190 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 8 



PLATE 28 



Thyonepsolus beebet Deichmann p. 139 



1. Perforated plate from ventral sole. 



2. Curved supporting plate from dorsal side. 



3. Hourglass-shaped body from dorsal side. 



Psolidium eubullatum, new species p. 144 



4-7. Knobbed plates from ventral sole. 



