Fig. XXXI. — r. (Doloria) levis n. sp., 2. — 1. Shell, seen from the side; 35 X. 2. One of the medial bristles of 

 the shell just behind the rostral incisur; 680 X. 3. A part of the list in.side the posterior edge of the shell; 680 X- 

 4. Mandible, seen from within; 224 X. S. Distal part of the mandible, seen from within; 480 X. 6. Gleaning bristle, 

 abnormal type, of the second endopodite joint of the mandible; 1000 X. 



