94 M. L. de Koninck on two new Species of Chiton 



species of Chiton (C. Icevigatus*), 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. tumidusf. 



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 J : — 



Upper Tertiary. 



1. Chiton siculus, Gray. Sicily. 



2. fascicularis, Linn. Sicily ; Sutton. 



3. Rissoi, Payraudeau. Sutton. 



4. strigillatus, Wood. Sutton. 



r __ ( miocenicus, Michelotti. Turin. 

 \ subapenninus, Cantr. ? 



6. subcajetanus, Poll (ex fide D'Orb.). Turin. 



7. transenna, Lea. Virginia. 



Lower Tertiary, 



8. Chiton antiquus, Conrad. Alabama. 

 9. grignonensis, Lamk. Grignon. 



Great Oolite or Bathonian. 



10. Chiton Koninckii, Eudes Deslongch. Langrune. 



Lias. 



11. Chiton Deshayesii, Terquem. Thionville. 



Trias. 



12. Chiton? Cottai, Geinitz. Bunter Sandstone. 



13. , sp . § 



Permian, 



14. Chiton Loftusianus, King. Durham. 

 15. Howseanus, Kirkby. Durham ||. 



* W. Dunker und II. v. Meyer, Palseontographica, t. v. p. 36, pi. 7. 

 fig. 8 a, b. 



t Ibid. pi. 7. fig. 9 a, b. 



% 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 185/ 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 



