﻿ICHTHYOuORULIXES. 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. 



EnnisJcillen Coll. 



Onchus tenuistriatus, 



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 semistriattis, 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. 

 (?) 1885. Onchus tenuistriatus, F. Roemer, Palaeont. Abhandl. vol. ii. 



p. 358, pi. xxxi. fig. 19. 



Type. Olim Murchison Collection. 



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 l . 



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. EnnisJcillen Coll. 



1 Doubtful specimens from the Devonian of Slawjanta, near Pawlowsk, 

 St. Petersburg, are also described by E. von Eichwald, Leth. Kossica, vol i. 

 (1860), p. 1595, pi. lr. fig. 7. 



