138 Mr. R. Kidston on the Occurrence of the 
by the action of the spirit” was Gossea microdentopa, Bate. 
T succeeded in extracting three specimens from a mass of 
fungus, and was rewarded by discovering that it was the same 
species as that described by Bate in the ‘ Catalogue of the 
Amphipoda in the British Museum’ under the name of 
Pherusa fucicola, Leach, at p. 145, and again under Gossea 
microdentopa at p. 159. This therefore adds another to the 
list of synonyms given by me in Ann. & Mag. Nat. Hist. 
1891, ser. 6, vol. vil. p.421, under the name Pherusa Jurinii, 
M.-Edw. It will not, however,“involve any alteration im the 
generic name Apherusa proposed by me (Ann. & Mag. Nat. 
Hist. 1891, vol. viii. p. 83), because a genus of Coelenterata 
was named Gossea by Agassiz in the same year (1862) as Sp. 
Bate’s was published. It is therefore obviously more conve- 
nient that Agassiz’s genus should be retained. 
Pherusa bicuspis. 
This, as I have elsewhere* shown, is not Amphithoé bi- 
cuspis, Kroyer. 
Nant-y-Glyn, Colwyn Bay, 
December 9, 1891. 
XIX.—On the Occurrence of the Genus Kquisetum (EK. 
Hemingwayi, Kidston) in the Yorkshire Coal-measures. 
By Roperr Kinston, F.R.S.E., F.G.S. 
UntIt the description of Hquisetum Mony? from the Comentry 
Coal-field by MM. Renault and Zeiller +, there was no satis- 
factory record of the occurrence of the genus Hguisetum in 
Paleozoic times f. 
* ¢Fauna of Liverpool Bay, 2nd Report, p. 173; ‘ Proceedings of the 
Liverpool Biological Society,’ vol. 11, p. 173. 
+ ‘Comptes-rendus Acad. d. Sciences,’ Paris, January 5, 1885, Also 
see Renault and Zeiller, “ Etudes sur le terr. houill. d. Comentry: Flore 
fossile,” part li. p. 594, pl. lvii. fig. 7 (Bull. de la Soc. de l'industrie miné- 
rale, 3° sér. vol. iv. ii® ivr. 1890: St. Etienne). 
{ Several specimens from the Coal-measures have been described under 
the name of Lguisetites, but none of these examples are sufficiently per- 
fect to enable one to form any definite opinion as to their true systematic 
position. :; 
Some have placed the Equisetites mirabilis, Sternb., in Equisetum. The 
Equisetites lingulatus, Germar, is another species whose systematic posi- 
tion is not satisfactorily determined. 
