426 ^- H. FULLARTON, 



however to have had some doubt, for their statement is hypothetical. 

 "Si cet animal est un mollusque, il doit être placé après les 



Busch '), along with his teacher Johannes Müller, in 1847, 

 obtained Tomopteris in Heligoland, and threw doubt on the inter- 

 pretation, which had been given as to the lateral appendages being 

 "Athmungswerkzeuge", and he described them as "zur Ortsbewegung 

 dienend". He was unable to find a lumen in the network ("Ver- 

 zweigung") of the plates springing from the distal ends of the lateral 

 appendages, and concluded that Eschscholtz had wrongly placed it 

 amongst the swimming Gastropods, as the characteristic foot was 

 awanting. 



Grube'-) in the following year discussed the position of Tomo- 

 pteris and placed it amongst the Worms, regarding it as a Chaetopod 

 destitute of bristles. He placed it in a new subdivision of the Appen- 

 diculata Polychaeta, which he called Gymnocopa ^). 



Sir John Dalyell*) independently recognised its Annelidan 

 character and called it Nereis phasma or the Spectre Nereis, while 

 Gosse ^) called it Johnstonella catharina, afterwards in his Marine 

 Zoology ^) reverting to Eschscholtz's name Tomopteris onisciformis. 



(xenerative Organs and Products. 



The earliest described example showed genital cells. Eschscholtz ' ), 

 although he did not designate them generative products, or apparently 

 recognise their genital character, saw what he termed "kleine 

 Kügelchen" both "in den Flossen" and "in der Höhle des Mittelleibes". 



QuoY & Gaimard ^) also recognised eggs. Their words ^) are: 

 "On voyait facilement de chaque côté du tube digestif un grand 



1) Busch, Einiges über Tomopteris onisciformis, in: Archiv f. Anat. 

 u. Physiol, Jahrg. 1847, p. 180, tab. 1, fig. 5. 



2) Gkube, Einige Bemerkungen über Tomopteris und die Stellung 

 dieser Gattung, in : Archiv t". Anat. u. Phj'siol., Jahrg. 1848, p. 450, 

 tab. 16, fig. 9—13. 



3) Gkübe, Die Familien der Anneliden, in: Archiv f. Naturgesch., 

 Jahrg. 16, V. 1, 1850, p. 249. 



4) Dalyeli., The powers of the creator, V. 2, tab. 30, fig. 16, 17, 

 p. 260, London 1853. 



5) Gösse, Naturalists rambles on the Devonshire coast, London, 

 p. 356. 



6) Gösse, Marine Zoology, V. 1, p. 106, London. 



7) p. 733. 8) p. 236. 



