APPENDIX/ 



Genvs — Lingulella, Salter. 



At page 55 of my 'Silurian Monograph' will be found a full description of this 

 genus, so far as we are acquainted with its internal characters. 



Lingulella perruginea, Salter. PI. XLIX, figs. 32 — 35. 



LiNGULKLLA UNGUicuLUS, Salter. Report Brit. Assoc, 1865, p. 285, 1865. 



— TERRUGiNEA et var. ovALis, Salter. Quart. Journ. Geol. Soc, vol. xxiii, 



p. 340, figs. 1—3, 1867. 



— — — Dav. Geol. Mag., vol. v, p. 306, pi. xv, figs. 



1—8, 1868. 



Spec. Char. Shell small, ovate, oblong ; widest about the middle ; broadly rounded 

 in front; sides nearly parallel for some distance; and the beak obtusely pointed. Valves 

 very slightly convex, and marked with concentric lines of growth. 

 Length 3, width 2 lines. 



Obs. This small species has been correctly described and illustrated by Mr. Salter ; 

 and is, as far as we are aware, the earliest Brachiopod hitherto discovered ; for specimens 

 (fig. 35) were found by Mr. Hicks at the middle and the very base of the purple and red 

 rocks of Sedgwick's "Harlech group, '^ which directly underlies the " Maenevian group," 

 or Lowest Lingida-flags. The position is about 1200 feet lower in the series than the 

 specimen described by Mr. Salter and Mr. Hicks in the ' Quart. Journ. Geological Society' 

 (vol. xxiii). The shell does not appear to be scarce, but the beds are much cleaved, and 

 their colour is not in any way favorable to the exhibition of the characters of so thin 

 a shell. 



After an attentive comparison of the single example of the variety ovalis with a 

 number of specimens of L. ferruginea from the " Maenevian group," I was quite at a loss 



^ Tlie larger portion of the contents of this Appendix was published in my paper " On the Earliest 

 Forms of Bracbiopoda."— ' Geol. Mag.,' vol. v, pp. 303, &c., 1868. 



