J. E. LORD ON TWO NEW ROTIFERS. / t 



the chalky brain-mass and cervical eye of T. anyiidosa and 

 T. selenura, which are not present in my T. nitida. In fact, the 

 three forms T. anmdosa, T. selenura, and T. Levenseni show 

 strong evidences of their notommatous relationship, while my 

 T. nitida is evidently an annectant form with Gosse's genus 

 Proales. There are still tw^o newly described species with the 

 characters of which I am unacquainted — viz. T. viscosa of Levander 

 and T. clavigera of Stokes. Judging from the specific names, one 

 would be inclined to say that they represent species different from 

 T. nitida. 



2. Callidina cataracta, sp. nov. 



Sp. char. — Trunk brown ; integument leathery, minutely 

 shagreened and slightly viscid ; 14 strongly marked longitudinal 

 ridges, the 4 central ones not parallel ; the 2 anterior central 

 ones approximate, and then cUverge to about the beginning of the 

 second central segment, where they are connected with the next 

 pair by a transverse fold ; posteriorly they are broken up and 

 connected by several cross-folds, so as to form a parquet-like 

 pattern ; with 4 anterior spines, 2 medio-dorsal, and 2 lateral ; 

 anterior ventral margin, with a central curved excavation ; 

 8 rough spines, with acuminate points in a single transverse row, 

 just behind the middle line, following which is a deep, rounded 

 depression; corona (0*070 mm.) wider than neck (0*050 mm.), 

 with a rather deep, square sulcus (0*016 mm.); foot of 5 segments ; 

 antenna long (0'030 mm.) ; spurs small (0*009 mm.) and conical, 

 slightly separated at base ; toes 4, in 2 unequal pairs ; rami 

 formula 2/2. Length from tV ^^ e^ ^f ^^ inch (0*350 mm.). 



In recent years the additions to the genus CalHdina have been 

 very numerous. In Hudson and Gosse's monograph only ten 

 species were admitted ; but since that time, through the labours 

 of several Continental microscopists and one or two indefatigable 

 members of the Quekett Club, the number has been brought up 

 to 34 ; and I here describe another of the spinous forms of the 

 genus. It is very close to C. alpium, but still nearer to a spinous 

 form found near Geneva by Dr. Weber. Indeed, it has only been 

 by a further study of drawings of the latter, kindly lent to him 

 by Dr. Weber, that Mr. Bryce has been enabled to separate 

 them, and he now considers them distinct species. As I under- 

 stand that Dr. Weber has now published his work on the Bdelloidse^ 



