290 Proceedings of the Eoyal Physical Society. 



(4.) The wide distribution of Acanthoclrilus in tlie land 

 masses of the Southern hemisphere, which agree in the great 

 abundance of species of this genus and comparative rarity of 

 other forms. 



(5.) The marked difference between JSTew Zealand and 

 Australia. 



Explanation of Maps. 



PI. XIII. The distribution of the Acanthodrilidse is shown in red. 



PI. XIV. The dots indicate the areas occupied by the Eudrilidae.^ The cross 



lines indicate the areas occupied by the Perichetida. The dark red 



patches show when both families occur. 



XXVI. Notes upon the Marine Accumulations in Largo Bay, 

 Fife, and at Portrush, County Antrim, North Ireland. 

 By Alfred Bell, Esq., London. (Communicated by 

 James Bennie, Esq.) 



(Read 15th January 1890.) 



Largo Bay, Fife. 



Shortly before leaving London for Australia, Mr Eobert 

 Etheridge, jun., a former president of this Society, suggested 

 to the writer that if ever opportunity served, a further 

 examination of the fauna in the raised beds near the Cockle- 

 mill Burn in Largo Bay would be desirable, as the list of 

 species recorded by him in his paper upon these deposits, 

 read before the Eoyal Physical Society, Edinburgh, vol. vi., 

 p. 105 (1881), only embraced the larger forms. At a later 

 period, thanks to the kindness of Mr J. Bennie, who had 

 worked with Mr Etheridge, the smaller matter and floatings 

 came into my hands, and from these and a second parcel 

 from the same gentleman, and material obtained on a personal 

 visit, the appended lists have been compiled. 



The physical features of the deposit have been so carefully 

 and thoroughly described by Mr Etheridge, that little can be 

 added. On my visit the driving sands had partly obscured 

 the face of the section, but not so far as to obliterate the 

 traces of current bedding and lamination. 



Agreeing with my friend that its origin is marine rather 



^ I have not referred in the text to the occurrence of two new genera of 

 Eudrilidse which I have just received from Lagos, W. Africa. 



