333 



Fig. 2. 



Fig. 3. 



iW*Af 



Fig. 2. Transverse section of the gan- 

 glion, ciliated funnel and adjacent parts in 

 Boltenia Bolteni. The ciliated funnel lies 

 at the right of the ganglion. The ganglion 

 cells are shown in solid black. (165 Diam.) 



cf ciliated funnel; gg ganglion; n nerve 

 to the ciliated funnel ; o opening of the 

 ciliated funnel to the pharynx ; ph epithelium 

 of the pharynx wall. 



Fig. 3. Transverse section of a portion 

 of a muscle bundle of Boltenia Bolteni, 

 posterior to the ganglion, showing the nerve 

 fibres and ganglion cells among the muscle 

 fibres. The ganglion cells are shown in 

 solid black ; the muscle fibres in outline 

 with black nuclei. (340 Diam.) 



nerves has been shown for other Ascidians, also the presence of gan- 

 glion cells in counection with nerves^) but none perhaps give such a 

 clear picture as Boltenia. 



IV. Upon the Nervous nature of certain Lateral Out- 

 growths from the Ganglion in Salpa cordifor mis, chain 

 form; and upon the smaller Eyes in the Salpidse (well 

 developed optic organs with no pigment). 

 In a former paper (loc. cit.) I called attention to certain lateral 

 outgrowths from the ganglion in the chain form of Salpa pinnata, 

 S. Chamissonis, S. cylindrica, S. scutigera, S. bicaudata, S. hexagona 

 and S. africana, and in the solitary form of S. pinnata, S. Chamis- 

 sonis and S. cordiformis. In some species there were two pairs of 

 these outgrowths, one composed of small cells like the smaller cells 



1) See Roule's Plate 4, Fig. 38, in "Eecherches sur les Ascidies 

 simples des cotes de Provence". Ann. de Musee d'hist. nat. de Mar- 

 seille, Tome 2. 



