EXPLANATION OF PLATE XXXI. 

 Potamilla leptochaeta, sp. nov. 



Fig. 28a. — Anterior end, dorsal view. X 70. 



„ 28B. — Anterior end, lateral view. X 50. 



„ 28c. — Branchia, almost entire. X 50. 



„ 28D. — Tip of another branchia. X 50. 



„ 28E. — One of the shorter setae of the ist thoracic segment. X 840. 



„ 28F. — A dorsal capillary seta from the 6th thoracic segment. X 840. 



,, 28G. — Spatulate setae from the 6th thoracic segment. X 840. 



,, 23H. — Cuspidate setae from the upper part of the anterior row of ventral 

 setae of the 4th thoracic segment, x 840. 



„ 28J. — Cuspidate seta from the lower part of the anterior row of ventral 

 setae of the 6th thoracic segment, x 840. 



,, 28K. — Avicular uncinus from the 6th thoracic segment, x 840. 



„ 281,. — Side view of one of the longer capillary setae from one of the 

 anterior abdominal segments. X 840. 



„ 28M. — Face view of one of the shorter capillary setae from one of the ante- 

 rior abdominal segments. X 840. 



„ 28N. — Avicular uncinus from one of the anterior abdominal segments. 

 X 840. 



Fabricia (Manayunkia) spongicola, sp. nov. 



Fig. 29A. — Entire animal, dorsal view, x 70. 

 „ 29B. — Capillary setae from a thoracic segment. X 1050. 

 „ 29c. — Ventral crochet from a thoracic segment. X 1700. 

 „ 29D. — Capillary seta from an abdominal segment. X 1050. 

 „ 29E. — -Crochets from an abdominal segment. X 870. 



Myriochele picta, sp. nov. 



Fig. 30A. — Complete specimen (?). x 50. 

 „ 30B. — Anterior end, in tube. X 50. 

 „ 30c. — Lateral view of the anterior end. X 70. 



„ 30D. — Ventral view of the anterior end, showing internal structure. X 90. 

 „ 30E. — Crochets. X 1730. 

 ,, 30F. — Crochets viewed from above. X 2000. 



