ICHTHYODORULITES. 95 
42257. Fragment in bone-bed; Ludlow. Baugh Coll. 
P. 5085. Portion of Ludlow bone-bed, with several fragments of 
spines; Norton, near Craven Arms. 
Presented by J. E. Lee , Esq ., 1885. 
45978. Imperfect spine; L. Old Red Sandstone, Bush Pitch, Led¬ 
bury, Herefordshire. Lightbody Bequest. 
P. 2249. Imperfect spine and fragment; L. Old Red Sandstone, 
Ledbury. Egerton Coll. 
P. 2868, P. 3124. Fragment, and block of sandstone with numerous 
fragments; L. Old Red Sandstone, Ledbury. 
„ Enniskillen Coll. 
Onclrns tenuistriatus, Agassiz. 
1837. Onchus tenuistriatus, L. Agassiz, Poiss. Foss. vol. iii. p. 7, pi. i. 
fig. 10. 
1837. Onchus semistriatus, L. Agassiz, ibid. p. 8, pi. i. fig. 9. 
1839. Onchus tenuistriatus, L. Agassiz, in Murchison’s Silur. Syst. 
p. 607, pi. iv. figs. 12, 13, 57-59. 
1839. Onchus semistriatus, L. Agassiz, ibid. p. 596, pi. ii. figs. 12, 13. 
1845. Onchus semistriatus, L. Agassiz, Poiss. Foss. V. G. R. p. 118, 
pi. xxxiii. fig. 37. 
(P) 1885. Onchus tenuistriatus, F. Roemer, Palaeont. Abhandl. vol. ii, 
p. 358, pi. xxxi. fig. 19. 
Type. QUm Murchison Collection, C/*'* . 
The examples of this species recorded below indicate that the 
fragment named 0. semistriatus is a portion of the distal half of the 
spine, in which the smooth posterior area becomes relatively very 
large. . 
Form. Sf Loc./. Upper Ludlow and Downton Sandstone : Hereford¬ 
shire. Lower Old Red Sandstone : Herefordshire h 
P. 5090. Imperfect spine ; Downton Sandstone, Kington. 
Presented by J. E. Lee , Esq., 1885. 
45975-76. Basal half of spine, and imperfect impression of another; 
L. Old Red Sandstone, Bush Pitch, Ledbury, Hereford¬ 
shire. Lightbody Bequest . 
P. 2249 a. Imperfect spine ; Ledbury. Egerton Coll. 
P. 2865-66. Five spines, one associated with a fragment of a similar 
spine ; Ledbury. Enniskillen Coll. 
1 Doubtful specimens from the Devonian of Slawjanka, near Pawlowsk, 
St. Petersburg, are also described by E. von Eichwald, Leth. Kosfica, vol, i. 
(I860), p. 1595, pi. lv. fig. 7. 
