47 156 Proceedings of the Royal Irish Academy. 



Fig. 



8. Castalia fusca var. liibemica var. nov. a = seta from middle of 



anterior foot ; b = setae from middle of posterior foot, x 530. 



9. Opliiodromus flexuosus (Delle Chiaje). Simple bifid serrate seta from 



ventral side of dorsal division of the foot, x 800. 



10. Autolytus braclvycephcda (Marenzeller). Part of pharyngeal armature, 



to show the arrangement of the teeth. Greatly enlarged. 



11. Scalisetosus communis (Delle Chiaje), var. Papillae on the elytron. 



xlOO. 



12. Mystides (Mesomystides) elongata sp. n. 

 12 A. Anterior end, dorsal view, x 133. 



12 B. Anterior foot, x 200. 



12 c. Foot from mid-body, x 200. 



12 D. Setae, x 850. a = simple setae ; b and c = compound setae. 



Plate VI. 



13. Sthenelais zetltmdica Mcintosh. 



13 A. Anterior end, dorsal view, x 20. 



13 b. First foot on the left side, external view, x 42. a = dorsal cteniilium 



of first foot ; b = lateral tentacle ; c = dorsal cirrus ; d = ventral 

 cirrus ; e= buccal ctenidium. 



14. Plwloc tuberculata sp. n. 



14 a. Anterior end, dorsal view. x42. / = facial tubercle. 

 14 B. Anterior end, ventral view, x 42. /= facial tubercle. 

 14 c. Facial tubercle, x 75. 



14 D. First elytron, x 42. 

 14 E. Tenth elytron. x42. 

 14 F. Fifteenth foot, x 42. 

 14 G. Dorsal lobe of foot, viewed from above, showing arrangement of setae. 



xllO. 

 14 h. Papilla on tip of foot. 

 14 I. Compound seta from the middle of the ventral lobe of the first foot. 



x400. 

 14 K. Compound seta from the upper part of the ventral lobe of the fifteenth 



foot, x 400. 



14 l. Simple setae from the dorsal lobe of the fifteenth foot. x400. 



a = median seta ; b = lateral seta. 



Plate VII. 



15. 1'raeyeria rcmota gen. et sp. nov. 



15 A. Anterior end, dorsal view, x 56. 



