44 
CALYMENE, Al. Brongniart. 
Calymene Blumenbaciiii, Al. Brongniart. 
BntomolithllS l^aradoxus, Parkinson, 1811, Organic Eemains, in, pi. 17, figs. 11, 13, and 14. 
Calymene Bl'limenhacllii, Al. Brongniart, 1822, Crust. Foss., p. 11, pi. 1, fig, 1. 
,, Dalmau, 1826, Om Pala}oderna, p. 85, pi. 1, figs. 2-3. 
,, Murclnsou, 1839, Silurian System, p. 653, pi. 7, figs, 6-7 (fig. 5 
exclusa). 
niagarensis, J. Hall, 1843, Geol. Eept. 4tli Distr., p. 101, fig. 3. 
Blumenhacldi, McCoy, 1851, Brit. Pal. Foss., p. 165. 
SllhcUadcmata, Idem, id., ibid, p. 166, pi. IF, fig. 9 (fig. 10 exclusa). 
spectahilis, Augeliu, 1842, Pal. Suecica, pi. 19, fig. 1. 
Blumenbaciiii, J. Barraude, 1852, Syst. Sil. Boheme, I, p. 566, pi. 19, fig. 10. 
,, Salter, 1866, Mon. Brit, Trilob., p. 93, pi. 8, fig. 7-16, and pi. 9, 
fiff. 1-2. 
There cannot he the least doiiht as to the determination of the 
specimens I have Itefore me, which comprise a head and two pygidia. To 
convince oneself it is sufficient to compare tliem with Salter’s excellent 
figures and with the specimens from Dudley, which are widespread in 
collections and very well known. 
Horizon and According to Salter this species came into 
existence prior to the deposition of the Lower Silurian Beds of the Caradoc 
and did not disappear till the upper beds of the Wenlock, in which it is 
found abundantly at Dudley and in Gothland. It is rarer in Bohemia and 
in the United States, where it is found in the Niagara Group. In Australia, 
it occurs in the grey-green argillaceous limestone of Yarralumla, associated 
with the other species of Crustacea I have already mentioned. 
Genus — PBOETUS, Steininger.^ 
Beoetus Stokesii (?) Murchison. 
AsaphtlS Stokesii, Murchison, 1839, Silurian System, pi. 14, fig. 6. 
Broetus ,, Loven, 1843, Svenska Trilobiter, pi. 1, fig. 3. 
Borbesia ,, McCoy, 1851, Brit. Pal. Foss., p. 174. 
Broetus ,, Salter, 1859, in Murchison’s Siluria, p. 540, pi. 17, fig. 7. 
I refer to this species three small pygidia whose characters agree 
perfectly with those given by McCoy and with the outline of the figure of it 
' [For a description of the iiustralian Silurian Proetida3 see Etheridge (E., Junr.) and Mitchell (J.) “The 
Silurian Trilohites of New South Wales, 'with Ecferences fo those of other parts of Australia — Part I.” Procs. 
Linn. Soc. X. S. Wales, 1892, VI (2), Pt. 3, pp. 311-320, pi. 25 : lUd., Part II, op. cit., 1894, VIII (2), Pt. 2, p. 
169.— W.S.D.] ^ r , . w. . i 
