334 Mr. A. T. Watson. [Oct. 23, 



Diagrammatic Outline of entire Worm, viewed from left side, showing dorsal setae and 

 ventral uncini (indicated by dots) in tbe anterior or thoracic portion, and the inverted 

 arrangement (dorsal uncini and ventral setae) in the much longer abdominal part. 

 The portions referred to are indicated by tbe corresponding letters, a, b, c, in the 

 diagram. Points of fracture shown by arrows. 



Figures to left, a', b', c', show respective fragments as restored. New growths 

 (head and posterior) and setae and uncini of converted (abdominal into thoracic) 

 segments shown by thin lines and small circles. 



