366 Transactions of the Society. 



and behind the first joint of the foot, not unhke that of Copeiis lyachyurus. 

 The branchial system displays thick convolute vessels and a small con- 

 tractile bladder. The whole animal, in life, is often tinged with dehcate 

 yellow, of deeper hue in the stomach. Several specimens which seem to 

 belong to this species, recently obtained (April 1887) from a pond near 

 my residence, have the head of an orange hue, the front half of the 

 mastax of a transparent crimson, and the eye of a rich ruby-red ; the 

 whole giving a most attractive appearance to the animal, which is, more- 

 over, very vivacious in manner. (Fig. 10.) 



11. Proales othodon. Body nearly cylindric, but arched in the line 

 of the back, straight in that of the belly ; very plump throughout : 

 mastax forcibly protrusile : foot and toes minute. Length 1/144 in. 

 Lacustrine. 



This also occurred in water from Woolston — a single example only. 

 It is of plump hog-like form, without wrinkles, and almost without folds. 

 It has no very marked characteristics, yet it does not seem referrible to 

 any recognized species. There is a slight projection from the front in a 

 lateral view (s), which, however, in a dorsal viewer) appears to be a wide 

 ridge seen endwise. The face is obliquely prone, from the midst of which 

 the jaws are occasionally protruded, with force, in the manner of a fierce 

 Biglena : the details of these jaws 1 was not able to trace. A sac-like 

 brain is conspicuous, but I could discern no eye. The stomach and 

 distinct intestine are ample ; the former carries a pair of gastric glands, 

 which are large, high, and pointed. (Fig. 11.) 



12. Proales prehensor. Body bottle- or oil-flask-shaped, but with the 

 belly nearly flat ; fore parts long, very protrusile ; eye small ; face prone : 

 a short tuberculous tail : foot short ; toes blade-shaped, straight, acute, 

 usually appressed. Length 1/173 in. Lacustrine. 



I have doubts where I should place this species. Technically, it 

 seems a Notommata or Proales, with the form of a Distyla, yet having 

 much in common with Distemma. The toes, in particular (see t), — 

 blades, widest in the middle, "uith slender produced tips, and generally 

 carried close together as one (though sometimes widely spread), — remind 

 us forcibly of Distyla or Cathypna, The trophi, too, suggest the same 

 alliance : viewed ventrally, the length and form of the mallei, and the 

 triradiate incus, for instance : — yet 1 beheve I have seen a great blade-like 

 prolongation of the incus arching far into the occiput ; and, at times, 

 what seemed a short forcipate form of the rami, as in JDiglena and Di- 

 stemma. There appears a sort of proboscis, but close appressed, not 

 at all movable. I have never seen the jaws protruded, though they are 

 every moment brought to the bottom of the ciliate face, snapping up 

 atoms of food. 



It is not much given to locomotion, but can swim, rather slowly : 

 usually, it rolls hither and thither, or adheres by the toes. It picks 

 industriously among the vegetable floccose for morsels of food: it is 

 vivacious and energetic, and altogether attractive ; constantly reminding 

 me of the marine Distemma 7'aptor. I have observed, in all, about a 

 score of examples, all isolated, in water courteously sent me by Miss 

 Davies, from Woolston Pond. (Fig. 12.) 



