20 MITKA. 



261. fulva (f. 241, 615), Sivainson. — M. attenuata is only 

 a shortened variety of this. 



262. fulvescens (f. 452), Swainson. 



263. cmtYSOSTOMA (f. 95*, 96*), Swainson. 



264. digitalis (f. 207), Chemnitz. 



265. coeonata (f. 217-220), Chemnitz. — "We give the 

 principal varieties of this well-known species, but think that 

 the narrow form, with dark border markings between the 

 aculeations of the whorls may fairly be distinguished as sp. 

 266. 



266. tiarella (f. 56, 215), Swainson. 



267. floeidula (f. 283, 611), Soirerbij. — M. coronatce 

 simili, sed costis latis, spiralibus, et sulcis profunde punctu- 

 ratis. — Keseinbliug M. corunata, but with broad spiral ribs 

 and deeply punctured grooves. 



268. aurora (f. 223), A. Adams. — More fusiform and 

 acuminated than M. coronata, almost smooth in the middle 

 of the whorls. 



269. lugubris (f. 199, 200, 201), Swainson— Only the 

 dark variety is figured in Reeve, but the orange variety, 

 although rather more closely sculptured, can hardly be 

 separated. 



270. coriacea (f. 564), Reeve. 



271. Uzzielana (f. 455), Crosse. — May possibly be a 

 variety of M. lugubris, although muchjnore finely grained. 



272. aurantia (f. 250, 251, 260), Omelm.— Specimens 

 vary in the number and thickness of the ridges. 



273. limbifera (f. 261, 262), Lamarck. — Smoother, and 

 much more finely ridged than M. aurantia. 



274. Michelini (f. 259), Petit.— With broad flat ribs 

 between the grooves. The upper half of the shell whitish. 



275. planirilata (f. 663), Reeve. — Possibly the same as 

 M. Michelini, but different in form, and dark-coloured all 

 over. 



