THE FLORA OF HALIFAX. 179 



[Weisia Yerticillata, Brid. (By yum verticillatum, L.) 



1775. — /. Bolton. Not since recorded. 



The fact that this moss is mostly found on dripping limestone 

 rocks, and only occasionally on sandstone, provides reason- 

 able room for considering that this record may be an error ; 

 but seeing that it is "occasionally found on sandstcne," 

 and is " not uncommon," it would be unsafe to say point 

 blank that it is one. Unfortunately, Bolton left no local- 

 ities for his mosses, or the place might be specially 

 searched. Thirteen decades allow ample time for many 

 things to disappear in a thriving district.] 



Trichostomum tortuosum, (L.) Schrank (Bryum tortuosum, L; 



Mollia tovtuosa, Schrk ; Barbula tortuosa, W. & M.) 



Keb Clough, Todmorden. — T. Stansfield, Lees' Fl. 



[Cinclidotus fontinaloides, (Lamrk) P. Beauv. 

 1775. — J. Bolton, under Fontinalis minor, L. Possibly Bolton's 

 plant was Fontinalis squamosa ; this is still very plentiful in 

 the clear streams, and is not included in his catalogue 

 along with F. antipyretica. There is no other record of 

 this species in the Calder district.] 



ENCALYPTACEJE. 

 [Encalypta vulgaris, Hedw. (Bryum extinctorium, L.) 

 1775. — /. Bolton. Not since recorded, and doubtful, for it is 

 mostly, but not strictly, confined to limestone districts.] 



ORTHOTRICHACE.3E. 



Zygodon Mougeottii, (Brid.) B. & S. (Gymtostomum, Bruch ; 

 Amphoridium, Schp.) 



1854. High Greenwood, Heptonstall. — Supp. 



1898. — High Greenwood; Lumb-falls, Crimsworth Dean. — - 

 J . Needham. Since found to be frequent in the higher 

 reaches of Hebden Valley. 



Zygodon Yiridissimus, (Dicks) Brown ; Gymnostomum viri- 

 dissimum, Sm.) 



1840. Old wall at Harley Wood. — /. Nowell, Baines' Fl. ; 

 Herb. Ley I. This record has been omitted from all subse- 

 quent Yorkshire Floras. 



[Olota Ludwigii, Brid. 

 1840. On trees, High Greenwood. — S. Gibson, Baines 1 Fl, 

 Not recorded for this district in any subsequent flora.] 



