CASSIOPEA XAMACHANA. 231 



for supposing tluit their latiT liistory is ditt'erent. At any rate, we have here the first 

 fairly complete liistory of tiie development of a scyphomedusa from the bud; and wlien 

 the sexual development of Cassioj^ea xamachana or an allied species is studied, this 

 memoir will serve as a means of comparison, and will make it possible to determine 

 whether or not the two modes of ontogeny are alike. 



Literature. 



Agassiz, A. 



'65. North American Acalephae. Illnsti-ated catalogue ni the Museum of comp. zool. at llarvanl College. No. 2, ISt)5, 



p. 41. 

 '81. Polyclouia troiidosa. Nature, vol. 24, 1881, p. 500. 

 Agassiz, A., & Mayer, A. G. 



"99. Acalephs from the Fiji Islands. Bull. mus. eumii. zool., vol. 32, uo. 9, 1809. (De.scriplion of Crtssto/zeil w/ro.sta.) 

 Agassiz, L. 



'60. Contributions to tlie natural history of the United States of America. Vols. 3 and 4. Bostiui, 1800. 

 Ai-cher, H. 



'81. Medusae. Nature, vol. 24, 1881. p. 307. 

 Berger, E. W. 



1900. Phy.siology and histology of the Cubomedusae, inrludiujf Dr. F. S. Conant's notes on physiology. Mem. Iiiol. 

 lab. Johns Hopkins Univ. vol. 4, no. 4. 

 Bigelow, U, P. 



'90. The marginal .seiLse organs in the Pelagidae. Johns Hopkins Univ. circ, vol. 9, 1890, no. ,80, p. 05. 



'92a. On reproduction by budding in the Discomedusae. J. H. U. circ, vol. 11, 1802, no. 97, p. 71. 



'92b. On the developmi-nt of the marginal .sen.se organs of a rhizo.stomatous medu.sa. .1. II. U. circ, vol. II, 1S02. 



no. 97, p. 84. 

 '92c. On a new species of Cassiopea from .lamaica. Zool. Anz., .lahrg. 1-5, 1892, no. 393, jip. 212-214. 

 '93. .Some observations on Polyclonia frondo.sa. .1. H. V. circ, vol. 12, 1893, no. l(p(i, p. KIO. 

 Brandt, J. F. 



'38. Ansfiirliche Beschreibnng der von C. II. Martens aid' .seiner Weltum.segelung lieoljarhteten Scliiruniuallen. Mem. 

 Acixl. imp. sei. St. Petersbourg, sci. math, pliys. et nat., (0) vol. 4 (pt. 2, sci. nat., vol. 2), I.S38, pp. 394-399. 

 Brooks, W. K. 



'86. The life history of Hydroniedusae. a di.scnssion of the origin ot medu.s.ae and the signilicance of metagenesi.s, 

 Mem. Boston soc. nat. hist., vol. 3, no. 12, 188(i ; also Mem. biol. lab. Johns Hopkins Univ., vol. 1. 

 Claus, C. 



'77. Studien iiber die Polypen und Quallen der Adria. Denk.sehr. d. matli.-naturw. Classe d. k. Acad. d. Wis.scn- 



schafteu, Wien, Bd. 38, 1877, 

 '81. Ueber einige bLslang noch unbekannte Larvenstadien von Khizo,stoma. Zool. Anz., 1881, No. 70, p. 79. 

 '83. Uutersuchungen iiber die Organisation nnd Entwicklung der Medu.sen. Prag and Leipzig, 1883, 90 pp., 2(1 pis. 

 '84. Die Ephyren von Cotylorhiza und Rhizostoma. Arb. zool. Inst. Wien. vol. .'>, 1884, p. 109. 

 '90. Ueber die Entwicklung des Scyphostoma von Cotylorhiza, Aurelia, und Chrysaora. 1. Arb. /.ool. Insl., Wien, 



vol 9, 1890, p. 29. 

 '92. Ueber die Entwickhmg des Scyphostoma von Cotylorhiza, Aurelia nml Chrysam'a, sowic iiber die .systemati.schc 

 Stellung der Scyphomediisen, II. Arb. a. d. zool. In.st. (}. Univ. Wien, vol. 10, 1892, pp. 1-70. 



