INTRODUCTION. IX 



prepared for the use of the students attending his first course 

 of botanical lectures at Cambridge. In addition to the spe- 

 cies derived from the Catalogus, it contains the generic 

 characters taken from Ray's Methodus emendata et aucta, 

 and other books, much improved by Martyn's own observa- 

 tions. Its value now consists in its containing the whole of 

 Hay's and Dent's Appendices, although so intermixed with 

 Martyn's own remarks as to render their separation a busi- 

 ness of some difficulty. Professor J. Martyn commenced a 

 second edition of the Methodus, as we learn from his son, 

 the Rev. Professor T. Martyn; but of this, which I have 

 not seen, and of which a copy probably does not exist, only 

 a sheet and a half were printed. Prof. T. Martyn included 

 the new plants noticed in that abortive edition and others 

 recorded in manuscript by his father, to the amount of 150, 

 in his Plantce Gantabrigienses, published in 1763. Only the 

 names of the plants are given in the PI. Cantabr., and they 

 are arranged according to the Linnsean system and nomen- 

 clature. The chief value of this book is caused by the Pro- 

 fessor having added references to Martyn's Methodus and 

 Ray's Catalogus ; thus rendering those works more acces- 

 sible to the modern student. 



The Plantce Gantabrigienses records 829 " distinct sorts 

 of plants" as inhabiting Cambridgeshire. Appended to it 

 are Herbationes Gantabrigienses, in which many localities of 

 plants are recorded. 



In the same year, 1763, but three months later, Mr 

 Israel Lyons published a Fasciculus Plamtarum circa Gan- 

 tabrigiam nascentium, qua; post Rajam observatm fuere. It 

 contains 105 species, arranged after the Linnsean Method. 

 The specific characters are given, chiefly in the words of 



