PLATE XLIX. 
Fig. 1. Amphitrite herguelensis, viewed laterally. The middle of the body 
is enclosed in a massive tube of fine mud, . . . Enlarged. 
Fig. 2. Lateral view of the anterior region of Terebella gruhei, . " . Enlarged. 
Fig. 3. Anterior region of Terehella {Lanice) Jidbellum. From the lateral 
aspect, ....... Enlarged. 
Fig. 4. Free or upper extremity of the tube of Terehella {Laniee) seti- 
cornis, ....... Enlarged. 
Fig. 5. Lateral aspect of the anterior region of Pista fasciata, Grube. The 
tentacles have been abbreviated, . . . . Enlarged. 
Fig. 6. Tip of the tail of Eupista gruhei, with the anal funnel bent 
upward, .... . . Enlarged. 
Fig. 7. Outline of the anterior region of the same. The specimen is so 
decayed that only a remembrance is attempted, . . Enlarged. 
Fig. 8. Eemarkable tube with longitudinal and somewhat spiral spinous 
ridges. It is chiefly composed of mud, . . Not much enlarged. 
Fig. 9. Fragment of the same more highly magnified, showing the scale-like 
arrangement of the mud. 
