140 Oeological Society. 



the positions of the fins, together with as much of the form as can be 

 made out, point to their belonging to the genus Semionotus. The 

 second series were obtained by Mr. E. Wilson, F.G.S., of the Bristol 

 Museum, from Keuper Beds near Nottingham. A large number of 

 specimens were in this case collected ; but all of them are too much 

 broken and crushed out of shape to allow anything very definite 

 to be said about them. Some of these also appear to be Semio- 

 notus ; they agree in size, as well as in some other particulars, with 

 the Shrewley fishes, and may perhaps belong to the same species ; 

 but others, on account of their strongly heterocercal tail and orna- 

 mented scales, seem to belong to the Palseoniscidse. The presence 

 of a third form among these Nottingham fishes is indicated by 

 masses of larger scales. The Eev. P. B. Brodie and Mr. Edw. Wilson 

 each appended notes on the Triassic Beds from which the fishes were 

 obtained. 



2. " Notes on some Carboniferous Species of Murchisonia in our 

 Public Museums." By Miss Jane Donald. (Communicated by J. Gr. 

 Goodchild, Esq., F.G.S.) 



The paper gave a history of the genus Murchisonia, an account 

 of the relations between it and Pleurotomaria, and of the resem- 

 blances to it aiforded by certain recently discovered species of 

 Turritella. The synonymy and a new description of the genus 

 followed, and then of the species M. angulata, M. hendalensis, M. 

 Verneuilliana, and four forms, for which new names were proposed, 

 were described and discussed, with notes on the localities where 

 each had been found and the museums in which the specimens 

 described were preserved The new species were named : — M.joyra~ 

 midata, zonata, s^hcerulata, and tenuissima. 



June 8, 1887.— Prof. J. W. Judd, E.E.S., 

 President, in the Chair. 



The following communication was read : — 



•' A Kevision of the Echinoidea from the Australian Ter- 

 tiaries." By Prof. P. Martin Duncan, M.B., E.E.S., E.G.S. 



After calling attention to a previous paper by himself published 

 in the Society's Journal for 1877, and to additions to the fauna 

 made by Prof. E. Tate and Prof. M'Coy, the author proceeded to 

 give notes on the characters, relations, and nomenclature of the 

 following 29 species of Echinoidea : — 



Cidaris (Leiocidaris) australia;. Clypeaster folium, var. elongata. 



0. (Leiocidaris), sp. 0. gippslandicus. 



Goniocidaris, sp., spines. C. (Mouostychia) australis. 



Salenia tertiaria. C. (Monostychia) Loveni. 



Psamuiechinus Woodsi. Echinobrissus australiffi. 



Ortholophus lineatus. Catopygus elegans. 



Paradoxeeliinus nodus. Pygorhynclius Vassali. 



