60 T. GisLEX, 



Disk 4 mill. Anal tube eliimiiey-shaped. 1.;) mm., subcentral 

 The skin smooUi. without papilljie. Mouth soniewliat mai-ginally dis- 

 placed. 



Sp. 2 (St. ih) C. XIX !)-12: 2—4,,-. nun. — H— s visible in the 

 corners. R — s h = i/s br. 1 Br 1 h = V2 bi'. Ai-ms X, 2') nun, The 

 distal borders of the axillai-ies spiny and bent outwards. Syzygies 

 ;{ + 4. 11 ^-12. distally with an interval of usually :} oblicpie articula- 

 tions. Distal Br-segnients L - 2 X l)i-. strongly hour-glass-shaped and 

 spiny. 



Pj + 20 (about 5 coarse T\ ;i mm., 1'.^ absent. P., without a coinb 

 7; 1,.5 mm. Distal p. -r: 2,2 mm. — Disk 2..-. mm. Anal fuimel 1 nun. 

 Mouth somewhat dislocated. 



A young form of Vauia. 



Sji. 1 (St. 50j C. XII 9; 2 — ;} mm. slender, in a single whorl 

 4**^ segment the longest L=-2 X br. Cd low, flattened. — R— s narrow 

 bands h=- Va br. I Br 1 h = ' 2 br, laterally free. Axillary li ^ 3 ]jy^ 

 pentagonal. Primipostaxillaries well separated inside. The synarthry 

 between Br 1 and 2 usually rather similar to the syzygy between Br 

 3 and 4. Br I and 2 h = V3 br, the outside somewhat broader. Arms 

 X, 12 mm. Br-segments serrate, only slightly overlapping. Syzygies 

 with an interval of 3 oblique articulations. — Pj + (3 T, 1\, and P.^ rudi- 

 mentary or lacking. The following piniuilcs without a comb. Distal 

 p. 2,.'i mm. — Disk 2,5 mm., reaching to Bi- 1. Anal cone smooth, 

 1,2 mm., shar])ly set off with a papilla whorl round the opening. Mouth 

 marginally displaced. Colour yellow-brown. 



Unrecognisable Comasterid young forms. 



-S^). / (St 47) C. XVlil 12 — 17 (usually 15 — 17), 4— S mm. (ip- 

 posing spine a little longer than the preceding ones. ^ — Axillary h = ^/2 

 br. II Br— s in a regenerate 2 (2 cases). Arms XII, W mm. Syzy- 

 gies with an interval of H oi- 4 oblique articulations. — Pj — 1\ with a 

 comb. P., and P., often very snmll (1—2 mm.) P, +2(5 (6 -7 T) 0.5 nun. 

 Distal ]. 12— l:{; 4,.5 nun. 



Disk ;{,.-. mm. Anal tube jyapillated, subecntial. narrow. 2 nun. 

 sharply set off from the disk. Mouth marginal. 



