52 THE BRACHIOPODA. 



else. Dr. Hass quotes it from Uhrweiler and Nuelhausen, in 

 Alsace ; Xocourt and Luppy, in Lorraine ; also Essey and They 

 (Meurthe and Moselle). 



Obs. This species seems properly to belong in this district to 

 the zone of Jurense, which zone is outside the area embraced by 

 this paper. I, however, note it here from the fact of its being 

 found (but very rarely) in the lowest bed of the Bradford Abbas 

 quarry. This bed is a very hard blue centred stone, chiefly 

 composed of comminuted shells, and resembling the bands of 

 stone in the sands. Below it come the yellow sands, and above 

 the zone of Murchisonae. I think it not improbable that this 

 " bottom layer " really belongs to the jurense zone also, and that 

 the zone of opalinum, which is so well and distinctly marked at 

 some other places, is here entirely absent. 



Mr. Davidson wishes me to state that, when he wrote his 

 paper for the Dorset Field Club in 1877, he described all the 

 species then known to him from this district, and that the others 

 have been discovered since. 



COKKIGENDA. 



Page 6, line 24 from top, for subdecorate read subdecorata. 

 ,, 6, ,, 28 ,, for von Such read von Bucli. 

 ,, 6, ,, 32 ,, Rhynch. Dundriensis does not occur 



at Half- Way House. 



7, ,, 29 ,, for Davidsoni read Leesii. 

 ,, 7, ,, 2 from bottom, for von Such read von Buck. 

 ,, 9, ,, 15 from top, for Kehlread Hehl. 

 ,, 9, ,, 18 ,, erase the second cross. 

 ,, 9, ,, 25 ,, for Stuitensis read Stuifensis. 



