358 EDITH M. PRATT. 
1901. Hickson, S. J.—‘*Aleyonium,” ‘ Liverpool Marine Biol. Committee,’ 
London. 
1902. Prarr, Epirx M.—‘“ Mesogleal Cells of Aleyonium digitatum” 
(Preliminary account), Zool. Anz.,’ July, 1902. 
1902. Garpiner, J. Stantey.—“ Flabellum, Anatomy and Development,” 
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1902. Durrpin, J. E.—** West Indian Madreporarian Polyps,” ‘ Nat. Acad. 
of Sci.,? Washington, 1902. 
1902. Mesniz, M.—‘‘ Digestion chez ies Actinies,’ ‘Ann. de I'lnstitut 
Pasteur.’ 
1903. Pratt, Epirn M.—‘ The Assimilation and Distribution of Nutriment 
in Aleyonium digitatum” (preliminary account), ‘ Reports 
Brit. Assoc.,’ Section D. 
1903. Kasstanow, N.—‘‘ Ueber des Nervensystem der Alcyonarien,” ‘ Ber- 
gen’s Museums Aarbog.,’ 1903. 
1903. Gamse, F. W., and Krersiz, F.—‘The Bionomics of Convoluta 
roscoffeusis, with special reference to its green cells,” ‘Quart. 
Journ. Mie. Sci.,’ vol. 47. 
1903. Pratt, Epirn M.—‘ The Alcyonaria of the Maldives,” pt. ii, ‘Fauna 
and Geography of the Maldive and Laccadive Archipelagos,’ vol. ii, 
pt. i. 
1905. Prarr, Eprru M.—‘‘Some Alcyonide from Ceylon,” ‘Herdman Report 
Ceylon Pearl Oyster Fishery, Royal Society.’ 
EXPLANATION OF PLATES 20—22, 
Illustrating Edith M. Pratt’s paper, “The Digestive Organs 
of the Alcyonaria and their Relation to the Mesogleal 
Cell Plexus.” . 
List or REFERENCE LETTERS. 
Amb. c. Ameeboid cells. 6. cz. Batteries of cnidoblasts. car. p. Carmine 
particles. c.g.c. Clear gland cells. ch. Chromatophore. ez. Cnidoblast. 
cel. Celenteron. col. end. Columnar endoderm. c.v. Ciliated vessel. . z. 
Contracted zooids. d. mg. Dense layer of mesoglea surrounding zooids. 
d. mes. Dorsal mesentery. d.m./f. Dorsal mesenterial filament. ect. Ecto- 
derm. em.g.c. Empty gland cell. ezd. Endoderm. end. 6. w. Endoderm 
body wall. exd.can. Endodermal canals in mesoglea. ezd.co. Endodermal 
cords in mesoglea. /f.c. Flagellate cell. #.f Carmined fish food. f. a. Par- 
