CARBONIFEROUS BRACHIOPODA. 
273 
The following is a list of the Carboniferous species successfully operated upon by- 
Mr. Glass : — Spirifera striata and var. Mosqiiensis, Sp. pinguis, var. rotundata, 8p. ovalis, 
Sp. trigonalis, Sp. glabra, Sp. elliptica, Sp. lineata and var. ivibricata, Sp. planata, Sp. 
cuspidatn, Sp. subconica, Athyris lamellosa, A. planosulcata, and A. Bogssii, but unfortu- 
nately of Sp. cuspidata a suitable specimen could not be obtained so as to show the 
spinal appendages in their natural position. 
The British Carboniferous species of Spiriferidse have been arranged into six genera 
or subgenera — S^nrifera, Spiriferina, Sgringothyris, Cgrtina, Athgris, and Betzia, but the 
subject may still require further investigation. From the observations made by Dr. L. 
de Koninck, that certain species usually classed with Spirifer, such as Sp. glabra, have 
their shell-substance perforated by minute canals, it will be hereafter necessary that the 
shell -structure of all the species composing the genus should be made the subject of 
microscopic examination, as well as to ascertain what are the characters of the interior 
surface of their ventral valves. 
Prof. L. de Koninck, in a paper entitled " Liste des Brachiopodes carboniferes de 
Belgique munis d'une spire,'' 1859, has proposed an arrangement of the Spiriferidae 
slightly different to the one I had adopted for the British species. He arranges his species 
into three columns, the first comprising species found in the " Calcaire de Vise," the 
second those in the " Calcaire de Tournay," and in the third those species are enumerated 
that are common to two horizons ; and he further shows that only seven are common to 
the two localities and horizons. He points out that a similar kind of arrangement of the 
species would occur in Great Britain, but I am not certain that he is correct in the view 
he takes upon the subject. In his reply to the President of the Geological Society, after 
receiving the Wollaston Medal, the same distinguished Belgian palaeontologist observed 
that the Carboniferous fauna of Belgium is composed of three great groups perfectly 
distinct, although possessing a certain number of identical species, the first consisting of 
the forms occurring in the " Calcaire, or Limestone of Tournay," the second, of those 
occurring in the neighbourhood of Dinant, and the third, of those from the " Calcaire of 
Vise," and from some outliers of the same limestone in the neighbourhood of Namur ; 
and that these faunas are represented in Great Britain ; the first in Ireland, at Hook 
Point and its neighbourhood ; the second in the neighbourhood of Dublin ; and the third 
in Scotland and in the centre of Yorkshire, where it has been the subject of the 
remarkable researches of the late Prof. Phillips.^ 
* Prof. L. de Koninck states in the first named of his memoirs : " Tout le calcaire carboniffere de 
rirlande, surtout celui de Hookpoint, des environs de Dublin, d'Enniskillen, d'Armagh, si remarquables 
par le grand nombre de fossiles qu'ils renferment, appartient par sa faune au calcaire de Tournay, lequel 
a encore en Angleterre pour representants le calcaire des environs de Bristol, du Gloucestershire et d'une 
autre partie de I'Yorkshire (Richmond), tandis que celui d'une autre partie de ce dernier Comte (BoUand), 
ainsi que celui de I'Ecosse, des pays de Galles, des environs de Manchester et de Newcastle sont semblables 
au calcaire de Vise." But he adds : " E.ien, done, comme Ton le voit, ne prouve que le calcaire de Vise est 
