The Marine Mollusca of the Scottish National Antarctic Expedition. Bj' James 

 Cosmo Melvill, M.A., D.Sc, F.L.S., and Robert Standen, Assistant Keeper, 

 Manchester Museum. Communicated by Dr W. S. Bruce. (With One 

 Plate.) 



(MS. received April 24, 1912. Read June 3, 1912. Issued separately August 26, 1912.) 



PART II. 



Being a Supplementary Catalogue. 



Since we had the pleasure of working out the Mollusca obtained by the Scottish 

 National Antarctic Expedition, Dr W. S. Beuck has kindly transmitted to our care 

 some additional material, overlooked in the first instance, and taken (a) from deposits 

 from jars in which Sponges were placed ; {h) from Algse and other growths, principally 

 coming from Scotia Bay ; and (c) from a new species of Cephalodiscus. 



Of these the last, when macerated out and closely examined, produced the most 

 prolific and interesting results ; but, notwithstanding this fact, the condition of many 

 of the specimens extracted leaves much to be desired, so fragmentary and useless for 

 scientific purposes was a very large proportion found to be. A certain few, however, 

 are happily in better condition and recognisable, and, of these, we find several to have 

 been described by Dr Hermann Steebel of Hamburg in 1908, the year subsequent 

 to our first paper upon the subject being published. 



Others remain, of which over twenty do not appear to be represented in the collec- 

 tions to which we could obtain access, nor mentioned in any of the treatises yet published 

 on the Antarctic fauna. We are therefore emboldened to consider them new to science 

 in the accompanying supplementary catalogue. 



We include afresli in the list of species obtained by this expedition those already 

 catalogued in our first paper, thus rendering it as complete as possible, and signalise 

 with an asterisk (*) those which are amongst the addenda now chronicled. 



We would thank Mr Edgar Smith, I.S.O., for having examined some of the material, 

 and likewise would express our indebtedness to the Rev. Lewis J. Shackleford, Messrs 

 B. R. Lucas and J. Wilfrid Jackson, F.G.S., for having aided us in the difficult task 

 of extracting such small and fragile objects from tlie mass in which they were too often 

 almost hopelessly embedded. Mr T. Iredale has also kindly drawn up the description 

 of a new species of Cluvtopleura for this paper. 



We would only add that we have extended the Bibliographical Catalogue of the 

 Antarctic Molluscan Fauna from 1907 to 1912 at the end of this enumeration. 



(reprintkd from the tkansactions of the royal society of edinbdrgh, vol. xlviil, i'p. 33:5-366.) 



