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XIII. The Foraminifera of the West of Scotland. Collected by Prof. W. A. Herdman, 

 F.R.S., on the Cruise of the S. Y. ' Bum,' July-Sept. 1913. Being a Contribu- 

 tion to ' Spolia Buuiana.' By Edward Heron-Allen, F.L.S., F.Z.S., F.B.M.S., 

 and Arthur Earland, F.R.M.S. 



(Plates 39-43 and Map.) 



Read 4th November, 1015. 



Introduction. 



THE cruise of Professor Herdraan's Steam Yacht ' Runa ' for the year 1913 provided 

 us with twenty-five bags of Eoraminiferous material, both dredgings and shore- 

 sands, collected by Miss Catherine Herdman between the 10th of July and the 

 3rd of September. In addition, there were a few small samples of mud washed from 

 Invertebrata which had been preserved in alcohol. 



The original intention of the Collectors was to supply us with a series of samples 

 linking up in some measure our Clare Island (W. of Ireland) material and the 

 dredgings of the International Fisheries Commission (Scotland) Cruiser ' Goldseeker,' 

 for the purposes of the ' Monograph of the British Recent Eoraminifera ' upon which 

 we are engaged. The examination of the first four samples in Register (not Geo- 

 graphical) order, however, made it clear to us that we were confronted with an extremely 

 valuable series of gatherings, which would add many important records to the list of 

 hitherto-identified British species, and we consequently laid our other work aside and 

 devoted the period from October 1913 to November 1914 to the examination of the 

 material with a view to the production of this Monograph, regarding it as an important 

 contribution to our larger work. 



The results have amply justified our anticipations, for, though we only record one 

 (?two) species and one (?two) varieties new to Science, no less than twenty-seven species 

 are now recorded for the first time from the British Area *, whilst a very considerable 

 number make their appearance for the second time only, in a British List. The total 

 number of species and varieties identified in the gatherings is 324. The material 

 consisted, with the exception of the small samples in spirit, of dried fine sands and 

 muds, without, as a rule, any notable admixture of shells or stones. Had these been 

 present in any quantity we have no doubt that the list of normally adherent arenaceous 

 and other forms might have been considerably extended. The dredgings, again, were 

 made in comparatively shallow waters, the greatest depth being 60 fathoms (at Stns. 16 

 and 21), which accounts for the absence of many deeper-water forms which might 

 have been expected from the area. 



The bags were filled with great discretion by Miss Herdman, whenever the material 



See note on p. 204. 



SECOND SERIES. — ZOOLOGY, VOL. XI. 



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