PLATE LI. 
Fig. 1. Anterior region of Pista mirabilis, viewed laterally, . . Enlarged. 
Fig. 2. Tube of the foregoing, ..... Slightly enlarged. 
Fig. 3. Anterior region of Lecena neo-zealanice, viewed from the dorsum. 
The specimen is much injured. 
Fig. 4. Dorsal view of the anterior region of Euthelepus cliilensis, . 
Fig. 5. Ventral view of the same region, .... 
Fig. 6. Artacama challengericB. From the lateral aspect. 
Fig. 7. Anterior lateral region of Artacama zebuensis, 
Fig. 8. Lateral view of Terebellides ehlersi, 
Enlarged. 
Enlarged. 
Enlarged. 
Enlarged. 
Enlarged. 
Enlarged. 
