CHELONIA. Iiept. 7 
Remarks on this paper by R. Lydekker, Geol. Mag. (3) iii, pp. 522 
& 523. 
Mitsukuri, K., & Isiiikawa, C. On the Formation of the Germinal 
Layers in Chelonia. Q. J. Micr. Sci. xxvii, pp. 17-48, pis. ii-v. 
Researches made in Japan on Trionyx japonicus. 
Pilliet, A. Sur les plaques osseuses dermiques des Tortues et des 
Tatous, et sur l’ossification par la moelle des os en g^ndral. Bull. 
Soc. Z. Fr. xi, pp. 623-651. 
Gadow, H. On the Reproduction of the Carapax in Tortoises. J. 
Anat. Phys. xx, pp. 220-224, pi. vi. 
The author has made the remarkable discovery that Land Tortoises 
are able to reproduce portions of their bony shell. From the healthy 
margins of the malphigian layer, the latter grows ceutripetally towards 
the injured area, right into the osseus plate, and thus causes its partial 
destruction. The superimposed shell and osseus plates, to the extent of 
the area to be mended, are cast off. Lastly, the remaining deep portions 
of the dermis make up for the loss by thickening. 
G. Baur has notes on the osteology of Ohelydra. The caudal vertebras 
are not all opisthocoelous ; the two or three first are proccelous, the next 
one amphicoelous. Two ossa centralia carpi are present. Zool. Anz. ix, 
pp. 740-742. 
L. Vaillant, Bull. Soc. Philom. (7) x, pp. 135-138, has a note on the 
disposition of the digestive tract in the herbivorous Chelonians. 
Gage, S. H., & S. P. Aquatic Respiration in Soft-shelled Turtles : a 
Contribution to the Physiology of Respiration in Vertebrates. Am. 
Nat. xx, pp. 233-236. 
It has been observed that in the Anjerican Trionyx the lungs are not 
the only respiratory organs. The mucous membrane of the pharynx is 
closely beset with filamentous processes, copiously supplied with blood, 
which have been assumed to have the function of the internal gills of 
Tadpoles. That such is really the case is demonstrated by the authors’ 
experiments. 
G. Roue i r has a paper on the mechanism of respiration in the Marine 
Turtles ; Bull. Soc. Z. Fr. xi, pp. 461-470. 
Mills, T. W. The Rhythm and Innervation of the Heart of the Sea- 
Turtle. J. Anat. Phys. xxi, pp. 1-20, pi. i. 
. Notes on the Urine of the Tortoise, with special reference to Uric 
Acid and Urea. J. Physiol, vii, pp. 453-457. 
List, J. H. Zur Kenntniss des Blasenepithels einiger Schildkroten 
( Testuclo grceca uud Emys europcca). Arch. mikr. Anat. xxviii, 
pp. 416-421, pi. xxvi. 
J. Sciineck, Am. Nat. xx, p. 897, remarks on the slow growth of 
Tortoises, and records the case of a Cistudo Carolina known alive for 
more than 60 years. 
E. A. Goldi gives an abstract from a Portuguese MS., by J. M. da 
