PROCEEDINGS 



OF 



THE GEOLOGICAL SOCIETY OF LONDON. 



Vol. IV. Part I. 1843. No. 95. 



May 10.— James Jerwood, Esq., A.M., F.C.R.S., of the Middle 

 Temple, Barrister-at-law, Sothernhay, Exeter ; Dr. Billing, M.D., 

 of Park Lane ; Lieut. Thos, A. B. Spratt, of the Royal Navy, Assistr 

 ant Surveyor H. M.S. Beacon ; and Gabriel Hamilton Lang, of Over- 

 ton, Dumbartonshii'e, were elected Fellows of the Society. 



A paper was read " On some new Ganoid Fishes." By Sir Philip 

 Grey Egerton, M.P., F.G.S. 



The specific characters of the fishes described are as follows : — 



1. Semionotus pentlandi, Egerton. — Body deep; pedicle of the tail 

 thicker proportionally than in Semionotus latus. Anal fin long, with 

 5 or 6 rays, articulated, subdivided, and decreasing in length from 

 the first. Bases distant ; 3 or 4 fulcral rays on the margin. Caudal 

 fin large ; upper lobe invested with scales for some distance. Mar- 

 gins fringed by elongated imbricated scales. Rays : 20, articulated,, 

 subdivided. Bases at greater intervals near the centre. Scales 

 rhomboidal, smooth, with entire margins. Stratum, Lias. 



Found by Mr. Pentland in a black bituminous schist at Giffoni, 

 near Castella Mare. In the cabinets of the Earl of Enniskillen and 

 Sir Philip Egerton. 



Of the six species of Semionotus described by Professor Agassiz, 

 one is from the quader-sandstein, the other five from the lias of, 

 Lufeld, Boll, Lyme Regis, and Schoven in Sweden. From a com- 

 parison of Mr. Pentland's specimens of this and the two following 

 species with all those described, Sir Philip Egerton considers they 

 approximate more nearly the species of the lias than those of the 

 greensand, and infers from this zoological evidence that the Giff^oni 

 beds belong to the former. 



2. Semionotus pustulifer , Egerton. — Fish large; operculum arenated; 

 humerus and scapula pustulated ; scales thick and lustrous ; surfaces 

 slightly uneven ; upper and lower margins deeply undulate. Stratum, 

 Lias ; found with last. Cab. Egerton. 



3. Semionotus minutus, Egerton. — Fish small; body slender ; cau- 

 dal pedicle thick ; scales extended over the upper lobe of the t3,il. 

 Stratum, Lias ; found with last. Cab. Egerton. 



4. Lepidotuspectinatus, Egerton. — Fish oblong, subfusiform; length 

 9 inches ; depth 2f ; head small ; fins small ; scales marked with 

 delicate radiating strise ; posterior margin finely pectinate ; upper 

 edge convex, lower one concave ; dorsal, anal and caudal scales 



VOL. IV. PART I. o 



