ON THE MAEINE MOLLUSCA OF MADEIRA. 



233 



On the Marine Mollusea of Madeira ; with Descriptions of 

 Thirty-five new Species, and an Index-List o£ all the known 

 Sea-dwelling Species o£ that Island. By the Eev. Robert 

 BooG Watson, LL.D., F.R.S.E., F.L.S. 



[Eead 6th May, 1897.] 

 (Plates 19 & 20.) 

 The species here described, were chiefly obtained in dredgings 

 which I carried on in Madeira between 1864 and 1874. Much 

 additional material was sent me by my lamented friend the late 

 T. Yernon Wollaston, as executor of the Eev. R. T. Lowe, who 

 dredged and collected from 1826 to 1872, when, with all his 

 treasures of botanical research, he was lost in the Bay of Biscay. 

 Some wreckage on the "French coast from the s.s. ' Liberia,' in 

 whicb Mr. Lowe had sailed for Madeira, was the only record of 

 all on board. 



In addition to these gatherings, I have carefully gone over the 

 Mollusea secured by Mr. J. Tate Johnson in bis 30 years' study 

 of the various forms of life both in the deeper and shallower 

 waters of the Madeiran sea. It is to his collection that I owe 

 the OoralliopJiaga, whicb is by far the most important of all the 

 species presented here. 



The entire list, including the 35 new species which follow, 

 extends to 382 species. 



When not otherwise mentioned, the species here given have 

 been collected by myself ; I have been careful to note the fact 

 when this has not been the case. 



List of new Species from Madeira. 



1. Cylichna spreta. 



2. Amphisphyrajlava. 



3. Philine complanata. 



4. trachyostraca. 



5. desmotis. 



6. Doridium laurentianum. 



7. maderense. 



8. Pleurohranchus Dautzenbergi. 



9. Lowei. 



10. Nassa antiquata. 



11. Murex {Ocinebrd) medicago, 



12. Trophon Lowei. 



13. Bittium depauperatum. 



14. incile. 



15. Ccecum atlantidis. 



16. Natica {Nacca) furva, 



17. Scalaria rhips. 

 ] 8. aspera. 



LINN. JOURN. — ZOOLOGY, YOL. 5XVI. 



19. 



Sccdaria Fischeri. 



20. 



Smithii. 



21. 



Aclis vitrea. 



22. 



trilineata. 



2.3. 



tricarinata. 



24. 

 25. 



Eulima fulva. 

 sordida. 



26. 



badia. 



27. 

 28. 



rhaphium. 



trunca. 



29. 

 30. 

 31. 

 32. 

 33. 

 34. 

 35. 



inconspicua. 



Odostomia omphaloessa. 



(Turbonilla) tmdata, 



Schismope depressa. 

 Montacuta triangularis. 

 Coralliophaga Johnsoni. 

 Teredo Dallii. 



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