HULL SCIENTIFIC AND FIELD NATURALISTS CLUB. 



Apion ononis Kirhy. Spurn, 



1898. E. G. B. 



Exomias peUucidns Boh. Spurn 



1898. E. G. B. 

 Phyllobius pomonce Ol. Brough. 



Nat. VI., 72. 

 Philopedon gcminatns F. Spurn, 



Withernsea. H.E.J.,T.S. 

 Barynotus obscnnts F. Com- 

 mon. 



Bavynotns elevatus Marsh. 

 Brough. Nat. 

 VI., 72. 

 Sitones sutuvalis Steph. 



Brough. Nat. VI., 72. 

 Cleonns sulcivostris L. Spurn. 



Withernsea. 

 Tanysphyrus lemnw F. Filey, 



1903. Y. N. U. 

 Poopl.agus sisymbrii F. 



ADDITIONS TO THE LIST OF THE DIATOMACE^F 

 OF THE HULL DISTRICT. 



By R. H. Philip. 



SINCE the List of Diatomaceae of the Hull District was 

 published in the Transactions of this Society for 1901, 

 a constant search has been maintained for fresh 

 additions. As was pointed out at that time, the branch of 

 the Diatomaceous Flora to which the late George Norman 

 had paid the least attention was the littoral, or sea-shore 

 species, and consequently it is not" surprising that most of 

 my new records are from this group. 



East of Cleethorpes, along the Lincolnshire coast, there 

 is an area of broad, grassy flats, intersected with narrow 

 channels, which at high water are filled by the tide and when 

 it is low become a network of mud troughs with a trickle of 

 land drainage along the bottom. The cul-de-sacs and back 

 waters of these channels have proved to be so many traps 

 for the capture and retention of floating masses of Diatoms, 

 in lumps of rusty-looking, flocculent matter. Placed under 

 the microscope, this repulsive-looking stuft" yields many 

 beautiful and interesting forms to reward the searcher, 

 among which special mention may be made of Navicula 

 abrupta, N. vacillans, A T . Scandinavica (a very fine form, of 

 which I only found a single frustule), Surirella Conn's, &c. 

 The last named species was fairly abundant, even more so 

 than S. fastuosa, to which it is nearly allied. Navicula blanda 

 A. Schm., an interesting form recorded by Cleve in the 

 North Sea, and by Peragallo in the English Channel, was 

 very abundant at Cleethorpes. 



