414 Prof. T. R. Jones on the 



these memoirs on the Silurian species in Messrs. Vine's and 

 Smith's collections (see Ann. & Mag. Nat. Hist, for April and 

 May 1886, and March 1887), the number of the specimens of 

 those species described or redescribed in 1886 are here given, 

 together with the emendations required as to their special 

 strata. Thus : — 



Errata. 



In the " Notes on the Palaeozoic Bivalved Entomostraca, 

 No. XX.," Ann. & Mag. Nat. Hist. April 1886 :— 



At page 353, add for var. intermedia : LiVjj (lost). Bed no. 87. Buildwas 

 Beds. 

 855, /or xLiVj, read lxiVj^, ^j. Buildwas Beds. 

 858, add for Maccoyiana : XLVi. Bed no. 25. Tickwood Beds. 

 301, delete Lxii under bicoUina. 

 862, add for unijiexa : Lxn. Bed no. 22. Buildwas Beds. 



In the " Notes, &c.. No. XXI.," May 1886 :— 



At page 409, under humUis, delete Lxni. Bed no. 25. And /or LXiv read 



Liv. Bed no. 37. 

 410, add for valida : LXiii. Bed no. 25. And delete lxv,2. 



Shales over tlie Wenlock Limestone. 

 410, under tersa, read no. 77 Dudley, instead of no. 78 Dudley. 

 413, under seviimdum, delete no, 2G, railway-cuttiog, side of 



Severn, Ironbridge (worn). 



The number of the Specimens. 



Number of the speci- 

 Genera and Species. mens in the collections. 



( ; ^ \ 



Vine. Smith. 



Beyrichia tuberculata (Klceden) (foreign). 



, var. gibbosa, Renter 1 



Klcedeni, M'Coy (varieties, as follows): — 



, var. granulata, Jones 10 7 



, var. nuda, Jones 1 1 



, var. antiquata, Jones (Jones's collec- 

 tion J. 



, var. intermedia, Jones I . „ 



, subvar. subspissa, Jones ^ Hall . . . . j 



, var. subtorosa, Jones 2 33 



, var. torosa, Jones 1 



, var. tuberculata, Salter 36 21 



, subvar. clausa, J, ^- H. 4 



, var. scotica, /. 4' H. (Mr. Grey's 



collection). 



concinna, J. 8^ H. 1 



Maccoyiana, Jones 8 18 



Jonesii, Boll (Dr. HoU's collection). 



admixta, J.^- H. 2 



