218 Drs Hooker and Greville on the Genus Calymperes 



Dr MacCulloch notices it as a curious variety, while Dr Hib- 

 bert has identified it with the quartz-rock of Shetland. 



*** Mr Andersons Account of the Geographical Distribu- 

 tion of the Qicartz-rock, and of the bituminous strata associated 

 with the Sandstone, xoill be given in our next Number. 



Art. IV. — On the Genus Calymperes of Swartz and Syrrho- 

 podon of Schwacgrichen, of the Order Musci. By W. J. 

 Hookkr, LL.D. F.R.S. &c. &c. Regius Professor of Bo- 

 tany in the University of Glasgow, and R. K. Gkeville, 

 LL.D.F.R. S. E. &c. &c. Communicated by the Authors. 



In noticing under the same head the two genera above men- 

 tioned, we are influenced by their great similarity in habit, 

 and by the circumstance of both having been previously con- 

 sidered as belonging to one genus, that of Calymperes. 



The genus Calymperes was instituted by Dr Swartz ; and, 

 as it appears, published for the first time at Kiel, in the year 

 1813, in the Tabula Muscorum Frondosorum of Weber ; but, 

 as we do not possess that table, we are not aware what charac- 

 ter was there ascribed to it, or what species, if any particular 

 one, was there described. In the year 1816, our friend Dr 

 Schwaegrichen published the genus in his Mantissa Gcnerum 

 aliquot Novorum, attached to the second part of the first sup- 

 plement to the " Species Muscorum,'''' simply with the charac- 

 ter, " Peristomium nullum, thecae orificio membrana spon- 

 giosa tecto. Flores terminales dioici ;" and describes under 

 it two new species, C. lonchophyllum, and C. Palisoti. 



In the year 181S, there appeared in Sprengel and Schro- 

 der's " Jahrbiicher der Gewachskunde," Dr Swartz's paper, 

 with an excellent account of this genus, under which the C. 

 Afzelii is described ; and there we find the following generic 

 character. " Peristomium nudum. Calyptra carinata, persis- 

 tens, infra sporangium constricta, apice circa operculum (ma- 

 turitate solutum) rimis longitudinalibus hians." 



About the same time, but without being aware of the me- 

 moir last mentioned, Dr Hooker published in his Musci E.vu- 

 tici, what he then considered, from the remarkable habit of the 



