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H. BURY. 
LITERATURE. 
1. A. Agassiz. — “ Revision of the Echini,” Cambridge, U. S., 1872-74. 
2. A. Agassiz. — “North American Starfishes,” ‘Mem. Mus. Comp. Anat. 
and Zool.,’ Harvard, vol. v, No. 1, 1887. 
3. N. C. Apostolides. — “Anatomie et Developpement des Ophiures,” 
‘Arch. Zool. Exp. et Gen.,’ vol. x, p. 121, 1882. 
4. F. M. Balfour. — ‘ Treatise on Comparative Embryology,’ vol. i, London, 
1880. 
5. J. Barrois. — “ Becherches sur le Developpement de la Comatule (C. 
mediterranea),” ‘Recueil Zool. Suisse,’ vol. iv, No. 4, p. 546,1888. 
6. A. Baur. — ‘ Beitrage zur Naturgeschichte der Syn apt a digitata,’ 2te 
Abhand., Dresden, 1864. 
7. H. Bury. — “The Early Stages in the Development of Antedon 
rosacea,” ‘ Phil. Trans.,’ 1888, vol. 179. 
8. P. H. Carpenter. — “ Notes onEchinoderm Morphology,” No. V, ‘Quart. 
Journ. Micr. Sci.,’ vol. xxii, p. 371, 1882. 
9. J. W. Fewkes. — “Preliminary Observations on the Development of 
Ophiopholis and Echinarachnius,” ‘ Bull. Mus. Comp. Zool.,’ Harvard, 
vol. xiii, No. 4, p. 105, 1885-86. 
10. J. W. Fewkes. — “ On the Development of the Calcareous Plates of 
Amphiura,” ‘ Bull. Mus. Comp. Zool.,’ Harvard, vol. xiii, No. 4, 
* 1887. 
11. A. Gotte. — “ Yergleichende Entwicklungsgeschichte der Comatula 
mediterranea,” ‘Arch. f. Micros. Anat.,’ vol. xii, p. 583, 1876. 
12. M. M. Hartog. — “The True Nature of the Madreporic System of 
Echinodermata, with remarks on Nephridia,” ‘Ann. and Mag. Nat. 
Hist.,’ vol. xx, 5th ser., p. 321, 1887. 
13. A. Kowalevsky. — “ Entwicklungsgeschichte des Ampliioxus lanceo- 
latus,” ‘Mem. Acad. Imp. des Sciences de St. Petersbourg,’ series 
vii, vol. xi, 1867. 
14. H. Ludwig.— “Ueber den primaren Steinkaual der Crinoideen, nebst 
vergleichend-anatomischen Bemerkungen fiber die Echinodermen fiber- 
haupt,” ‘ Morph. Stud.,’ vol. ii, p. 34, Leipsic, 1880-82. (And ‘ Zeitsch. 
f. wiss. Zool.,’ vol. xxxiv, p. 310, 1880.) 
15. H. Ludwig. — “Neue Beitrage zur Anatomie der Ophiuren,” ‘Morph. 
Stud.,’ vol. ii, p. 57. (And ‘ Zeitsch. f. wiss. Zool.,’ vol. xxxiv, p 
333, 1880.) 
