20 CATALOGUE OF TYPES AND FIGURED SPECIMENS 



Lituites ibex (Sowerby), 1839. 



1838. Lituites ibex, Sow., in Murch., Sil. Syst., p. 622. 



1848. Orthoceras pcrelegans, Salter, Mem. Geol. Survey, pt. 2, pi xiii., fig. 4 



only. 

 1873. „ trachcale, Id., Camb. and Sil. Foss., p. 187. 



18S2. Lituites ibex, Blake, Brit. Foss. Ceph., pt. i, pp. 95 and 228, 



pi. V, figs. 3, 3«, 4, 5, 8 ; pi. xviii., 



figs. 3, 4, 4a, 5. 



Type. — Middle portion only, about 11 mm. in length. 

 Original of Figs. 4 and 4a on pi. xviii. 



Ludlow, Shropshire. 



Upper Ludlow. Coll. LigJithody. 



Trochoceras giganteum (Sowerby), 1839. 



1839 Lituites giganteus, Sowerby, in Murch., Sil. Syst., p. 622. 

 1855. Hortolus „ McCoy, Brit Pal. P'oss., p. 324. 

 1873. Trochoceras „ Salter, Camb. and Sil. P""oss., pp. 160, 174. 

 1882. ,, „ Blake, Brit. Foss. Ceph., pt. i, p. 223, pi. xxxi., 



figs. I, 2, 



Type. — Specimen figured by Blake to show the asym- 

 metry and contracted mouth aperture. 



Leintwardine, Shropshire. 



Lower Ludlow. Coll. Lightbody. 



CRUSTACEA. 



Leaia Leidyi, var. Williamsoniana, Rupert Jones, 1862. 



1836. Bivalvular shell Williamson, Phil. Mag., N. S., ix., 



P- 351. 



1839. Aptychus PhilUps, in Murch., Sil. Syst., i., p. 89. 



1862. Leaia Leidyi, var. Williamsoniana, Rupert Jones, Append. Monogr. 



I'oss. Estheriae, Palaeont. SoC., 

 p. 117, pi i , figs. 19, 20. 



Type. — Two conjoined valves. 



Ardwick, Manchester. 



Upper Coal Measures. Coll. Williamson. 



