Canadian Eotifera. By J. Murray. 289 



Oallidina asperula sp. n. Plate VIII. figs 11&-11/. 



Speei/lc character*. — Small ; trunk papillose. Corona less than 

 trunk, collar not prominent, upper lip showing two fine points in 

 the sulcus between the discs. Antenna short, rostrum very short. 

 Teeth 3 or -1+1. Foot 4-jointed ; spurs short, divergent, 

 acuminate, interspace small ; last foot-joint very short, widely 

 expanded into a sort of collar surrounding the toes. Egg oval, 

 with large rounded knobs. 



Length 250 fi when feeding, width of corona 60 /a, neck 36 /x, 

 trunk 80 /i, across spurs 18 /x, egg 110//, by 90 fi over the knobs. 

 Sulcus less than width of disc ; the sharp points are the ends of 

 the collar folds.' Rostrum broader than long, lamellae never seen. 

 Antenna £ to § of neck width. First trunk segment not papillose, 

 of a constant and peculiar shape (see fig. 11a). Second trunk 

 segment, central trunk, and rump regularly papillose ; foot smooth. 

 Jaws constricted below the broadest part. 



Habitat. — British Columbia; abundant. 



Readily distinguished from all other Bdelloids by the papillose 

 trunk, number of teeth, points on the upper lip, and peculiar foot. 

 Mniobia obtusicornis, also described in this paper, has the last joint 

 of the foot similarly expanded. No doubt the expansion is a 

 support to the toes, and probably acts as a sucker. 



Callidina aculeata (Milne). 



The Canadian form is almost identical with a South African 

 variety, which is figured in a paper in the Annals of the Transvaal 

 Museum (now in press). There are five dorsal tranverse rows of 

 spicules on the trunk, many spicules on the rump, and an annular 

 thickening on the first foot-joint. 



Callidina papillosa (Thomp.). Plate VI. figs, oa-oc. 



Variety. — Small, lateral warts, more numerous than in the 

 type. Teeth 4 or 5. The egg is oval, with prominent knobs. 

 The example figured (figs, ob, be) shows external characters both 

 of the egg and of the contracted animal, but whether the parent 

 had died and its skin shrivelled on to the egg, or the young had 

 partly burst the egg and then died, could not be made out. 



Variety (not figured). — The warts are almost obsolete. Rocky 

 Mountains. 



Variety. — Small, like that figured, but teeth 2. 



Callidina canadensis sp. n. Plate VI. figs. 4«— Id. 



Specific Characters. — Large, stout, papillose ; sulcus deep, collar 

 prominent : second anterior trunk segment with very large latera 

 protuberances ; central trunk with warts at posterior angles ; 



