242 FOSSIL REMAINS OF HYBODTJS 



is, I believe, the Carex uliginosa of Suter, not Linnaeus ; but was made 

 a variety of Car. intermedia by Hegetschweiler, in an edition of Suter's 

 ' Flora Helvetica,' in 1822, with the following character: — "Spicis in- 

 ferioribus distantibus." I have the same plant from meadows near 

 Mortlake, Surrey; and Dr. Bromfield has kindly forwarded it to me 

 from the Isle of Wight. In the Kirtlington locality I could not find 

 Carex intermedia in its usual state. 

 paniculata, Linn. In the osier beds near the Cherwell below En- 

 slow bridge. I insert this locality on the authority of Mr. James Saun- 

 ders, who showed me a series of specimens he had gathered there. 

 ampullacea, Gooden. In the Peat-pits, common. 



Myriophyllum verticillatum, Linn. In ditches in the meadows between 

 the Oxford canal and the Cherwell, particularly near the swing bridge. 



Salix pentandra, Linn. A tree, bearing sterile catkins, of this beautiful 

 species of willow, hangs over the spring in Oldbury, and when in flow- 

 er quite perfumes the air with the fragrance of its blossoms, which are 

 also much resorted to by bees of various kinds. 



Art. IX. — Illustrated Zoological Notices. By Edward Charles- 

 worth, F.G.S., &c. 

 ( Continued from Vol. i. n. s. p. 534.^ 



On the Fossil Remains of a Species of HYBODUS, from Lyme Regis. 



Our acquaintance with the zoological history of the defen- 

 sive fin-bones termed Ichtkyodorulites, both as it respects 

 their specific determination and the group of fishes to which 

 they appertain, is principally due to the labours of Louis 

 Agassiz : and a considerable portion of the work now in 

 course of publication by this eminent naturalist, — the ' Re- 

 cherches sur les Poissons Fossils,' — is devoted to the illus- 

 tration and description of these interesting fossils. Ranging 

 vertically from the deposits of the cretaceous period to those 

 of the Silurian system, and horizontally throughout an area 

 of probably unlimited extent, the Ichthyodorulites, owing to 

 their bony texture and exterior of enamel, have been preserv- 

 ed during the long period of their entombment with singular 

 fidelity : and when disinterred from their matrix, assisted by a 

 knowledge of the teeth, with which these osseous rays were 

 formerly associated, the ichthyologist may safely venture to 

 infer their relation to existing types, though all other traces 

 of the skeleton may have disappeared. 



The genus Hybodus is spoken of by Agassiz as being per- 

 haps the most important of the extinct genera of placoid or 

 cartilaginous fishes, in which one or both dorsal fins were 

 armed with these defensive weapons. A large number of 

 species are already characterised in the ( Poissons Fossils,' 



