MET.VILT. : THOMAS ROGERS. I43 



Later in life he took up keenly the study of the moUusca, 

 especially non-marine, and about 1870 was fortunate in discovering 

 Hyalinia glabra Studer, in Marple Wood, and also Planorbis dilatahis 

 Gould, a North American species, possibly adventitious in the 

 Pendleton Canal, but neither of these species had before been 

 recorded for Great Britain or Ireland. These discoveries were the 

 means of opening a correspondence Vv^ith Dr. Gwyn Jeffreys, F.R.S., 

 and other leading malacologists. 



Still later on he began to exchange largely, especially in shells, 

 mosses, and ferns, with numerous botanical and geological friends in 

 the Hawaiian Islands, Tasmania, Australia, New Zealand, and other 

 countries, and consequently acquired in time very extensive and well- 

 named series, mostly in very good condition. It is with his concho- 

 logical studies we have more particularly to do, so I would briefly 

 point out that his series of British land and freshwater mollusca is 

 almost complete, and abounding in good varieties, while his exotic 

 collection excels in special groups, e.g., Japanese Helices and Clausilice, 

 Hawaiian Achatinellce, Tasmanian species, etc. In marine shells, his 

 Cyprma will be especially remembered, so many specimens of this 

 genus have been exhibited by him from time to time at the meetings 

 of the Society. Two species of shells, the terrestrial E?mea rogersi, 

 M. and P., a well-marked form from Natal, and the marine Clathurella 

 rogersi, M. and St., from Lifu have been named in his honour. 



Personally, I have the pleasantest recollections of many an evening, 

 during the past thirty years, that Rogers spent at my house, whither he 

 would often repair either to try and name the various fresh shells he 

 had obtained, or, at times, ferns and other plants. He was exceedingly 

 accurate and punctilious as to determinations, never satisfied at once, 

 or with a mere cursory examination. Pie always required proof as to 

 a locality. 



He was also a charming companion on an excursion, always full of 

 information and intellectual energy. Mr. E. Collier writes, particularly, 

 of one visit to Cardiff in 1878, the especial quest being Helix villosa, 

 reported from the neighbourhood as naturalized, and I remember a 

 very pleasant afternoon with him in 1870, shortly after I came to reside 

 in the North of England, when we visited Marple Wood, and found 

 plenty of Hyalinia glabra Studer. 



He was a voluminous letter writer, and some of his communica- 

 tions are very characteristic. 



I may add that I have come into posession ot the whole of his 

 botanical collections, especially rich in Cryptogamia, British and 

 exotic, and it is believed his shells will be disposed of privately. 



