462 E. RAY LAKKESTRR. 



Ethusina Challengeri, E. I. Miers. 



"Challenger". . . . 1875 fathoms. 



" Albatross," Pacific . . . 2232 „ 



Ethusina gracilipes, E. I. Miers. 



"Challenger". . . . 1425 



"Albatross," Pacific . . 1322—1823 



Ethusina Talismaui, E. Milne-Edwards and Bouvier. 



" Talisman " . . . . 2235 metres. 



" Princesse-Alice," 1897 . . 1935 



EXPLANATION OF PLATES 33 & 34, 



Illustrating Prof. Ray Lankester's memoir on 

 " The Eye Peduncles of Cymonomus." 



Reference Letters. 



«'= Aiitciinule. «'*= Basal articulation of same, a" = Antenna, e^ Eye- 

 stalk (ocular peduncle). ?■ = Rostrum. 5/) = Extra-orbital sjiiue or process 

 of tlie carapace, x = Small scale, probably an abnormality. 



Fig. 1. — Cymonomus Normani, u. sp. Male specimen, showing (he 

 modified rostrum and eye-stalks. 



ElG. 2. — Cymonomus granulatus, Norman. Male specimen, showing 

 the normal rostrum and eye-stalks. 



Fig. 3. — Abdomen of male C. granulatus. 



Fig. 4. — Abdomen of female C. granulatus. 



Figs. 5 and 0. — Eye-stalks of C. granulatus. 



Fig. 7. — Frontal region of C. granulatus further enlarged. 



Fig. 8. — Frontal region of C. Normani further enlarged. 



I'IG. 9. — ^laxillipede of third pair of C. granulatus. 



Fig. 10. — Eye-stalks and rostrum of a female specimen of C. Normani. 



Fig. 11. — Eye-stalk and rostrum of a second male specimen of C. Nor- 

 mani. 



Fig. 12. — Antennule and antenna of C. granulatus. 



Fig. 13. — Part of antennule of C. granulatus further enlarged. 



