Mineralogy and Geology. 
is the smallest. 
the caudal vertebrze, and the 
3. On some addi 
183 
The feathers of the tail are attached in pairs to Lik 
vertebra throughout its entire length. 
arrangements of the tail ss that the 
great and striking pecaliatity of this 
tional species that are common to Cheboniferous and 
It is in the form and number of 
remarkable creature 
ego strata, remarks on the recurrency of Carboniferous species ; 
y.—We c 
8 copy from Mr. Kirkby’s paper the following 
list which will a fal to be of interest to American geologists, whose 
abors have alr ready shown a es sie of species in the two forma- 
tions as they exist in North Am 
List of Species occurring in Carboniferous and Permian Strata in Britain. 
Carboniferous Name. 
1. Gyracanthus formosus, Agassiz. 
erebratula sacculus, Martin, 
1808. 2 lie in Davidson’s Mono- 
oe of Carboniferous Brachiopoda, 
re Spirifera ig Rhee 1828. 
‘Sag in Dav. . Carb. Brach. 
don, Sr os J. de C. 
Bch. igured in Mon. Carb. 
Camarophoria na, Martin 
cg pag in Mone Cah, Brach. 
a3 Ca ia rhomboidea. Pua 
Hck pared in Mon. Carb 
Athyris Royssii, L’Eveillé, 1835. 
Figured in Mon. Carb. Brach. pl. 54. 
8. Discina nitida, Phillips, 1836. 
d pd in Mon. n, Carb, Brach. pl. 54. 
Pinel in Monc Carb. Bra ch. pl. 54. 
p Wa plebeia, M’Coy, 1844. 
taal = plate accompanying pres- 
1d Shite ans Miinster, 1830. 
12 Cythere inornata, M’Co 
ered in Syn. Char. Carb. Fine yh pl. 
13. Cythere (Bardia) gracilis, 
Can pe — in Syn. Char. 
M. Cythere (Bairdia) plebeia, Reuss 
‘(Wikby } Figured in the plate accom- 
Panying present paper. 
Permian Name. 
G. formo. Ag., King, in Mon. 
Perm. Foss. (Ragin, p. 221; Howse, 
Ann. Nat. Hist. ~ 2, vol. xix, p. 33. 
T'. elongata, r. suflata, Schloth. 
1816. a in Davidson’s Mono- 
graph of Carboniferous Brachiopoda, 
1. 54. 
S. Clannyana, King, 1848. Fig- 
ured in Mon. Carb. Brach. pl. 54. 
S. cristata, a ol BA Figured 
in Mon. Carb. Brach. pl. 54. 
C. Schio: theimi, Von Buch, 1834. 
rae in Mon. Carb. Brach, pl. 54, 
lobulina, Phillips, 1834. Fig- , 
ured af Mon. Carb. Brach. pl. 54. 
‘A era, J. de C. Sowerby. 
1840. Peiteed in Mon. Carb. Bracks 
1. 54. 
fe Konincki, Geinitz, 1848. Fig- 
ured in Mon. Car b. Brac h. pl. 54, — 
L. Cre 
F. retiformis 
Figured in the plate 
ent 
are cae Miinster eg ; 
— in on. Perm. Foss. pl. 1 gee 
rans, ge Field Club, hes eB se 
rie es Ae Bed y (Jones 
Prt a 
ky 
ES 
Bs 
Hee 
® 
é 
P. Foss. ; 
rans. Tyne. Field _ ‘aL iv, 
. (Bairdia) plebeia, Reuss. Fig- 
ured in the plate accompanying pres- 
ent paper. 
