54 BRITISH SILURIAN BRACHIOPODA. 
Prof. Hall’s specimens measured about an inch in length, while an example of Z. Sal¢eri, 
found by Mr. Vicary, had attained two inches in length ; it, however, remains a question 
whether the American and British specimens may not belong to a single species. 
L. Saltert occurs in the Budleigh Salterton pebbles, and is supposed to be of the 
same age as Lingula Lesueuri, a fossil of the “ Armorican sandstone” of Normandy, which 
has been assigned by Marie Rouault and other paleontologists, upon good data, to the 
Lower Silurian series. 
Lineora (?) tepis, Sa/fer, 1865. Pl. III, figs. 54—58. 
LinauLa Lepis, Salter. Siluria, p. 543, 1859. 
LinGuLELLA — Salter. Memoirs of the Geological Survey of Great Britain, vol. iii, 
p. 334, fig. 11, 1866. 
Spec. Char. Broad-ovate, longer than wide, depressed ; beak pointed, its slopes com- 
bining gradually with the lateral sides; front gently rounded; surface sharply marked 
with fine concentric strie. 
Length 4, breadth 3} lines. 
Ods. Almost every specimen I have seen of this shell is more or less distorted, and, 
consequently, but little can be said with certainty of its specific characters. Mr. Salter 
informs us, however, that it is a smaller and rounder form than Z. Davisiz, and that 
interiorly there exists in the beak a short groove for the passage of the pedicle (see figs. 
53 and 55); the central protractor muscles fill a narrow angular space, which is strongly 
bordered on each side. I must, however, remark that a specimen in the Museum of 
Practical Geology shows the interior (Pl. III, fig. 57) to possess characters so similar to 
those of Lingula proper that I provisionally place it with the last-named genus. 
Position and Locality. Mr. Salter discovered his species in the Lower and Upper 
Tremadoc rocks of the Portmadoe district ; very rarely in the higher beds of the Lingula- 
flags. 
It occurs in the Upper Lingula-flags, near Tremadoc; doubtful. In the Lower 
Tremadoc of Wern; Borthwood; Trwyn-y-Iago; Cefn Cyfarnedd, east of Pontnant-y- 
Ladron, near Taihirion, on the Bala Road from Ffestiniog, &c. Here it is a common 
species. 
In the Upper Tremadoc, under-Moel-y-gest ; Garth, &c. 
