OF THE C(ELE>'TERATA. 253 



(47.) Gegenbaur. — 'Zur Lehre vom Generationswechsel und der 

 Fortpflaiizung bei Medusen und Polypen,' 1854. 



(48.) . — ' Versuch eines Systemes der Medusen, mit 



Beschreibung neuer oder wenig gekannter Formen,' Z. W. Z. 

 1857. 

 (49,) M'Crady. — ' Gymnophihalniata of Charleston Harbor,' Ell. Soc. 

 Proc. 1857: and the syste;natic papers of Peron et Lesueur, 

 Ann. d. Mus. 1809-10; Brandt, Petersb. Mem. 1833 and 38; 

 and LuTKEN, Videns. Med. 1850 ; with other memoirs by 

 Allman (Structure of Lucernariadaj), Q. J. M. S. 1860^ 

 Milne Edwards (Structure of yEquorea) (67), and (Circu- 

 lation in Lucernaridae), A. S.N. 1845; Derises (Hermaphro- 

 ditism of Chrysaora), Ann. S. N. 1850; KoLLiKER (Medusidae 

 of Messina), Z. W. Z. 1853; Leuckart (Medusidae of Nice), 

 Wiegm. Arch. 1856; Fritz Muller (Gastric filaments of 

 Lucernaridaj), Z. W. Z. 1858; Eysenharut (Rhizostoma) 

 Nov. Act. 1821 ; and Tilesius (Cassiopeia), Nov. Act. 

 1831. 



On Structure of Marginal Bodies see especially Gegenbaur, 

 Arch. Anat. 1856 (or English abstract in Q.J. M. S. 1858). 



On Minute Structure of Medusidae and Lucernaridae, vid. Busk, 

 Mic. Trans. 1852; Schultze, Arch. Anat. 1856; and Hux- 

 ley (46). 



On Structure of Charybdeidae : Milne Edwards (Charybdea), 

 Ann. S. N. 1833 ; and Fritz Muller (Tamoya), Halle Abh. 

 1859. 



On Development of Medusidae; J. Muller (.^ginopsis). Arch. 

 Anat. 1851 ; Gegenbaur (Cunina and Trachynema), (47); 

 Fritz Muller (Liriope), Wiegm. Arch. 1859; M'Crady 

 (Cunina), Ell. Soc. Proc. 1856; and CLAPARt;DE, Z. W. Z. 

 i860. 



On Development of Lucernaridae: Sars (21), Tsis, 1833, and 

 Wiegm. Arch. 1837-41 and 1857; Siebold, Beitrage znr 

 Naturgeschichte der VVirbellosen Thiere, 1839 ; Steenstrup 

 (24); Dalyell (9); Desor, Ann. S. N. 1849; and Reid, 

 *Physiolo:,ncal, Pathological, and Anatomical Researches,' or 

 A. N. H. 1848. These writers treat chiefly of Aurelia, Cyanea, 

 and Chrysaora. For the development of other genera see 

 Gegenbaur (Cassiopeia), (47) ; Frantzius (Cephea), 

 Z.W.Z. 1853; and Krohn (Pelagia), Arch. Anat. 1855 (or 

 English abstract in A. N. H. 1856). 



