480 Corresjjondence — Mr. J. E. Marr. 



marine fauna of the north-east of Ireland agree in the main 

 points with those which I arrived at from an independent inquiry 

 into the origin of the terrestrial fauna of that island. 



"From the careful study of terrestrial faunas, has been gained 

 not only the knowledge of the changes of climate which have 

 passed over the world, but, in the main, those geographical 

 revolutions which have been produced in North Europe in recent 

 geological times. I trust that I have succeeded in strengthening the 

 old Lyellian theory on the origin of the Glacial period, which has 

 received such strong support from no less an authority than Lord 

 Kelvin." 



coI^I^Es:pol^^^D:E:^:^^OE. 



TEINUCLEUS SETICORNIS. 



Sir, — It is interesting to read two remarks occurring in successive 

 numbers of your Magazine. In the August number (p. 379) I wrote : 

 " If Mr. Eeed will turn to my Sedgwick Essay .... (pub- 

 lished in 1883) .... he will tind Trinucleus seticornis recorded 

 as a Middle Bala fossil in North Wales, the Lake District, and 

 Scandinavia, and nowhere recorded in the Upper Bala list." 



In the September number (p. 427) Mr. F. E. C. Eeed writes : 

 "He [Mr. Marr] mentions in his criticism of my remai'ks that in 

 1883 he had stated that this species was nowhere found in the 

 Upper Bala." 



I nowhere mention that I have made this statement, and I never 

 did make it. In 1883 Trinucleus seticornis had not been discovered 

 in beds recognized as Upper Bala, and naturally I could not record 

 it, but made no statement concerning its absence in Upper Bala 

 rocks. In 1885 it had been discovered, and the discovery was then 

 mentioned by Mr. Eoberts and myself. Mr. Eeed accuses me of 

 a mistake, because in 1883 I did not record an undiscovered fossil ! 

 He ignores the essential point of my letter that Trinucleus seticornis, 

 which he states (Q.J.G.S., vol. liii, p. 90) to be a characteristic Upper 

 Bala fossil, is abundant in the Middle Bala beds. J. E. Maer. . 



Cambridge, September 23, 1897. 



nVCISOEXiXi-A-n^TEOTTS. 



The Forest-Bed of the Norfolk Coast. — This interesting 

 deposit, so rich in organic remains, has been carefully worked for 

 more than twenty years by Mr. A. C. Savin, of Cromer, who during 

 that period had accumulated about 1,900 specimens of Vertebrata, 

 many of which had been described and figured by Mr. E. T. 

 Newton, F.E.S., Prof. Leith Adams, Prof. Lankester, F.E.S., and 

 others. Mr. Savin's collection has just been acquired by the British 

 Museum (Natural Histoi'y), where it will be preserved for all time, 

 and form a most unique and valuable addition to our National 

 Museum, as well as add greatly to our knowledge of the fauna 

 of this old Pliocene land-surface. 



