68 Proceedings of the Royal Society of Edinburgh. [Sess. 
(3) Ligiee that have fasted for many weeks in sea- water may still 
moult normally. It follows that onset of the moult is determined by an 
underlying cyclic change, not as Reaumur suggested by simple growth of 
the animal. A second moult during the period of fast was not observed. 
REFERENCES TO LITERATURE. 
Allee, W. C., Jour . Exper. Zool ., vol. xv, 1913, pp. 283-289. 
Aubin, P. A., Journ. Econ. Biol., vol. ix, 1914, pp. 15-20. 
Calman, W. T., “ Crustacea,” Lankester’s Treatise on Zoology, pt. vii, 3rd fasc., 
1909, pp. 202, 203. 
Friedrich, H., Ztschr. f. Naturw., Halle, vol. lvi, 1883, pp. 468, 469. 
Hanko, B., Arch. f. Entw.-Mech., vol. xxxiv, 1912, p. 479. 
Hansen, H. J., Ann. Mag. Nat. Hist., 6th ser., vol. xii, 1893, p. 424. 
Herold, W., Zool. Jahrh., Abt. f. Anat. u. Ontog., vol. xxxv, 1913, pp. 446-481. 
Leichmann, G., Biblioth. Zool., Heft 10, 1881, passim. 
Lockwood, Amer. Nat., vol. iv, 1870-71, p. 261. (Ref. fr. Shipley, Camb. Nat. 
Hist., vol. iv, p. 275.) 
Nemec, B., Sitzb. d. Bohm. G-es. d. Wiss., math.-nat. Cl., Nr. 45. 1895, p. 38. 
Paul, J. H., and Sharpe, J. S., Jour. Physiol., vol. 1, 1916, p. 181. 
Pierce, U.S. Dept. Agric ., Bur. of Entom., Bull. No. 64, pt. ii, 1907, pp. 15-22. 
(Ref. from W. E. Collinge, Scottish Naturalist, Oct. 1915, p. 302.) 
Potts, F. A., Quart. Jour. Micr. Sc., vol. 1, 1906, p. 599. 
Reaumur, R. A. F. de, Hist. ( = Mem.) de V Acad. Roy. des Sc., 1712, pp. 223-241 ; 
ibid., 1718, pp. 263-274, esp. p. 271. 
Robson, G., Quart. Jour. Micr. Sc., vol. lvii, 1912, p. 267. 
Schobl, J., Arch. f. mikr. Anat., vol. xvii, 1880, pp. 131, 132. 
Schonichen, W., Ztschr. f. iviss. Zool., vol. lxv, 1898, pp. 169, 170. 
Sexton, E. W., and Matthews, A.., Jour. Mar. Biol. Ass., vol. ix, No. 4, 1913, p. 546. 
Smith, G., Quart. Jour. Micr. Sc., vol. lvii, 1912, pp. 251-265; ibid., vol lix, 
1913, pp. 267-295. 
Tait, J., Proc. Physiol. Soc., p. xl, Jour. Physiol., vol. xl, 1910. 
Tait, J., Jour. Mar. Biol. Ass., vol. ix, No. 2, 1911, p. 195. 
Tait, J., Proc. Roy. Soc. Edin., vol. xxxvii, 1917, pp. 50-58. 
Verhoeff, K. W., Berlin. Entomol. Ztschr., vol. xlvi, 1901, pp. 19, 20. 
Webb, W. M., and Sillem, C., The British Woodlice, London, 1906, pp. 13, 14. 
Weber, M., Arch.f. mikr. Anat., vol. xix, 1881, pp. 598, 599. 
Wege, W., Zool. Jahrb., Abt. f. ally. Zool. u. Physiol ., vol. xxx, 1911, 
pp. 270-274. 
Zuelzer, M., Arch. f. Enttc.-Mech., vol. xxv, 1907, pp. 263 If. 
( Issued separately April 13 , 1917 .) 
