"SSfnlu, ApruTS'] J^o!/(d Microscopical Socidij. 189 



lines running ronnd parallel to the velum, giving it the appearance 

 of fine basket-work. I examined the animal very carefully, with 

 carmine in the water and oblique illumination, using a power of 

 500 diameters, to see if I could see any cilia clothing the body of 

 the creature, hke there always are on the body of the stentor, but 

 I failed to find any. The velum bearing the ciha may be said 

 to begin at the perpendicular part of the disc, near the mouth, and 

 running round the inside of the edge, continues uninterruptedly 

 till it reaches the same place again. From here two short processes 

 are sent towards the centre of the disc, and in tliis grove is situated 

 the mouth, and I think the anal opening. These processes are 

 edged with vibrating cilia. The mouth is funnel-shaped, lined with 

 cilia, and leading down to a short oesophagus. It is situated on the 

 left side of the disc, in the place the mouth of all this class of crea- 

 tures is. Below the oesophagus are a series of vacuoles, which 

 become very apparent when the animal is fed with carmine. The 

 two or three upper ones are small. Then there is a large one, 

 looking very like a stomach. Below this, even into the part within 

 the case, is a row of small ones, and some others leading up to the 

 cloaca which is in the centre of the disc. Close to this cloaca, and 

 not far from the mouth, is an oval-shaped body, having two fine 

 branches leading down the whole length of the body, one on either 

 side of the vacuoles containing food, giving them the appearance of 

 being enclosed within an intestine. It also sends a branch to the 

 mouth, and another to the cihary edge of the disc. This latter 

 branch runs all round the edge. I think from its position, which is 

 the same as that of the nervous ganghon of the Polyzoa, that this 

 must be the nervous ganglion of this animal. It has the grey look 

 of nervous matter. That an animal having the power of protecting 

 itself within a case, and retracting readily on a jar being given to 

 the microscope stand or table, should have, and should require a 

 kind of nervous system is not much to be wondered at. This animal 

 being larger than the generality of these creatures, it can be seen, 

 whilst in many of them it cannot. In front of the large stomach- 

 like mass are three clear vacuoles that did not become filled with 

 the carmine, or even stained with it. What their ofiice is I could 

 not find out. On either side of the same mass was a contractile 

 vesicle. The appearance of the expanded head of the animal, when 

 it has its oral side towards you, is most extraordinary, putting one 

 in mind of those old arm-chairs seen in the halls of large houses, 

 for the waiting-door porter to sit in. Fig. 2 is the animal in that 

 position, and it shows in side view the shape of the expanded disc. 

 The back is carried straight up in continuation of the body ; but 

 the front lobe is bent down, showing an expanded surface round 

 which the ever-moving cilia play. Fig. 1 is a front view of the 

 creature, and in that the peculiar ear-shaped disc is seen. I saw a 



