228 ADDENDA TO VOL. I. 



Since this was written a large monograph l has been published, in 

 which the Portuguese floras receive a full and careful treatment ; 

 this work is of considerable scientific importance, and its value 

 is enhanced by the fact of its being the last important contribution 

 to palseobotany by that indefatigable worker whose loss is so deeply 

 deplored. 



Beginning with strata of infra-Liassic age, Saporta describes a 

 number of plants from beds referred to the following geological 

 horizons : Mveau de Sinemurien (Couches a Grypheea obliqua), 

 Niveau du lusitanien, Niveaux du neo-jurassique (Couches a Lima 

 alternicostata, pterocerien et portlandien), Niveaux infra-cretaciques 

 (du valanginien a 1'aptien et de 1'urgonien a 1'albien). In summing 

 up the characteristics and affinities of the neo - Jurassic floras, 

 Saporta draws attention to the occurrence of species characteristic 

 of the Corallian and Kimmeridgian, and associated with these he 

 recognizes various "Wealden types such as occur in Northern 

 Germany, the Carpathians, and in North America. To discuss at 

 length the numerous points suggested by this extremely valuable 

 memoir, would take us far beyond the limits of the present work, 

 but some portions of the monograph more immediately germane 

 to our present subject must be briefly dealt with. In looking 

 through the excellent plates, we find a large number of very small 

 specimens referred to a great variety of species, and on examining 

 the evidence on which many of the determinations are based, it 

 would seem that the number of specific names might well be 

 considerably reduced. 



NEC-JURASSIC SPECIES. 



Sphenopt&ris dissect if oli a, Sap., p. 19, pi. iii. fig. 9; pi. viii. fig. 2; 



and pi. x. fig. 9. 



Saporta notes a resemblance to the "Wealden species Ruffordia 

 Gopperti (Dunk.) ; we may also draw attention to a resemblance 

 with OnycMopsis elongata (Geyl.). 



S. maryinata, Sap., p. 20, pi. viii. fig. 6. While recognizing 

 the striking agreement of this fern with Onychiopsis Mantelli 

 (Brong.), Saporta prefers to consider it a distinct type. It is 

 impossible to be quite certain as to the precise nature of the 



Saporta (1). 



