CASSIOPEA XAMACITANA. 



233 



'84. Zur Metamorphose der Rhizostomen. Zool. Auz., Jah'rg. 7, 1884. p. 429. 



'88. Die austialisclieu rliizo-stomeu Meduseii. Zeitsclir. f. wiss. Zool., vol. 47, I.S88, p. 201. 

 McMurrieh, 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 illustre. Vol. Ki, 1840, pi. 61. 

 Reid, J. 



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

 Sars, M. 



'41. Ueber die Entwickluiig der Medusa aureta und Cyanea capillata. Areh. f. Naturg., vol. V, 1841, p. 9. 

 Schewiakoff, W. 



'89. Beitriige zur Kenntnis der Aoalephenauges. Morph. Jahrb., vol. 1.5, 1889, p. 25. 

 Schneider, A. 



'70. Zur Entwickhingsgeschichte der Aurelia aurita. Arch, f. mik. An.at. vol. fi. 1870, p. 363. 

 Schultze, L. S. 



'98. Rhizostomen von Ternate. Abli. seuckeub. naturf. Ges., vol. 24, 1898, p. 153. [Oocurreuce of Vasskipea, sp.?] 

 Smith, Frank. 



'91. The gastrulation of Aurelia davidula Viw & Les. Bull. mas. comp. zool., vol. 22, un. 2, 1891. 

 Tilesius, W. G. v. 



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

 Vanhoffen, E. 



'88. Untersuchungen iilier semaeostonie und rhizostome Medusen. Leuckart & Chun's Biblioth. Zool,, Ileft 3, 1888. 



Explanation of Plates. 



All the figures from 1 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-lucida 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 di.sc, or iieristome. 



OS. — circular sinus. 



ex. — calyx. 



d. — digitellura. 



ect. — ectoderm. 



6 1. — endodermal lamella, or cathannnal plate. 



end. — endoderm. 



e u. — exmnbrella. 



g. — stomach. ' 



g f. — gastric filament. 



.g p. — ga.stric pouch. 



h. — hood. 



i 1. — interrhopalial lobe. 



i t. — interrhopalial tentacle. 



1 g. — labial groove. 



m. — mouth. 



mes. — mesogloea, or supjiorting membrane. 



n f. — nerve fibres. 



o a. — oral arm. 



oc. — ocellas. 



o d. — oral disc. 



oe. — oesophagus. 



