CASSIOPEA XAMACHANA. 



233 



'84. Znr Metamorphose der Rhizostomen. Zool. Anz., Jahrg. 7, 1884, p. 429. 



'88. Die australischen rhizostninen Medusen. Zeitsclir. f. wi.sg. Zool., vol. 47, 1888, p. 201. 

 McMurrich, J. P. 



'91. The Development of Cyanea arctica. Amer. nat., vol. 25, 1891, p. 287. 

 Metschnikoff, E. 



'86. Embryologische Studien an Medusen. Wien, 1880. 

 Milne-Edwards, H. 



'49. Les zoophytes. Cuvier, Regne animal illustrfi. Vol. 10, 1849, pi. 51. 

 Reid, J. 



'48. Observations on the development of the medusae. Annals and mag. nat. hist., ser. 2, vol. 1, 1848, p. 25. 

 Sars, M. 



'41. Ueber die Entwicklung der Medusa aureta und Cyanea capillata. Arch. f. Naturg., vol. 7, 1841, p. 9. 

 Schewiakoff, W. 



'89. Beitrage zur Kenntnis der Acalephenauges. Morph. Jahrb., vol. 15, 1889, p. 25. 

 Schneider, A. 



'70. Zur Entwicklimgsgesehichte der Aurelia aurita. Arch, f. mik. Anat. vol. 6, 1870, p. 363. 

 Schultze, L. S. 



'98. Rhizostomen von Ternate. Abh. senckenb. naturf. Ges., vol. 24, 1898, p. 153. [Occurrence of Cassiopea, sp.?] 

 Smith, Frank. 



'91. The gastrulation of Aurelia flavidula P^r. & Les. Bull. mus. comp. zool., vol. 22, no. 2, 1891. 

 Tilesins, W. G. v. 



'29. Zur Naturgeschichte der Medusen. Nova Acta Physico-Medica, N. C., vol. 15, 1829, p. 266. 

 Vanhoffen, E. 



'88. Untersuchungen iiber semaeostome und rhizostome Medusen. Leuckart & Chun's Biblioth. Zool., Heft 3, 1888. 



EXPLANATION OF PLATES. 



All the figures from I to 28, and Figs. 34 and 35, are freehand drawings made from the living animals. Figs. 29 to 

 33 are from well-preserved specimens mounted in balsam, and were outlined with the camera lucida. The remaining figures, 

 except Fig. 37, are camera-lncida drawings of microtome sections. All the figures are reduced uniformly to slightly less 

 than one half the diameter of the original drawings. 



LETTERING COMMON TO ALL THE FIGURES. 



b. bud. 



c. columella. 



c d. circum-oral disc, or peristome. 



cs. circular sinus. 



ex. calyx. 



d. digitellum. 



ect. ectoderm. 



e 1. endodermal lamella, or cathammal plate. 



end. endoderm. 



e u. exumbrella. 



g. stomach. 



g f . gastric filament. 



g p. gastric pouch. 



h. hood. 



i 1. interrhopalial lobe. 



i t. interrhopalial tentacle. 



1 g. labial groove. 



m. mouth. 



mes. mesogloea, or supporting membrane. 



n f. nerve fibres. 



o a. oral arm. 



oc. ocellus. 



o d. oral disc. 



oe. oesophagus. 



