260 JAMES MURRAY ON A NEW 



General description. — Length, 325/x. Diameter of trunk, 106^ ; 

 of corona, 86/x. Build somewhat like C. quadricornifera, Milne, 

 to which the processes on the foot further suggest relationship, 

 but head and foot relatively longer. It further differs conspicu- 

 ously in the numerous teeth, a feature only found hitherto among 

 the pellet-making and [symbiotic species of Callidina. The 

 vibratile tags differ from anything I have seen in Bdelloids. As 

 a rule the tags are inconspicuous and difficult to see, so that, 

 although I always look for them, I cannot claim to have observed 

 them in all the species ; known to me. In all cases when they 

 have been seen they are narrow, usually with straight parallel 

 sides, but occasionally spindle-shaped. In this species they are 

 conspicuous, and obtrude themselves on the attention without 

 being specially looked for. They are nearly round, and look like 

 little inflated bladders. The name is taken from this, the most 

 striking character. 



The corona is less in diameter than the broadest part of the 

 trunk, and has large discs on which central papillae were seen, 

 though no setae could be distinguished. 



The discs are separated by a space about two-thirds of the 

 diameter of one disc. The lateral folds of the upper lip are 

 prominent, and stand some little distance apart. 



The broad central portion of the trunk is longitudinally plicate, 

 the folds few, broad, the dorsal faint, the lateral deep. The jaws 

 bear six strong teeth on one side and five on the other, and many 

 fine transverse striae. The voluminous stomach has very thick 

 walls, which are filled with globules of moderate size and pale 

 yellow colour. The foot is of four segments. The first bears 

 a pair of processes, similar to those of C. quadricornifera, Milne. 

 In that species the processes are usually acute, and directed back- 

 ward. In this they are blunt and point forward. 



The spurs are of^ moderate size, divergent, acuminate, obtuse, 

 decnrved, separated by an interspace greater than the length of 

 the sj ui'. 



