be a synonym of the other. The statement that “ H. crispatum Bryol. 
Germ, is also removed ” may be somewhat misleading, or perhaps vague. 
It is true that it is removed from the genus Weisia for it is described and 
figured as Hymenostomum crispatum Nees et Hornsch. Not all of the refer- 
ences in Limpricht have been verified, as several of the works mentioned 
were not available. 
While investigating the references above I was considerably astonished 
to discover several errors of more or less importance on a single page of the 
Bryologia Europaea, and all in connection with the Bryologia Germanica. 
So numerous were these mistakes, though sometimes unimportant, that it 
almost seemed as if I possessed an edition of the work different from the one 
cited by Bruch and Schimper, notwithstanding the fact that a portion of the 
references were correct and that my copy bore the date “ 1823 ” on the title 
page of Theil I and also “ 1821 ” at the end of the preface. 
For the sake of brevity I will quote the lines in the Bryologia Europaea 
— page 5 of the Weisia monograph, Fasc. 33-36 (1846) — which contain the 
errors. Each pair of brackets (here inserted by the writer and not appear- 
ing in the original) inclose the corrected reference for the immediately pre- 
ceding portion. 
“ Weisia humilis , W. fallax et W. Bruchiana Nees et Hornsch. 
Bryol. germ. P. II, Sect. 2,p. 36 et 38 [p. 36, 38 et 50], Tab. XXVI et XXVIII.” 
“ Weisia controversa var. 7 stenocarpa Nees et Hornsch. Bryol. germ. 
p. 45 [Th. II, Abt. 2, p. 45], Tab. XVII [Tab. XXVII].” 
“ Weisia amblyodon Brid. Bryol. univ. I, p. 805 . — Nees et Hornsch, 
Bryol. germ. II, p/33, Tab. XXV [Th. II, Abt. 2, p. 52, Tab. XXVIII].” 
“ Weisia gymnostomoides et microstoma [These two specific names 
should be transposed, as the first reference following belongs to the second 
species and the second reference to the first species] Nees et Hornsch. 
Bryol. germ. p. 34 [Th. II, Abt. 2, p. 34], Tab. XXV et p. 52, T. XXXVII 
[p. 33, Tab. XXV].” 
“ Weisia Rudolphiana Nees et Hornsch. Bryol. germ. II, p. 33 [Th. 
II, Abt. 2, p. 31], Tab. XXV.” 
Hymenostomum subglobosum is described on page 203 in Theil I of the 
Bryologia Germanica. By typographical error this page is numbered ioj. 
It is worthy of note that this error of paging has been copied in Bridel’s 
Bryologia Universa 2 : 8 o (1827), in Mueller’s Synopsis Muscorum 1:651 (1849), 
and in Paris’ Index Bryologicus, page 1,368 (1898), although it was corrected 
in Limpricht’s Die Laubmoose 1:255 (1886). 
The writer can find no authority for the specific name mucro?iulata \ 
mentioned above. It may be an error. The combination “ Weisia mucron- 
ulaia , Schimp.” appears in an article by T. P. James in Vol. XIV (1879), p. 
136, of the Proceedings of the American Academy of Arts and Sciences. 
Both editions of Schimper’s Synopsis, however, spell the specific name 
“ mucronataB Providence, R. I, 
