140 Transactions of the Society. 



(1) We have carefully studied countless examples of this 

 rotifer, and have never been able to discern the dorsal cleft which 

 he states (loc. cit.) that he observed. 



(2) Nor have we ever been able to discover the slightest trace 

 •of the bunch of stiff setae on the foot over the base of the toes, 

 which is invariably present in other Diaschizse. 



(3) Furthermore, there is a marked division in the foot, forming 

 two distinct joints, which is contrary to the rule in this genus. 

 There certainly is a lateral cleft, but this is the only point of 

 ■agreement between this species and our genus. 



(4) In its habits it is continually swimming freely, and not, like 

 the Diaschizse, given to grovelling amongst the weeds. 



(5) Its toes are flexible throughout, and it has a queer habit of 

 snapping them as it swims. 



(6) The head is enormously large, the longer axis of the face 

 being even greater than the greatest depth of the rest of the body. 



(7) The jaws are extraordinary in form and structure, and not 

 of the type of this genus ; (8) and again, the lorica as a whole is 

 much more flexible than that of the most flexible Diaschiza. 



These eight points of difference are sufficient to account for our 

 hesitation in including this species in this monograph. 



We agree with Mr. J. Hood (loc. cit.) that this species is most 

 probably the Furcularia lactistes of Gosse, a great many examples 

 showing a distinct milky appearance, from which we expect he so 

 named it, and the jaws agree with his description. 



We give a figure of the animal, which will convey a sufficient 

 idea of it without further description. 



Size. — Total length T | 7 in. (200 //,) ; toes alone 7 £ 5 in. (33 fi) ; 

 breadth g-j^y in. (67 /x) ; height at highest point of trunk ±]q in. 

 <54 fj,) ; head ^ in. (63 fju). 



Common in certain localities. 



The following is a list of species described by other authors 

 which are omitted from this monograph or proved to be synony- 

 mous with others herein : — 



D. valga Gosse. — The description, drawing, and measurements 

 of this species, with its very long toes, two-thirds the 

 length of the rest of the body, seem so definitely distinct 

 from any of those here included, that it may be a good 

 species ; but we have omitted it, as we have been unable 

 to secure a specimen. 



D. valga Bilfinger ^ 



D. valga Weber > = D. Hoodii Gosse. 



D. KAMPHIGERA Gosse J 



D. cupha Gosse. — That author's description, from one dead 

 specimen, is so vague, and the size ^ in., and shape of toes, 

 seem to cut it out of this genus altogether. Not seen. 



