706 



Proceedings of the Royal Irish Academy. 



DESCRIPTION OF THE PLATES. 



d.a.. 



dorsal antenna. 



F.B.N., 



. DrawE 



by Mr. F. Dixon- 



d.s., 



dorsal spine. 





Nuttall. 



La., . . 



lateral antenna. 



W., . 



. Drawnby Mr. "Western. 



l.k., 



lateral knob. 



J.H., . 



»j 



,, the author. 



I.S., . 



lateral spine. 



C.R.., . 



5> 



,, Mr.C.Eousselet 



r.h. 



frontal horns. 



W.T.C., 



>j 



„ Mr. W. T. Cai- 

 man. 





Plate XXI. 







J nartlira aptera, 'Kood. Lateral view. 1«;, dorsal view. 13, do. 



in the contracted state. Figs, la, li, are taken from my 



paper in the Journ. of the Quekett Club., October, 1893 



(J.R.). 

 Cyrtonia tuba, = JVotommafa tuba, Ehr. Yentral view. 



2a, lateral view {F.D.N.). 

 Eosflwra elongata, Ehr, Dorsal view. Za, lateral view. 



Zb, diagrammatic transverse section. 3c, mastax, dorsal 



view, ^d, do., lateral view {F.D.lSf.). 



Plate XXII. 



4. Rattulus bicornis, "Western. Dorsal view. 4:a, lateral view. 



5. Polychaetus collinsii, Gosse. Dorsal view {J.H.). 



6. Polychaetus subquadraius, Perty. Dorsal view {J.H.). 



7. Pterodina btdentata,Tenietz. l.k., lateral knobs on lorica (t/".^.). 



8. Notholca spinifera, Hood. Dorsal view. 8a, dorsal antenna 



{d.a.) in front view, highly magnified. 85, do. in side 

 view. I.S., lateral spines, folded {F.D.N.). 



9. Ploesoma lenticulare, Herrick. Lateral view. 9 «;, Dorsal view. 



r.h., retractile fleshy horns {C.R.). The hexagonal sculp- 

 turing present over the whole lorica is shown only on a 

 portion of the lateral view. 

 10. Fuchlanis subversa, Bryce. Dorsal view. IQa, Lateral view 

 {W.T.C.). 



