﻿ICHTHYOBOEULTTES. 117 



Nemacanthus brevis, Phillips. 



..843. Nemacanthus brevispinus, L. Agassiz, Poiss. Foss. vol. iii. p. 17? 



(name only). 

 1871. Nemacanthus brevis, J. Phillips, Geol. Oxford, p. 178, diagr. 



xxxviii. figs. 3-5. 

 1890. Nemacanthus brevis, A. S. Woodward, Proc. Geol. Assoc, vol. xi. 



p. 289, pi. iii. fig. 1. 



Type. Oxford Museum. 



Form. <$f Log. Bathonian (Stonesfield Slate) : Stonesfield, Oxford- 

 shire. 



P. 2218. Two specimens, one figured by the present writer, he. cit. 

 pi. iii. fig. 1. Egerton Coll. 



P. 2851. Two specimens. Enniskillen Coll. 



The following species have also been determined : — 



Nemacanthus granulosus, Minister, in L. Agassiz, Poiss. Foss. 

 vol. iii. (1843), p. 177 (name only) ; (?) F. von Alberti, 

 Ueberblick liber die Trias (1864), p. 208, pi. vii. fig. 9.— 

 Muschelkalk ; Laineck, Bavaria. 



Nemacanthus minor, J. W. Davis, Quart. Journ. Geol. Soc. vol. 

 xxxvii.(1881), p. 419, pi. xxii. fig. 5. — Bhaetic; Wainlode 

 Cliff, Gloucestershire. [Mus. Geol. Soc. London.] 



Nemacanthus sentionis, Miinster, in Agassiz, Poiss. Foss. vol. iii. 

 (1843), p. 177 (name only). Quoted as N. senticosus by 

 C. G. Giebel, Fauna der Yorwelt, vol. i. (1848), Fische, 

 p. 304. — Muschelkalk ; Laineck, Bavaria. 



Nemacanthus tuber culatus, F. Bassani, Atti Soc. Ital. Sci, Nat. 

 vol. xxix. (1886), p. 30. — Upper Trias ; Besano, Lom- 

 bardy. 



The following spine may also be referable to this group of 

 Ichthyodorulites : — 



Psilacanthus aalensis, F. A. Quenstedt, Der Jura (1858), p. 347, 

 pi. xlvii. fig. 20. — Brown Jura /3 ; Aalen, Wiirtemberg. 

 [Tiibingen University Museum.] 



