xlii , PROCEEDINGS OP THE GEOLOGICAL SOCIETY. 



too well known to geologists to require any further notice at my 

 hands, and time and space woidd hardly permit me to attempt it. 



In 1831 the Greological Society of Dublin had been established. 

 Captain Portlock took a great interest in it, he was one of its 

 early Presidents, and contributed to it no less than twenty separate 

 papers, including his Presidential Addresses in 1838 and 1839. 

 When the British Association met in Dublin in 1835, Captain 

 Portlock was a Member of the local Committee and Secretary of 

 the Section of Greology and G-eography. In 1837 he also contri- 

 buted to the British Association a paper on the New Eed Sand- 

 stone of England and Ireland, and again in 1838 one on the 

 Silurian rocks in Tyrone. 



In 1843, when his labours on the Irish Survey ceased, he was 

 stationed in Corfu. He took part in the remodelling and erection 

 of the fortresses, devoted himself to the study of military science, 

 and by way of relaxation to botany and scientific pursuits. A 

 mere catalogue of the various papers written by him during his 

 residence in Corfu would be a long and tedious list. It contains 

 many papers addressed to the British Association and other bodies. 

 Amongst them, however, I may mention a short notice in a letter 

 to Professor Phillips on the geology of Corfu, forwarded to the 

 Meeting at Cork in 1843, immediately after his arrival in that 

 island. In the same year a grant was made by the Council to 

 Major Portlock for the exploration of the marine zoology of 

 Corfu. Other papers on the Natural History of Corfu he com- 

 municated to the 'Annals of Natural History.' 



In February 1844 Captain Portlock communicated to this 

 Society an account of the Wliite Limestone of Corfu and the 

 neighbouring island of Yido. He does not appear to have been 

 very successful in finding organic remains. But in the compact 

 limestone of Yido he found Terehratulce and Ammonites in abun- 

 dance, from the characters of which, some of them being apparently 

 new, he concluded that the strata belonged to the Oolitic series ; 

 and with respect to the Tertiary strata, he believed that all the 

 varieties occurred which had been found by Mr. Strickland in 

 Zante ; and that there is little doubt that the strata extend from 

 the Lower Pliocene down to Miocene, if not to Eocene. 



In 1847 Major Portlock was removed to Portsmouth. Here 

 also, amidst the duties of his profession, he found time for much 

 scientific labour. In 1848 he communicated to the British Asso- 

 ciation a paper on the evidences he had observed at Port Cum- 

 berland and the Block-house Port, of change of level on both 

 sides of Portsmouth Harbour ; and he also wrote articles on Gal- 

 vanism, on Geology and G-eognosy, on Heat, and the Appendix 

 (P) to Dr. Hyan's article on G-un-Cotton in the second volume 

 of the " Aide-Memoire." He also published a treatise on G-eology, 

 in Weale's ' Eudimentary Series.' 



In 1849 Lieutenant- Colonel Portlock was appointed Command- 

 ing Poyal Engineer at Cork, and was warmly welcomed on his 

 return to Ireland by the Irish geologists, who had not forgotten ; 



