974 NOTES ON A CEROID OF PORT JACKSON, 



which the authors mentioned describe. The figures of Richard 

 Hertwig resemble this part of Neis so closely that T consider it 

 unnecessary to describe it more minutely. The zone of the 

 gland cells is not embedded in the Gallert, as Chun represents. 

 The only essential difference, in this respect, between Neis and 

 Beroe is met in the zone of the ciliated cells. 



This is mainly supported by excrescences of the Gallert, which 

 are ring-shaped. The ciliated cells radiate from the Gallert- 

 ridges, and remind us in this respect of the so often described 

 appearance in other Ccelenterata. These ciliated cells agree with 

 those of Beroe, which Richard Hertwig describes (6, p. 334,) but 

 between them are found slender granulated sensitive cells, which 

 resemble the homologous elements in the fringes of the Pole-fields 

 very closely, and possess the type of the ectodermal sensitive cells of 

 other Ctelenterata. 



Between the ciliated and sensitive cells on the one side and the 

 Gallert on the other, are found in this zone exclusively, numerous 

 pear-shaped Ganglia-cells which appear connected with the sensitive 

 cells by very fine nervous threads. Towards the aboral pole they 

 are continued into a thick granulated nerve which can be traced 

 for some distance without difficulty on longitudinal sections and on 

 surface preparations. 



Style-cells. 



Concerning the sensitive cells with styles of Cestus, Eucharis and 

 Beroe, described by Richard Hertwig, I have arrived at a conclusion 

 which differs essentially from that adapted by him and by Chun. 

 I consider these elements not to have a mainly sensitive function. 

 As well in the Papillae of Eurachis multicornis as in those of Cestus 

 and in the homologous zone of Beroe these large styles which differ 

 by their thickness and the different refractive power from ordinary 

 sensitive cilia, are very striking, they are always found thickly 

 surrounded by gland-cells. In other Caelenterata such styles are 

 never to be found. The Palpocils of the Sarsia-polypes (10) alone 

 can be compared with them, and these are very different in shape 

 aud of unknown function. The sensitive cilia of other Ccelenteraca 

 are much finer and resemble the cilia of those sensitive cells, which 



