112 REVIEW. [M(iy, 



111. Onialia tricJtomanoides, Brid. With old fruit on banks 

 near Douglas. 



112. Neckera complanata, B. and S. On an Ash-tree in the 

 ruins of Kirk St. Trinian^ near St. John's. 



113. Fontinalis squamosa, Lin. With fruit in Glen Laxey; plen- 

 tiful. In Peel Water, and the stream near Castletown. 



TJiirsk, YorksMre, September-, 1856. 



On the Flowering Plants and Ferns of Oxfordshire and the con- 

 tiguous Counties. By M. T. Masters, Lecturer on Botany at 

 St. George's Hospital, London, etc. etc. Printed for the Ash- 

 molean Society. 



This interesting brochure (a single sheet in octavo) contains, 

 as preliminary matter, an explanation of the principles on which 

 the six Tables are constructed. These Tables may be considered 

 as the general results of the whole. The district is nearly equiva- 

 lent to Mr. Watson's sub-province of West Thames, which in- 

 cludes the counties of Berks and Bucks, in addition to Oxford- 

 shire. The Author however states, that his remarks are applic- 

 able only to the immediate neighbourhood of Oxford, except 

 where otherwise expressed. 



The native plants are (see Table I.) 728. The denizens, or 

 now thoroughly-established plants, Avhich are supposed to have 

 been introduced at some remote period, are 29, — a very mode- 

 rate estimate. The colonists, or weeds found in cultivated fields, 

 are 31. The aliens, either prestimed or known to have been in- 

 troduced at a recent period, are 59, — a large proportion, as se- 

 veral of the colonists and even denizens may be classed under 

 the same category ; the only difference being, that the denizens 

 were introduced at an earlier period than the aliens. In process 

 of time the aliens will become denizens, and the latter will pass 

 into the class of natives. If an existence of three or five centu- 

 ries entitles a plant, or a class of plants, to the title or claims or 

 privileges of a denizen or denizens, it may be presumed that all 

 the aliens, if they maintain their settlement, will, in the course 

 of from three to five centuries, take a higher civic rank among 



