8 E. W. MacBRIDE. 
LIST OF WORKS REFERRED TO IN Pror. E. W. MacBRIDE’S REPORT 
ON A COLLECTION OF YOUNG HOLOTHURIOIDS. 
(1) Bury, H. The Metamorphoses of Echinoderms. Q. J. Mier. Sci. Vol. 38 (1895). 
(2) Cuun. Atlantis. Biologische Studien iiber pelagische Organismen. Bibliotheca Zoologica. Heft 19 
(1896). 
(3) Lupwie, H. Echinodermen in Bronn’s Klassen und Ordnungen des Thierreichs. Bd. m., Abt. 3, 
Buch 1. Die Seewalzen. 1889-1892. 
(4) Lupwie, H. Zur Entwickelungsgeschichte der Holothurien. Sitzungsber. d. Berliner Akad. d. 
Wissensch., 1891. 
(5) MacBrion, E. W. The development of Eehinus esculentus, together with some points in the 
development of #. milaris and EB. aculus. Phil. Trans. of the Royal Society. Vol. 95 (1903). 
(6) MacBripr, E. W., and Smpson, J. A. Report on the Hchinoderm larvee of the National 
Antarctic Expedition. Vol. 1v. (1908). 
(7) Mrrsuxurr, K. Notes on the habits and life-history of Stichopus Japonicus : Annotationes Zoologicae 
Japonenses. Vol. v., Part 1. (1903). 
(8) Morrensen, TH. Die Echinodermenlarven der Plankton-Expedition, etc, Ergebnisse der Plankton- 
Expedition der Humboldt-Stiftung. Vol. m. J. (1898). 
DESCRIPTION OF PLATES I. anp II, 
ILLUSTRATING Pror. E. W. MacBRIDES REPORT ON A COLLECTION 
. OF YOUNG HOLOTHURIOIDS. 
LIST OF ABBREVIATIONS. 
U2. Axial sinus. @S., Césophagus. 
circ. W, Water ring Or sy Oral pocket into which one of the 
C00, Coelom. buccal tentacles is retracted. 
av., Dorsal blood-vessel. ped. gang., Pedal ganglion. 
Cs Epineural canal. perth., Perihzemal canal. 
Ober Problematical interradial group of cells | pod. ect., The ectodermal disc of a tube-foot 
resembling a young gonad. forming in its retracted state a cup. 
g.b. Genital base. pod. end., The endodermal canal of a tube-foot. 
gon. Gonad. Pol., Polian vesicle. 
int., Intestine. | pul., Rudiment of pulmonary trees. 
mad. Rudimental internal madreporite. rect. Rectum. 
muse. circ., Circular muscles of cesophagus. r.W., Radial water-vascular canal. 
musc.rad., Radial muscle. | ie Oo, Stone-canal. 
nerv. circ., Nerve-ring. | stom. Stomach. 
nerv. rad., Radial nerve. 
