338 C. ROUSSELET ON LIMXIAS CORNUELLA. 



three times as long, non-retractile, and always standing out 

 prominently and projecting beyond the disc. The ciliary disc 

 is two-lobed, and when expanded it generally lies in a plain 

 at right angles to the tube, not parallel with it, as is the case 

 in the two other species. The animal does not protrude far 

 out of his tube. It has a prominent ciliated chin, and two 

 pairs of minute horny processes are seen on the dorsal side of 

 the head. 



The mastax and internal organization are normal as far as I 

 have been able to see, but the rotifer is rather opaque, and it is 

 difficult to make out much of the structure. Size of tube, 

 ^th to T^th inch. 



t» U 5 



EXPLANATION OF PLATE XXIV. 



Fig. 11. Limnias comuella expanded ; view from dorsal side x 180. 

 „ 12. Head of same, ventral aspect x 200. 

 r , 13. „ ,, dorsal aspect x 200. 



,, 14. Various forms of tubes x 60. 



