen, Cat. Osteol. Mus. Coll. Surg. p. 201. no. 1045 (skull); not Green. The upper jaw with a high triangular ridge, and the lower with a deep triangular groove with a very high inner edge, parallel to and nearly as long as the short-edged outer margin, only represented in the front of the upper jaw by the broad, deep, central, anterior pit. The upper jaw with a notch on each side of the centre, and the lower with a broad, compressed, conical projection. Palate very deep nearly the whole length, deeper on each side in front, with three laminar ridges, the middle one being the most distinct. The ethmoid bones smooth, without any distinctly raised ridge on each side. There are a skeleton and two skulls appearing to belong to this species in the British Museum. Length of the skull of the skeleton, from nose to condyle, 2^ inches ; width at zygomatic arches lf^ inch. Length of largest separate skull 2 inches 5 lines, width 1| inch. There is also in the Museum the skeleton of a small but adult specimen of the variety, with very deeply sulcated shields. They differ from each other somewhat in the depth, and slightly in the form of the concavity in the palate, and in the strength of the margin on |