PALEONTOLOGY 



shire. The second species, Platysomus parvulus, which is common to the 

 Littleborough and St. Helens districts, and is also widely distributed in the 

 north of England and Scotland, is a member of the type genus. A second 

 representative of the same genus, P. forsteri, is included in Mr. Morton's list 

 from the Victoria pit. 



At the close of his list of the species from the latter locality Mr. Morton 

 adds the following note : 



' The genera Ccelacanthus, Ctenoptychius, Diplopterus, Gyrolepis, Holoptychius, 

 Megalichthys, and Platysomus, have been recorded from various localities in 

 south-west Lancashire, but since Mr. William Peace, of Wigan, collected fish- 

 remains associated with the cannel coal of that place, fifty years ago, so little 

 has been done that the list requires revision.' 



From the Millstone Grit of the county Mr. Wellburn 1 has recorded 

 the following fishes, viz. : Pristodus falcatus, Psephodus, sp. Pcecilodus jonesi, 

 Orodus elongatus, Helodus, sp. Acanthodes ivardi, Climatius, sp. Euctenodopsis 

 (gen. nov.), Acondylacanthus, sp. Ccelacanthus,yp.Rhadinichthys, spp. Elonichthys 

 aitkeni, and Acrolepis hopkinsi. 



ADDENDUM 



The following species of Carboniferous fishes appear in Mr. Bolton's 

 list of 1905 in addition to those above-mentioned, viz. : Pleuracanthus alatus, 

 P. cylindricus, P. serrafus, Helodus simplex, Psephodus magnus, Sphenacanthus 

 hybodoides, Hoplonchus elegans, Gyracanthus formosus, Euctenius unilateral!*, 

 Ctenodus cristatus, Strep Sodus saur aides, S. sulcidens, Elonichthys striatus, and 

 Mesolepis scalaris. 



1 Geol. Mag. (4), viii. 216 (1901). 



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