jyotes on Victorian Rotifer.s. 73 



in the retractile state the seise seem to spring from the l)ody 

 itself; bnt when the animal expands, that pai-t of the body 

 c»n which the sette ai-e situated becomes iritlated, so as to 

 form two projecting- rounded cones on each side. These 

 cones are placed some distance apart, and in ventral aspect 

 their api)earance is very characteristic, the body sloping out- 

 wards to their sunnnits till it is halt" as broad again as it is 

 at their base. When seen somewhat sideways, the anterior 

 slope to the neck is very abrupt, and makes almost a right 

 angle with the axis of the body. When recurved, the sides 

 of the body are drawn back in a deep fold over the wrinkled 

 foot, encircling it, till the bottom of the intestine touches 

 the top of the foot. We observed three vibratile tags in each 

 lobe of the corona, one on each side of the neck, and one in 

 the body near the lower end of the stomach. Two red eye& 

 were clearly seen in young nearly ready for hatching in the 

 eggs. When tirst seen, the whole body was covered with a 

 layer of gelatinous material, but in a specimen kept alive on 

 a slide for a couple of days, this layer disappeared. Unlike 

 most (Ecisted, it attaches itself to its tube rather than to the 

 plant on which the tube is fixed, resembling Floaculai'ia calva 

 in this respect. It sways itself from side to side, curving 

 right over the edge of its tube. 



Sp. cli. Corona indistinctly two-lobed, ventral antennse- 

 placed on the surface of the body wide apart, the body when 

 expanded {projecting upwards and outwards to their point of 

 insertion in two rounded cones. Tube gelatinous, rounded \ 

 length, y^gth in. 



(xx) Lacinularia veticuUita. This species has at first sight 

 a considerable resemblance to L. socialis, but a more careful 

 examination brings out points of difiFerence important enough, 

 we think, to prove it a new species. It is found in small 

 colonies, often of onl}- two or three specimens; the largest we 

 have seen was composed of a dozen. In internal structure, 

 it crnforms to the usual type of Melicertadpe. Its distinctive 

 features are a heart-shaped corona, as broad as long, and as 

 broad half-way down as it is at its ventral end, giving it a 

 somewhat rectangular appearance. This rectangular appear- 

 ance is clearly shown in some specimens we mounted. The 

 dorsal gap in the corona is comparatively large, and easily 

 seen. But the most important point of difference between 

 this and the other species of Lacinularia is the presence of 

 antennse, both doisal and ventral. The dorsal antenna is 



