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ON THE MOLLUSCA PEOCURED DURING THE "PORCUPINE" 

 EXPEDITIONS, 1SG9-1870. SUPPLEMENTAL NOTES, PART I. 



By E. R Sykes, B.A., F.L.S. 



Read llth December, 1903. 



PLATE III. 



It will be a familiar fact to students of the Mollusca that Dr. Gwyn 

 Jeffreys passed away, in 1885, ere the completion of his work on the 

 "Porcupine" Mollusca, and that part ix was seen through the press by 

 Mr. E. A. Smith. 



In the present paper I commence a supplement to his work, and 

 dealing firstly with the genera which he did not consider, I propose 

 subsequently to endeavour to give additional details relative to the 

 residue of the Mollusca. When Jeffreys commenced his work much 

 of the material was un sorted, and therefore there remains a good deal 

 of information to be given. 



The dredgings were divided by Jeffreys between himself and 

 Mr. J. T. Marshall ; at Jeffreys' death a large portion of this part of his 

 collection was acquired by the British Museum, together with all his 

 manuscript notes relating to it, and recently Mr. Marshall's collection, 

 worked out with the most painstaking care, has passed into my hands. 

 Mr. Marshall has most generously presented me with his interleaved 

 copy of the "Porcupine" reports, and a quantity of valuable notes 

 made by him with a view to a supplement being written, and Mr. Smith 

 has placed Jeffreys' manuscripts at my disposal. My task, therefore, is 

 rather that of an editor than of the writer of an original work, and 

 while I take full responsibility for all statements herein contained, it 

 must be borne in mind that the more valuable portions of the work 

 are due to those by whose labours I have profited. Where possible, 

 I have endeavoured to acknowledge in the text on whose authority 

 the statements are made. 



Some difiiculty has arisen in chronicling the ISIuseum collection 

 owing to the fact that at Jeffreys' death his material was not fully 

 prepared for detailed labelling. Much information no doubt remained 

 unwritten, and he appears to have been in the practice, probably for 

 his own convenience, of recording on the boxes, not only the station 

 from which the specimens came, but also other localities where the 

 species was found. In the case of one of the Bullidse, for example, 

 a box containing one specimen bears three station numbers. I have 

 endeavoured rather to err on the side of omission than to give stations 

 as to which I feel any doubt. 



I have not attempted to give a very full synonymy, but have 

 referred rather to monographs, etc., where this may be found. In 

 addition to the shells now catalogued, there are a few species which 

 I regard as being, in view of the fact that they are either broken or 

 in very bad condition, for the present indeterminable. Specimens in 



