64 



seen when the process of self-division was incomplete. I have 

 also seen these creatures divide transversely. Fig. 16 and 18 are 

 two acenatas ; Fig. 18 has a stiff pedicle, and the spines are 

 conical and pointed ; Fig. 16 has a flexible stem, and the spines 

 are largest at the extremities, they are said to be suctorial tubes 

 by which nutriment is conveyed to the creature. In some species 

 the spines are club shaped, in others they are pinnated. Fig. 24 

 is vaginicola valvata ; Fig. 25 is a group of the trumpet 

 animalcules ; Fig. 17 is perodina patina ; Fig. 28, a paramecium ; 

 Fig. 29, a specie of trachelocerca, the neck of which at times is 

 extended to seven times the length of the body; Fig. 32, another 

 form with flagellum ; Fig. 31, the epistilis ; Fig. 30, one of 

 the oecistis. 



A NEW ROTIFER, DESCRIBED AND EXHIBITED BY 



MR. J. FULLAGAR, FOUND ON THE WATER-PLANT 



RICCIA FLUITANS. 



This was described in the Report of 1879, but through the 

 kindness of Mr. Bateman, who undertook to photo some of 

 Mr. Fullagar's sketches, it was thought worth while to insert it 

 in the present Report with a somewhat fuller description of the 

 rotifer, which the sketches will illustrate. 



Figs. 19, 20, 21, 22, 23, and 26 in the photograph are those 

 connected with the rotifer. I had for a long time in a vase a 

 quantity of riccia fluitans, some of which was decaying, and 

 the chiorophyl, or colouring matter, had left a portion of the 

 vegetable tissues quite clear and transparent. On placing some 

 of the decayed weed under the microscope on January 21st, I 

 observed some round bodies, of an amber colour, in which were 

 seen some globular forms of various sizes (Fig. 19). They 

 gradually changed their form, and the round body slowly 

 elongated and took the form in Fig. 20. The contents in the 

 centre were seen to move and turn half round, backward and 

 forward, a motion frequently seen in some rotifers and in the 

 ova of many small animals. In about three hours after the 

 round body (Fig. 19) had taken on the form of Fig. 20, a sort 

 of tube or shaft gradually protruded from the pointed end, and 

 displayed a row of rather long vibratile cilia rotating on the top 

 (Fig. 21, a). The tube was quite as long as the diameter of the 



