300 
SELACniI. 
of Bavaria, is named Acmlus Jlexnosm, K. E. Schafhiiutl, Siid- 
Bayerns Loth. Geogn. (1803), p. 244, pi. Ixiv. fig. 2. 
The following ribbed dorsal spines and hook-liko cephalic spines 
pertain to various species of Ifi/hodwf and Acrodus, but cannot yet 
bo even approximately dotermined. They may bo conveniontly 
arranged in stratigrapliieal order : — 
I. MusenEtKALK. (a) Dorsal Fm-sjnnes. 
48205. Basal portion of a largo spine, assignable to the so-called 
Jfyhodus major, Agassiz ' ; Luneville. I’lireltased, 1877. 
19685, 21509. Fragments of two smaller spines; Bayreuth, Bavaria. 
Ptirchased, 1845 , 1847 . 
P. 2160, P. 2175. Imperfect small spine, and fragment of one still 
smaller ; the latter labelled “ Ifyhoiliis dimidiatus, Agass.,” 
by Egerton, but not showing notches in the posterior 
denticles, and more resembling TT. femiis, Agassiz ^ ; Bay- 
reuth. Kyerton Coll. 
P. 2780. Small broken spine ; Bayreuth. Ennidrillen Coll. 
II. Keupeu. 
P. 2178. Short dorsal fin-spine; Schlotheim, near Gotha. 
Egerton Coll. 
III. Lias. — In addition to numerous fragments, the following in- 
determinable spines from the Lower Lias of I^yme Begis, 
Dorsetshire, may be enumerated : — 
(a) Dorsal Fin-spines. 
30869, 32748-9, 41381. Five small spines, approaching the spine 
named If.crassispimis. Purchased, 185 ( 5 -. 57 , 1809 . 
P. 152. Slender spine, the exserted portion measuring O'l. 
Purchased, 1880 . 
P. 425. Two smaller spines. Purchased, 1882. 
’ L. Agassiz, Poiss. Foss. vol. iii. p. 62, pi. viii.A figs. 7-12; (?) II. von 
Meyer, Palaioiitogr. vol. i. (1849), p. 222, pi. xxx. figs. 3-6 ; P. Eoeuier, Geol. 
von Obcrschlesien (1870), pi. lii. fig. 21. 
“ Ij. Agassiz, tom. cit. p. .63, pi. viii. h. figs. 13, 14. 
® Jj. Agassiz, tom. eit. p. 64, pi. viii. b. fig. 16. (?) II. von Meyer, Palicontogr. 
vol. i. (1849), p. 223, pi. xxx. fig. 0 ; II. v. Meyer & T. Plieninger, Boitr. Pal. 
Wiintembergs, p. 60, pi. xii. fig. 09. (f)0. Oiebel, Zeilsdir. gesainint. Natnrw. 
vol. viii. (1866), p. 426, pi. i. fig. 5. 
