174 Part II1.—Twenty-first Annual Report 
winter, z.e. before it was two years old. They had been reared from the 
size of 2°5 and 6mm. respectively. Neither had during its captivity 
been in contact with the male crab. The eggs did not become properly 
attached to the swimmerets: they were all thrown off within a month 
of extrusion. 
ABSORPTION AREA ON CHELA. 
A part of the shell of the coxopodite of the chela becomes decalcified 
at the time of casting, a soft area similar to that found in the lobster at 
that time, appearing in the crab also. This is regarded by Herrick as 
an arrangement necessary for permitting the withdrawal of the chela 
from its shell. 
Dr. Hansen, Copenhagen, and Dr. Calman, British Museum, have 
kindly assisted me with references to literature. 
LITERATURE. 
Bouvier, E. L.—‘ Sur le developpement embryonnaire des Galatheides du genre 
Diptychus.” Comptes Rendus Acad. Sci, cxiv, 1892, p. 767. 
Brook.—‘‘ On the Rate of Development of the Common Shore Crab (Carcinus 
menas),’ Annals and Magazine of Natural History (V.), vol. xiv., 1884, 
p. 202. 
Catman.—‘‘ On the Genus Anaspides and its Affinities with certain Fossil Crus- 
tacea.” Trans. Roy. Socy. Hdin., vol. xxxviii., pl. iv. 
Cano.—‘‘ Morfologia dell’apparecchio sessuale feminile, glandole del cemento e 
fecondazione nei Crostacei Decapodi,” Mittheil. a. d. Zool. Stat. Neapel, 
ix Bd., 4 Hft., 1890. 
Craus.—‘‘ Neue Beitriige z. Morphol. d. Crustaceen.” Arb. a. d. Zool. Inst. 
Wien, vi., 1886, p. 44. 
Criaus.—‘‘Zur Kenntniss der Malakostrakenlarven,” Wurzbuwrger Naturwissen. 
Zeitschrift, 2 Bd., 1861, p. 23. 
Coucu, R. Q.—‘‘On the Metamorphosis of the Decapod Crustaceans,” Hleventh 
Annual Report of the Royal Cornwall Polytechnic Society, Falmouth, 1843, 
1 pl. 
CUNNINGHAM.—‘‘ On the early Post-larval stages of the Common Crab (Cancer 
pagurus), and on the Affinity of that Species with Atelecyclus heterodon. 
Proc. Zool. Socy. Lond., March, 1898, 1 pl., p. 204. 
Du Canu.—-‘‘On the Metamorphosis of the Crustacea,” Annals of Natural 
History, vol. iii., 1839, 1 pl. 
Faxon.—‘‘ On some points in the Structure of the Embryonic Zoéa,” Bull. Mus. 
Compar. Zool., Harvard, vol. vi., No. 10, 2 pl., p. 159. 
L&on FrepEerice.—‘‘ Nouvelles Recherches sur l’Autotomie chez les Crabe,” 1891. 
—‘*L’Autotomie ou la Mutilation active dans le régne animal,” 
Bull. de V Acad. roy. de Belgique, 3e. Sér., t. xxvi., No. 12, pp. 758-772, 
1893. 
GurNry.—‘‘The Metamorphosis of Corystes cassivelaunus (Pennant),” The 
Quarterly Journal of Microscopical Science, vol. 46, N.S. 
HansEen.—‘‘ A Contribution to the Morphology of the Limbs and Mouth-parts of 
Crustaceans and Insects,” The Annals and Magazine of Natural History 
(VI.), vol. 12, 1893, p. 417. 
HeEnNsEN.—‘Studien iiber das Gehérorgan der Decapoden,” Zeitschr. f. wissenschaft. 
Zoologie, 13 Bd., p. 319, 1863, 4 Taf. 
Herrick.—‘‘ The American Lobster.” Bull. U.S. Fish Commission for 1895, 
Washington, 1895. 
Howes.—OPENING ApDDREsS to the Section of ZooLocy.— Meeting of the British 
Association, Belfast, 1902. Nature, vol. 66, 1902, p. 527. 
Huxtury.—‘‘ The Crayfish—An Introduction to the Study of Zoology.” London, 
1880. 
KorscHELt AND HeEtpEr.—‘‘Text-book of the Embryology of Invertebrates.’ 
London, 1899. 
