356 Dr. H. Woodward — On Helminthocliiton — 



Chitoti sp. ind. 



,, solenformis, E,. Eth, jun. 

 „ Geikiei ,, ,, 



., sp. ind. 

 Chitonelim subqundratus, Kirkby and Toung. 



,, sp. ind. 



,, (?) paielliformis, R. Eth. jun. 



,, Bennieanus, ,, 



,, (?) Kirkbijamis, ,, 



,, Youngianus, Eirkby.] 



{De Koninch's List continued.) 



Upper Devonian. 



Chiton Imvigatus, Fr. Ad. Eoemer. 

 ,, Uimidtis, De Eon. 

 ,, fasciatus, Sandb. 

 ,, subgranosus, Sandb. 



Middle Devonian. 



Chiton corriigatus, G. and F. Sandberger. 

 ,, cordiformis, G. Sandberger. 

 ,, prisms, „ non Miinster. 



,, Sandbergianus, De Ryckh. 

 ,, sagitialis, G. and P. Sandberger. 

 „ n. sp. 



Uppek Silurian. 



Chiton Grayanus, De Kon. 



Lower Silurian. 



Chiton [ISelminthoehiton) Griffithii, Salter. 

 The only species of Chitonidce noticed by G. Lindstrom, in his 

 Silurian Gasteropoda and Pteropoda of Gotland, Stockholm, 1884:, 

 are : — 



Chehdes Bergmani, Davidson and King. 



,, Gotlaiidicus, Lind. 

 Chiton, sp. indet. 



Besides the specimen above described, Prof. T. Rupert Jones had 

 also received from Mrs. Gray several examples of a small fossil from 

 a black Silurian slate-rock, Balcletchie, near Girvan, named Soleno- 

 caris solenoides by MM, Young in 1868.' The small detached 

 oblong valves originally described by the authors were obtained 

 from the Silurian strata of Penwhapple Glen, near Girvan (see Proc. 

 Nat. Hist. Soc. of Glasgow, 1868, vol. i. part i. pp. 171-173, pi. i. 

 figs. 7a, b., and Proc. Roy. Phys. Soc. Edinb. vol. iv. 1878, p. 1(37). 



The genus Solenocaris of Young is also referred to, under the 

 order Fhyllopoda, in " Nicholson and Etheridge's Monograph of 

 the Silurian Fossils of the Girvan District in Ayrshire " (fasc. i. 

 1878, p. 207). The authors point out that the Solenocaris of Young 

 (1868) must not be confounded with the Solenocaris of Meek (1872). 



Messrs. Young thus describe Solenocaris : — 



"It presents, at first sight, all the characters of a bivalve shell of the Solenoid 

 group ; but Mr. Young detected at the posterior part of the hinge-line the peculiar 



1 See also Report on Fossil Phyllopoda, Brit. Assoc. 1883. 



