226 Proceedings of the Royal Irish Academy. 



DESCEIPTIOX OF PLATES XVII.-XIX. 



The specimen of Cae-siciiTus iieglectus used for figs. 1, 2, 5-7, are from 

 Station A. 124; for figs. 3, 4, 12, from Station W. 11-5 ; and for figs. 8-10 

 from Station W. 119. The material of Nicoma<:lie maculata that has supphed 

 the basis for the figures dealing there vrith is from SteUa Maris Bay, Howth. 



The ciphers standing to the left of the figures give the numbers of the 

 setigerous segments ; the ciphers to the right give the magnification. 



" Glands " indicates that the epidennal glands, coloured with iodine green, 

 are given in the figures referred to. 



Plate XVH. 



Caeswirms Tieglectus n. sp. 

 Fig. 



1. Anterior region seen from beneath. Glands. 27 : 1. 



2. Anterior region. Glands ; the same indi\'idual as the preceding. 16:1. 



3. Setigerovis segments 7-10, seen from beneath. Glands. 9 : 1. 



4. Section in front of the first setigerous segment, from beneath, with ocelli 



20 : 1. 



5. Anterior region seen from above. Glands. Same individual as fig. 1. 



27: 1. 



6. Setigerous segments 7-8, seen obliquely from above. Glands. Same 



individual as fig. 1. 22 : 1. 



7. Head from the side ; sketch without colour. Same individual as the 



forgoing. 27 : 1. 



8. Posterior region seen from the left side. Glands. 27 : 1. 



9. The same section as in. the preceding figure,^ seen from above. Glands. 



24: 1. 



