BRITISH NUDIBRANCHIATE MOLLUSCA. 49 



4. E. coronata, For. Whitish, slender; branchiae linear, oblong, crimson reflecting blue and tipped 



with white, set in 6 or 7 clusters ; dorsal tentacles strongly annulated, with 7 or 8 rings ; 

 oral tentacles long j anterior angles of the foot a little produced. Length 1 inch. PL 12/ 

 and Appendix (20), p. vii. 



5. E. Dhummondi, Thomp. Whitish, stout; branchiae long, sublinear, reddish or brownish with 



white tips, set in 4 to 6 clusters ; dorsal tentacles densely annulated, with 20 to 30 rings ; 

 oral tentacles very long ; anterior angles of the foot much elongated. Length \\ inch. 

 PL 13, and Appendix (21), p. viii. 



6. E. punctata, A. and H. Yellowish flesh-coloured, covered with white spots ; branchiae oblong, acute, 



yellowish-brown, set in 5 or 6 clusters ; dorsal tentacles obliquely laminated ; oral tentacles 

 long; angles of the foot much produced. Length 1 inch. PL 15. 



7. E. elegans, A. and H. Yellowish-white; branchiae rosy flesh-coloured, margined above and below 



with blackish-purple, apices white, set in 7 clusters ; dorsal tentacles stoutish, corru- 

 gated; oral tentacles long; anterior angles of the foot produced. Length \ inch. PL 17, 

 figs. 2, 3, 4. 



** Tentacles smooth. Spawn of many undulating coils. Corgphella, Gray. 

 Lingual plate as in the last, with 2 separate, lateral, denticulated spines. 



8. E. rufibranchialis, Johns. White, very slender ; branchiae linear, rose-coloured with white tips> 



set in 6 or 7 clusters ; tentacles of moderate length, the oral pair shortest ; angles of the 

 foot short. Length 1 inch. PL 13. 



9. E. lineata, Lov. White, pellucid, slender, with 3 longitudinal opaque white lines on the body; 



branchiae linear, rose-coloured, with a white line in front and white tips, set in 4 or 5 clusters ; 

 tentacles with a white line on each, the oral pair longest ; anterior angles of the foot 

 produced. Length 1 inch. PL 16. 



10. E. smaeagdina, A. and H. White, slender; head short; branchiae elliptic-oblong, green with 



white tips, set in 5 clusters ; tentacles long, of equal length ; anterior angles of the foot 

 produced. Length \ inch. PI. 17, fig. 1. 



11. E. gracilis, A. and H. White, slender; head longish ; branchiae elliptical, orange with white 



tips, set in 4 or 5 clusters; tentacles long; anterior angles of the foot much produced. 

 Length \ inch. PL 18. 



12. E. pellucida, A. and H. White, slender, pellucid ; branchiae linear, scarlet with white tips, 



set in 5 or 6 clusters ; tentacles long, of equal length ; anterior angles of the foot much 

 produced. Length | inch. PL 19. 



13. E. Landsburgii, A. and H. Violet-coloured, slender; branchiae elliptic-linear, orange-red with 



white tips, set in 5 or 6 clusters ; tentacles violet-coloured, with white tips, the oral pail 

 longest ; anterior angles of the foot rather short. Length \ inch. PL 20, and Appendix 

 (22), p. viii. 



*** Tentacles with a bulbous swelling (or smooth ?). Spawn of many plain coils. 

 Favorinus, Gray. 

 Lingual plate with a single smooth spine. 



14. E. alba, A. and H. White, slender ; branchiae linear-oblong, rather depressed, white, sometimes 



spotted or ringed with brown, with white tips, set in 5 or 6 clusters; dorsal tentacles black- 

 ish-brown, white above, with a bulbous swelling; oral tentacles very long; anterior angles 

 of the foot much dilated. Length § inch. PL 21, and Appendix (23), p. viii. 



