29. Athyris ? incerta (Dav.). Rare. 30. — erratica (Dav.). Rare. 31. Nucleospira Vicaryi (Dav.). Not common. 32. Orthis pulvinata (Salter). Not common. 33. Strophomena Rouaulti (Dav.). Rare. 34. — Etheridgii (Dav.). Rare. 35. — Edgelliana (Dav.). Rare. 36. — Vicaryi (Dav.). Rare. 37. — budleighensis (Dav.). Rare.
And two or three more species, not sufficiently complete for specific identification.
Notes on and Descriptions of the Species.
1. Lingula Lesueuri (Rouault). Pl. IV. fig. 1.
Bull. Soc. Geol. de France, vol. vii. 2nd ser. p. 727, 1850 ; Salter, Quart. Journ. Geol. Soc. vol. xx. p. 292, pl. xvii. fig. 1 ; Dav. Sil. Hon. p. 42, pl. i. figs. 1-11.
This curious species has been correctly described and illustrated by Mr. Salter and myself. I, however, much regret that M. Rouault did not figure his French type. It varies considerably in its comparative length, so that the sides, instead of being always subparallel, sometimes diverge at once from the beak to the frontal margin ; and it might, under that aspect, be readily mistaken for a distinct species. L. Lesueuri was found in situ by M. Rouault in the Lower Silurian (Lower Llandeilo), at Guichen, in Brittany, and by MM. E. de Verneuil and Triger at St. Leonard, in the Department of the Sarthe. It is not very rare at Budleigh-Salterton, and was once found by Mr. Vicary associated with Rhynch. Vicaryi. The Rev. P. B. Brodie mentions having picked it up, as well as Orthis reduce, var. Budleighensis (but separately), in quartzite or sandstone pebbles similar to those discovered by Mr. Vicary, in the drift at Bowington, in Warwickshire. The shell which approaches most to L. Lesueuri is the L. Bechei from the Upper Llandovery of Marloes Bay.
2. Lingula Rouaulti (Salter). Pl. IV. fig. 2. Quart. Journ. Geol. Soc. vol. xx. p. 293, pl. xvii. figs. 4 & 5 ; Dav. Sil. Mon. p. 40, pl. i. figs. 14-20.
This is a very remarkable species, and has been described and illustrated by Mr. Salter and myself. I have seen French examples in the collection of M. E. de Verneuil which agree with ours, but the shell seems to have attained somewhat larger proportions in the " Armorican Grit " of Brittany. Certain specimens bear much resemblance to Lingula crumena, Phillips, with which it might sometimes be confounded. L. Rouaulti is a Lower-Silurian species and not very rare at Budleigh-Salterton ; but no other Brachiopod has hitherto been found associated with it in the same pebble.
3. Lingula Hawkei, Rouault. Pl. IV. fig. 3.
Bull. Soc. Geol. de France, 2nd ser. vol. vii. p. 728, 1850; Salter, Quart. Journ. Geol. Soc. vol. xx. p. 293, pl. xvii. figs. 2 & 3 ; Dav. Sil. Mon. p. 41, pl. i. figs. 21-26.
