﻿153 CCELOLEPIDJE. 



Genus CCELOLEPIS, Pander. 

 [Foss. Fische Silur. Syst. 1856, p. 66.~] 



Internal cavity of tubercle widely open at the base. 



Of this genus four species are recognized, according to the form 

 of the scale and its ornamentation. They are named C. Icevis (p. 66, 

 pi. iv. fig. 11, pi. vi. fig. 10), 0. schmidti (p. 66, pi. iv. fig. 12), C. 

 goebeli (p. 66, pi. iv. fig. 13), and C. carinata (p. 66, pi. iv. fig. 14, 

 pi. vi. fig. 13), and each form is exhibited upon the following 

 specimen : — 



P. 6017. Small slab of shelly limestone, with numerous minute, 

 ganoid scales ; Upper Silurian, Island of Oesel. 



Presented by Prof. Friedrich Schmidt, 1889. 



Genus THELODUS, Agassiz. 

 [Murchison's Silur. Syst. 1839, p. 606.] 



Syn. Pachylepis, C. H. Pander, Foss. Fische Silur. Syst. 1856, p. 67. 

 Thelolepis, C. H. Pander, ibid. p. 67. 



Internal cavity of tubercle opening by a minute orifice at the 

 base. 



Thelodus parvidens, Agassiz. 



1839. Thelodus parvidens, L. Agassiz, in Murchison's Silur. Syst. 



pp. 606, 704, pi. iv. figs. 34-36. 

 1855. Thelodus parvidens, F. M'Coy, Brit. Palaeoz. Foss. p. 576. 

 (?) 1856. Pachylepis glaber, C. H. Pander, Foss. Fische Silur. Syst. 



p. 67, pi. iv. fig. 10, pi. vi. figs. 1-6, 8. 

 1885. Thelodus parvidens-, F. Roemer ; Palaeont. Abhandl. vol. ii. 



p. 359, pi. xxxi. figs. 21-25. 



Type. Dermal tubercles ; unknown. 



The type species. Tubercles not more than one millimetre in 

 diameter, smooth and flattened, quadrate, often with rounded angles, 

 sometimes in part fluted. 



Form. Sf Loc. Upper Ludlow Bone-bed : Herefordshire. Upper 

 Silurian Boulders : N.E. Germany. (?) Upper Silurian : Isle of 

 Oesel, Baltic Sea. 



P. 5099. Fragment of Upper Ludlow Bone-bed filled with the 

 tubercles ; Norton, near Onibury, Shropshire. 



Presented by John Edward Lee, Esq., 1885. 



