COSMARIUM. 19 



the two lateral undulations more prominent than in 

 the type, especially the upper one which is sometimes 

 very pronounced, with the actual apex considerably 

 narrower, somewhat protracted, and slightly convex; 

 basal angles subrectangular, apical angles scarcelv 

 eviclent (very much rounded). 



Length 38-50 /*; breadth 22-29 ^ ; breadth of isth- 

 mus 8-10 p, ; thickness 16-19 //,. 



ENGLAND.- -Near Keighley, Cockett Moss, near 

 Griggleswick, Cam Fell, and Penyghent, W. Yorks ! 

 Mickle Fell, N. Yorks ! Pike of Bliscoe and Helvellyn, 

 Westmoreland ! 



WALES. Capel Curigand Yr Orsedd, Carnarvonshire ! 



SCOTLAND . Aberdeen, Kincardine, Forfar !, Perth!, 

 Argyll (Roy $ Bissett). Moidart, Inverness ! Kirkcud- 

 bright ! Shetlands ! 



Geogr. Distribution.- -France. Germany. Galicia. 

 Austria. Sweden. Faeroes. Greenland. United States. 



This variety is much more generally met with than the 

 typical form, associated with C. notabile, C. speciosum, 

 C. anceps, C. Holmiense } and certain other subalpine species, 

 which occur among the Mosses and Myxopliyceae of dripping 

 rocks and mountain springs. It is somewhat variable in the 

 prominence of the lateral undulations of the semicells, 

 especially of the upper one, which sometimes distinctly pro- 

 jects. A form mentioned by Schmidle (' Alg. Geb. Oberrheins/ 

 1893, p. 549, t. 28, f. 6) possesses a minute tooth on each 

 semicell immediately above the isthmus, but Schmidle's 

 remark " angulis superioribus acutioribus, fere protractis ' 

 (in which he really means the superior lateral undulations) 

 applies to the great majority of specimens of this variety. 

 Grutwinski has found Schmidle's form in Galicia and has 

 named it " var. Lundellii forma Schmidlei' (vide Gutw. 

 'Wykaz. Glonow Wadow.-Makow/ 1897, p. 142). 



Var. heterocrenatum var. rtov. (PL LXVI, fig. 22.) 



Sides of semicells with six crenations (including the 

 basal and apical angles), of which the three lower ones 

 are much smaller than the three upper. 



Length 34 /x; breadth 23 /x; breadth of isthmus 10*5 p.. 



