TUBE OF PANTHALIS. 347 



^Plate X. 



Fig. 1. Sketch from micro-photograph of a " spinning- 

 foot " shewing all three kinds of setae, and two 

 *' mucus " threads {m) entangled in the brushes. 



Fig. 2. Sketch from micro-photograph of a "weaving- 

 foot " shewing its peculiar, very finely serrated 

 setae, v. Ventral Lobe. d. Dorsal Lobe. 



Fig. 3. Diagram. Ventral view of lateral portion of 

 Pantlialis, shewing arrangement of setae in a 

 " spinning-foot." To the left are shewn all three 

 kinds. The ventral and dorsal setae have been 

 removed from the second foot ; the dorsal " brush- 

 like " setse only are shewn in the third foot; and 

 the position and form of the ''spinning-gland" 

 {e) with threads issuing and carried away by the 

 " brush-like " setae {d), are seen in the 4th. 



Fig. 4. Sketch from micro-photograph of " spinning- 

 gland " dissected out and partly uncoiled. Shewing 

 the strong ventral {a), and weaker dorsal {h) 

 acicules; also the stout median setae (c), and the 

 delicate brush-like setae {d). The latter will be 

 seen to emerge close to the mouth of the '' spin- 

 ning-gland " {e), which has, however, got pulled 

 slightly out of position in dissection. 

 Fig. 5. Sketch from micro-photograph of front part of 

 above more highly magnified. Li it the '' brush- 

 like " setae (cZ) can be distinctly traced passing by 

 the mouth of the " spinning-gland " {e). 

 Fig. 6. Proboscis (lateral view) shewing the palps, which 

 are usually straight, but have curled up in dying. 

 The two portions, viz., the trunk (a) of Proboscis, 

 and the jaws {h), with long median tentacles (c), 

 the large fangs {d) and smaller teeth. (Much 

 enlarged.) 



