370 DAVID BRYCE ON THREE NEW SPECIES OF CALLIDINA. 



distinctive pose, in which the ample width of the corona became 



accentuated. The widely separated pedicels are distinctly 



divergent, although of moderate height. The trochal discs 



converge slightly to the median line, and have also a moderate 



dorsal inclination. The secondary wreath does not pass round 



the pedicels at their bases as is usual, but about one-third of 



their height up, a peculiarity which I think occurs also in 



Mniohia magna (Plate) and M. scarlatina (Ehr.). The nexus 



between the pedicels is exposed, and so high as to be nearly level 



with the inner margin of the trochal discs. Centrally it is 



decorated with two minute fleshy ligules. The upper lip rises in 



a very moderate curve nearly to the level of the nexus, and shows 



no trace of notch. As is not unusual, the post-oral segment is 



withdrawn within the following one when the animal is feeding, 



the dorsal antenna only being left visible. The rami appeared to 



2 



be of normal form with the dental formula -. A rather 



2 -f 1 



wide stomach lumen could be easily defined. The lumbar plicae 

 persisted in the feeding position. The foot structure was not 

 satisfactorily determined. My impression was that the toes were 

 absent or modified to a sucker-like disc, in which case the species 

 would properly belong to the genus Mniobia, and this relation- 

 ship receives some support from the position of the secondaiy 

 wreath. Pending further examination, it seems best to leave the 

 species in the genus Callidina. 



Maximum length not recorded ; in feeding position, as figured, 

 about 185 fjL ; corona, about 63 yu ; collar, about 45 }x ; spurs, about 

 -5 fL ; interspace, 6 fx. 



Habitat, as stated above. 



Description op Plate 12. 



Pig. 1. Callidina concinna sp. nov. ; a, egg. 

 2. Callidina nana sp. nov. ; a, egg. 

 3. Callidina decora sp. nov. 



Journ. Quekett Microscopical Club, Ser. 2, rol. XL, No. 70, April 1912. 



