EXPLANATION OF PLATE XXXVIII. 



Lcpidonotus hedlcyi, sp. nov. 

 Fig. 1. An elytron (x 8). a. the anterior margin, e. 



external margin. 

 Fig. 2. A portion of its surface ( X 250), showing the round 



pigment cells and empty cells ; these lie at a lower 



level than the tubercles, two of which are shown. 

 Fig. 3. Four tubercles from an elytron of different shapes 



(x 250). 

 Fig. 4. A parapodium (x 20), seen from the anterior face ; 



gl. Gland at the base of the dorsal cirrus. 

 Fig. 5. A notopodial chaeta (x 500). The pectinated frills 



in this and next figure are merely indicated by 



dotted lines. 



Fig. 6. A neuropodial chaeta (X 250). 

 Fig. 7. A neuropodial chteta from another aspect ( 250). 



Lepidonotus willeyi, sp. nov. 

 Fig. 8. An elytron (x 20), showing the limitation of the 



fringe to the external margin; ant. the anterior 



border. 

 Fig. 9. Portion of the external margin of an elytron ( x 250) 



showing some of the smaller tubercles. 

 Fig. 10. Portion of the aritero -dorsal area ( x 250), with 



simple tubercles. 

 Fig. 11. Some of the larger tubercles (x 250). a. from the 



external area ; b. from near the middle ; c. one of 



the largest in the posterior area. 

 Fig. 12. A parapodium (x 35). 

 Fig. 13. A notopodial chaeta, with blunt apex (x 500). 



The pectinated frills where they cross the surface 



are omitted from this and the next. 



Fig. 14. One of the long notopodial chsetse, with a fila- 

 mentous apex (x 500). 

 Figs. 15 and 15A. Two aspects of a neuropodial chaeta 



(X 360). 



Physalidonotus rugosus, sp. nov. 

 Fig. 16. The prostomium (x 10), the hinder border of 



which is overlapped by the first " pad " or elytra! 



support. 

 Fig. 17. An elytron (x2), the characteristically elongated 



areola is indicated by dotted line. Ant., anterior 



margin. 



Fig. 18. A portion of the external area and margin of an 



elytron (x 20). 



Fig. UK One of the supra-areolar tubercles (x 20). 

 Fig. 20. A tubercle from the posterior area (x 35). 

 Fig. 21. Another tubercle from the posterior area (x 35). 

 Fig. 22. Base of a cirriferous parapodium from behind to 



show the branchial papulae (enlarged). 



