94 M. L. de Koninck on two new Species of Chiton 
species of Chiton (C. levigatus*), obtained from the upper part 
of the Devonian strata near Grund, and figured another to 
which he did not give a name, but which I propose to designate 
under that of C. tumidust. 
The following is a list of all the species of fossil Chitons 
known up to the present time, with an indication of the geolo- 
gical series in which they have been observed, and the locality 
from which they were obtained t :— 
Upper Tertiary. 
. Chiton siculus, Gray. Sicily. 
fascicularis, Linn. Sicily; Sutton. 
— Rissoi, Payraudeau. Sutton. 
strigillatus, Wood. Sutton. 
ee arcs Michelotti. Turin. 
subapenninus, Cantr.? 
. —— subcajetanus, Poli (ex fide D’Orb.). Turin. 
-transenna, Lea. Virginia. 
NO o Ree 
Lower Tertiary. 
. Chiton antiquus, Conrad. Alabama. 
. —— grignonensis, Lamk. Grignon. 
Great Oolite or Bathonian. 
10. Chiton Koninckii, Eudes Deslongch. Langrune. 
Laas. 
11. Chiton Deshayesii, Terquem. Thionville. 
Trias. 
ie Chiton? Cottai, Geinitz. Bunter Sandstone. 
. ——, sp. 
oe 
Permian. 
14. Chiton Loftusianus, King. Durham. 
15. —-— Howseanus, Kirkby. Durham ||. 
ane gragae und H. v. Meyer, Paleontographica, t. v. p. 36, pl. 7. 
g.8 a,b. 
t Ibid. pl. 7. fig. 9 a, d. 
t To this list of M. De Koninck’s I have added others since discovered, 
so as to make it complete up to the present time.—W. H. B. 
§ When at the Aberdeen meeting of the British Association in September 
1859, I was shown by Mr. Charles Moore, of Bath, some plates of Chiton 
obtained by him, with other very interesting fossils, from the Trias forma- 
tion near Frome, Somersetshire. This will therefore add an additional 
species to the doubtful one included in the above list.—W. H. B 
| In 1856 this Permian species was discovered at Tunstall and Hum- 
bleton Hill, Durham, and was described in 1857 by Mr. J. W. Kirkby ; 
in March 1859 he also described, in the ‘ Proceedings’ of the Geologi- 
cal Society of London, the four following additional species. One of these 
he doubtfully refers to Chiton proper; the others he considers to belong to 
