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Genus CCELOLEPIS, Pander. S«* 
[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.lcevts (p. 66, 
pi. iv. fig. 11, pi. vi. fig. 10), C. 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; Fpper Silurian, Island of Oesel. 
Presented by Prof. Friedrich Schmidt , 1889. 
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Genus I'lfSELOEUS, Agassiz. Pi /7u^s^*^. 
<f.& x L r - J ,1J5 ^4 
Syn. Pachylepis, C. H. Pander, Foss. Fische Silur. Syst. 1856, "p." 67. 
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^ [Murchison’s Silur. Syst. 1839, p. 606.] TtS 
Thelp le pis, C. H. Pander, ibid. p. 67. , , „ 
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Internal cavity of tubercle opening by a miimte orifice at the , - 
base. - j<?r»9S p it- ■ 
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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. 
(P) 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. Koemer, Palaeont. Abhandl. vol. ii. 
p. 359, pi. xxxi. figs. 21-25. 
<3 i (+y p. <}«). vfe. 
Type. Dermal tubercles ; unhaowu. ■ uni*. AeMoMIM. 
The type species. Tubercles not more than one millimetre in 
diameter, smooth and flattened, quadrate, often with rounded angles, 
sometimes in part fluted. 
^ 1 ° nn ' $' Loc. Lpper 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; Horton, near Onibury, Shropshire. 
Presented by John Edward Lee , Esq., 1885. 
^ «J7 
