FLAGELLATE INFUSORIA AND ALLIED ORGANISMS. 75 



through the long neck. No nucleus was found, neither was 

 the process of food ingestion observed. 



Salpingoeca Clarkii, new sp. 



This organism was frequently found on the stem of 

 Antophysa vegetans ; it must be regarded as a peculiar 

 species, closely allied to Clark^s Salpingaca marina, ^ from 

 which it differs in the form of its case, as is shown 

 in fig. 10. The shape is comparable with that of a flower 

 vase, and it extends behind into a delicate stem-like por- 

 tion, which, as in Salpingmca gracilis, is a hollow and 

 narrower portion of the case, and not a solid support, as 

 it is in Saljiigceca marina. The free anterior border of the 

 case is spread out so as to be broadly funnel-shaped, and from 

 it project the collar and flagellum. The organisms are also 

 able to open or close the border of the calyx, and this is 

 undoubtedly in connection with the mobility of the creatures 

 in their cases. They are ordinarily found, like Salpingceca 

 marina, in the front portion of their cases (fig. 10), but on 

 being disturbed they go down to the bottom, so that the 

 collar, which has become closed, only just projects above the 

 rim of the calyx. In this condition it is very difficult to dis- 

 tinguish the collar. The flagellum is readily visible, and is 

 generally quite motionless and slightly extended. The inges- 

 tion of food has not been followed, although there are 

 usually a number of particles, which are undoubtedly food 

 particles, lying in the body. The nucleus is easily seen, and 

 lies, as in other forms, anteriorly ; its structure is the same 

 as in Codosiga and Salpingoeca gracilis. The contractile va- 

 cuoles are present, situated on opposite sides of the body, as 

 in Codosiga, or close to each other, as in fig. 10. The height 

 of the calyx is 0019 mm. 



As an appendix to the genus Salpingceca a small orga- 

 nism is here mentioned, which was pretty frequently found upon 

 the stem of Antophysa vegetatis, and of whose exact position 

 the author is not quite certain, on account of the great diffi- 

 culty in studying a new organism of such minuteness. These 

 small Flagellate organisms inhabit a case fixed upon the 

 stems of Antophysa, as seen in fig. 11, a c, which shows 

 varying forms. The walls, which are of considerable thick- 

 ness, are of a deep brown colour, and have an irregular and 

 rough contour. The height of the case is about 0*008 mm. 

 The protoplasmic body generally fills the case, and may either 

 extend beyond it to a greater or less extent, or not at all^ 

 At the anterior extremity, which extends beyond the case. 



