I860.] REVIEWS. 183 



tainly showed the variety of the petrifaction, but not the dimen- 

 sions of the blocks," 



The next work which has any bearing on the subjects to wliich 

 our space is devoted, is 'Three Visits to IMadagascar; by the 

 Eev. Wm. Ellis.' This indefatigable missionary and traveller 

 discovered and brought home many rare and exquisite plants, 

 among which we notice the following rare and beautiful Orchids, 

 Angrcecum superbuni and A. sesquipedale ; also the curiously- 

 leaved plant so well known by woodcuts in elementary works on 

 botany, Oiwirandra fenestralis, the lace-leaf plant of Mada- 

 gascar. The leaves of well-developed plants examined by Mr. Ellis 

 in Madagascar, did not exceed ten inches in length ; a size at 

 least equalled by plants grown in this country. Great numbers of 

 Urania speciosa, Traveller's-tree, were seen. " On the way to 

 the capital, much lovely scenery presented itself, and many fine 

 orchids [Dendrobia and Angrmca) were, with other plants, col- 

 lected. Gigantic Acacias grew by the waterside, while in the 

 lakes floated hundreds of the blossoms of the beautiful Nym~ 

 pliosa cmrulea. "But," the revicAver very considerately says, 

 " we send our readers to the work itself, if they wish to read of 

 the great magnitude of the trees and the great beauty of the 

 flowers." 



Note. — The reviewer writes Dendrobii and Angreeci, A?e sup- 

 pose, in the genitive case, the term species being understood. 

 A liberty has been taken in writing these two generic names in 

 the plural as above. 



On page 514, etc., there are descriptions of some new genera 

 and species discovered in the colony of the Cape of Good Hope, 

 viz. Mackaya bella, of the Natural Order Acanthacea, Ceropegia 

 Boivkeri, both described and named by Dr. Harvey. There are 

 illustrations of these plants in the Review. 



Several contributions to Irish Lichenology follow, embracing 

 descriptions of Lecidea, and forty-six species are enumerated, 

 described, and illustrated. In a continuation, the genera Graphis, 

 Ach., Opegrapha, Ach., Stigmatidium, Mey., Arthonia, Ach., 

 and Chiodecton, Fee, are similarly described and illustrated. 



