278 
SUPPLEMENT TO THE BHITISII 
it has luulergone, bear a strong resemblance to wliat I have pointed out in SpiH/er 
cuspidatus with this difference, the perforations are much the smallest in the latter 
species, and the fibres are much separated by their intrusion." 
Well-preserved specimens of Spiriferina laniinosa have been recently discovered by 
Dr. E.ankin in the Carboniferous Limestone of Gillfoot, near Carluke, in Lanarkshire. 
16. Spikjferina Ethertdgrt, Bav. Sup., PI. XXXIII, figs. 6, 0 a, h, c. 
Spiriperina, sp. Etheridge, junr. Quart. Jonrn. Geo]. Soc, vol. xxxii, p. 463, 
pi. XXV, figs. 25, 2G, 27, 18/6. 
" Small, transversely oval, wider than long ; ventral valve the more convex of the 
two. Hinge-line less than the width of the shell ; cardinal angles rounded ; beak 
incurved and moderately produced above the area, which is concave and triangular; 
fissure wide. Ventral valve with a simple shallow sinus, and three rounded ribs on each 
side, the outer ones indistinctly marked. In the dorsal valve the mesial fold is composed 
of a single rib, larger than either of the others, two on each side. No laminae of growth. 
Shell-structure perforated by minute tubuli, giving the surface a dotted appearance. 
" Obs. — This little shell diff'ers from Sp. cristata, Schl., var. octoplicata. Sow., by the 
hinge-line being less than the width, by its very rounded cardinal angles, perfect sim- 
plicity of the mesial fold and sinus, much less number of ribs, total absence of any laminae 
of growth, spinose asperities, or granules on the surface." 
I have reproduced Mr. Etheridge's description and figures, as I have nothing further 
to add to what he has said. 8p. Etherid(/ei occurs at Eullarton Quarry, near Temple, 
Edinburghshire, in shale between bands of the No. 2 Limestone {= Hosie Limestone) of 
the Lower Carboniferous Limestone group of the Midlothian series. 
Sub-genus Syringothyris, Winchell} 
Etymology — svpiyl,, a tube; and 6vpis, a window. 
17. Syringothyris (Anomites) cuspidata, Martin = Si/rin(/otJi7/ris ti/pa,W'mc\\Q\\. 
Spirifera cuspidata, Daw. Garb. Mor.., p. 44, pi. viii, figs. 19 — 24; pi. ix, figs. 
1, 2; Sup., pi. xxxii, fig. 16; pi. xxxiii, figs. 1, 2, 3. 
Since describing the exterior characters of Spiriferd cuspidata, at p. 44 of my 
Monograph, much additional information regarding the intimate shell-structure and 
^ ' Proceedings of the Academy of Natural Sciences of Philadelphia,' 1863. 
