MOLLUSCA OF PLYMOUTH SOUND. 197 



Sub-order 3.— HAPLOMORPHA, Lankester. 



Family — ELYSIADiE, Alder and HancocTc. 

 23. ElysiAj Bisso. 



35. E. viRiDis, Montagu. 



This interesting species was dredged in tlie estuary o£ tlie Yealm 

 in some numbers on October 20tli, 1888^ and was again obtained 

 there early in August of tliis year. This animal lives among green 

 weeds [Godium tomentosum, Zostera marina) and its general bright 

 green colour is certainly protective. The value of the " lustrous 

 specks " of blue or rose colour I have not been able to prove as yet. 

 Whatever their meaning, they will probably be found to have the 

 same value as the spots of sparkling blue on the back of ^cjirus 

 jpunctilucens. See some remarks in the Introduction. 



jPamj'Zi/— LIMAPONTIAD^, Gray. 

 24. LiMAPONTiA, Johnston. 



36. L. NIGRA, Johnston. 



Found by Mr. Heape on the Reny Rocks, February 6th, 1888. 



LIST OF SPECLA.L WORKS AND PAPERS CONSULTED. 



1. Aldee, Joshua. — A Catalogue of the Mollusca of Northumherland and Durham. 



Trans. Tyneside Naturalists' Field Club, vol. i, 1850. 



2. Alder and Hancock. — Monograph of the British Nudibranchiate Mollusca. Ray- 



Society, 1845. 



3. Bbegh, Rudolph. — Report on the NudibrancMata. Challenger Reports, Zoology, X, 



pt. xxvi. 



4. FiEMiNO, John. — A History of British Animals. Edinburgh, 1828. 



5. FoEBKS and Hanley. — A History of the British Mollusca. London, 1853. 



6. GiAED, Alfred. — Le Lahoratoire de Wimereux en 1888 : Secherches Fauiiiques. Bull. 



Sci. de la France et de la Belgique, iii« serie, ix — xii, 1888, pp. 493, 491)— 503. 



7. GossE, P. H. -A Year at the Shore. London, 1865, pp. 38—45. (Archidoris tuber- 



culata, Triopa clavigera, Facelina coronata.) 



8. Geat, J. E.— Guide to the Systematic Distribution of Mollusca in the British Museum, 



part i. London, 1857. 



9. Haddon, a. C. — Preliminary Report on the Fauna of Dublin Bay. Proc. Roy. Irish 



Acad., 2nd ser., vol. iv, No. 5, 1886. 



10. Haddon, A. C. — First Report on the Marine Fauna of the South-West of Ireland. 



Proc. Roy. Irish Acad., 2iul ser., vol. iv, No. 5, 1886. 



11. Haddon and Geeen. — Second Report on the Marine Fauna of the South-West of 



Ireland. Proc. Roy. Irish Acad., 3rd ser., vol. i, No. 1, 1888, p. 39. 



12. Heedman, W. a. — Report on the Nudibranchiata of the L.M.B.C. District. First 



Report upon the Fauna of Liverpool Bay and the Neighbouring Seas. London, 1886. 



