39 
Interbrachial spaces of the oral side covered by few, irregular 
plates, none of them being conspicuously larger than the others. 
Oral shields as broad .as long, with a somewhat rounded apex in- 
KS 
ne, 
SÅS (OX LY IN 
DJ SX =a SID 2 
Fig. 5 
Fig. 2—8. Ophiozona tjalfiana. 2. oral side; 3. dorsal side. 7%/,. 
Wards and a straight cut outer edge. Adoral shields meeting within, 
Conspicuously widened at the outer end. Oral papillæ 6 to each 
side, the three outer larger, especially the penultimate. First ventral 
