E. w. MAG-BRIDE. 



LIST OF WORKS REFERRED TO IN PROF. E. W. MAcBRIDE'S REPORT 

 ON A COLLECTION OF YOUNG HOLOTHURIOIDS. 



(1) BURY, H. The Metamorphoses of Echinoderms. Q. J. Micr. Sci. Vol. 38 (1895). 



(2) CHUN. Atlantis. Biologischc Studien iiber pelagiache Organismen. Bibliotheca Zoologica. Heft 19 



(1896). 



(3) LunwiG, H. Echinodermen in Bronn's Klassen und Ordmmgen des Thicrreichs. Bel. n., Abt. 3, 



Buch 1. Die Seewalzen. 1889-1S92. 



(4) LUDWIG, H. Zur Entwickelungsgeschichte cler Holotlmrien. Sitzungsbcr. d. Berliner Akad. d. 



Wissensch., is<)l. 



(5) MACBRIDH, E. AV. The development of Echinus escidentus, together with some points in the 



development of E. milaris and E. acutm. Phil. Trans, of the Royal Society. Vol. 95 (1903). 



(6) MACBEIDE, E. W., and SIMPSON, J. A. Report on the Echinoderm larvae of the National 



Antarctic Expedition. Vol. iv. (1908). 



(7) MITSUKURI, K. Notes on the habits and life-history of Stichnpus Japonicus : Annotationes Zoologicae 



Japonenses. Vol. v., Part i. (1903). 



(8) MORTENSEN, TH. Die Echinodermenlarven der Plankton-Expedition, etc. Ergebnisse der Plankton- 



Expedition der Humboldt-Stiftung. Vol. II. J. (1898). 



DESCRIPTION OF PLATES I. AND II., 



ILLUSTRATING PROF. E. W. MAcBRIDE'S REPORT ON A COLLECTION 



OF YOUNG HOLOTHURIOIDS. 



LIST OF ABBREVIATIONS. 



ax., Axial sinus. 



circ. w. Water ring 



coe., Coelom. 



d.v ., Dorsal blood-vessel. 



fp., Epineural canal. 



g. ?, Problematical interradial group of cells 



resembling a young gonad. 



ff.b. Genital base. 



gon. Gonad. 



int., Intestine. 



mad. Rudiments] internal madreporite. 



muse, circ., Circular muscles of oesophagus. 



muse, rad,, Radial muscle. 



nerv. circ., Nerve-ring. 



nerv. rad., Radial nerve. 



ass., Oesophagus. 



or., Oral pocket into which one of the 



buccal tentacles is retracted. 

 ped. gang., Pedal ganglion. 



perih., Perihajinal canal. 



pod. ect., The ectodermal disc of a tube-foot 



forming in its retracted state a cup. 



pod. end., The endodermal canal of a tube-foot. 



Pol., Polian vesicle. 



pul., Rudiment of pulmonary trees. 



reel. Rectum. 



r.w., Radial water-vascular canal. 



st. c., Stone-canal. 



stom. Stomach. 



