234 Dr. W. M. Dobie on two new species of Floscularia. 



The following table will serve to show the relation these new 

 species bear to the Floscularias which have been already dis- 

 covered. 



The usual length of the adult Floscularia campanulata is about 

 j^th of an inch when extended, but I have met with specimens 

 larger than this. The case in this species is long, and not very 

 defined, its surface is granular, and it contains minute rounded 

 bodies in its substance. 



The body of this Floscularia when fully contracted is com- 

 pletely inclosed within its case, which however is absent in the 

 young animal. The body in both species is hyaline or colourless, 

 except when coloured food has been received into the alimentary 

 canal. 



The entrance to the alimentary canal in the Floscularia cam- 

 panulata resembles a large open cup, and may be termed the in- 

 fundibulum ; the edge of which, when the animal is expanded, 

 is divided into five lobes by a corresponding number of depres- 

 sions. Each of these lobes is flattened or laminar, slightly 

 thickened at the margin, which is thickly fringed by long and 

 very delicate cilia or setae, except for a small space in the middle 

 of the depression. One of the lobes is rather larger than the 

 other four. Five bands, apparently muscular, are seen passing 

 to the centre of these depressions. Lines of a fainter description 

 run up the centre of each lobe to near its apex ; these hues are 

 frequently observed to contain highly refracting bodies resem- 

 bling little globules of oil. See fig. 3. 



The rotatory organ of the Floscularia cornuta differs from the 

 preceding ; it is divided by very deep depressions into five lobes, 

 each terminated by a kind of ciliated knob ; and to the back of 

 one of these lobes the flexible cornu is attached externally. The 

 infundibulum in both species is separated from the next cavity, — 

 which, following Dujardin, I call the vestibule, — by a rim en- 

 larged at certain points into little knobs, each of which is clothed 

 with cilia, not vibratile. 



The next portion of the alimentary canal is the crop separated 

 from the vestibule by a diaphragm, in which is a slit-like open- 

 ing fringed with vibratile cilia, the motion of which gives rise in 



