Ichthyology. 85 



flattened, with the anterior edge curved and the point directed backwards; 

 the posterior edge is incurved and serrated ; the outline of each tooth some- 

 what resembling a surgical abcess lancet. 



Of the ribs, two portions have been found of a rounded form, with a 

 sulcus below for the intercostal vessels ; also a small chevron bone. 



The above notice is necessarily a very brief one, from the remains being 

 imbedded in the solid brecciated limestone, and much mutilated} and Dr. 

 Riley and Mr. Stutchbury, to whose exertions their preservation and iden- 

 tification is entirely due, have not yet had sufficient leisure to draw up a 

 detailed account, which, moreover, when completed, will be transmitted, 

 where it is justly due, to the Geological Society of London. 



To the above account it may be added, that the bones were discovered 

 in the quarry east of Durdliam Down ; several being in positive contact 

 with, others one or two feet above the junction of the carboniferous lime- 

 stone with the raagoesian conglomerate. The boulders entering into the 

 composition of the latter, are there of considerable size, angular, and without 

 any appearance of having travelled far. 



ICHTHYOLOGY. 



During the autumn, this city was visited by the celebrated Ichthyolo- 

 gist, M. Agassiz, of Neufchtitel, (en Suisse,) who, upon the breaking up of 

 the British Association at Edinburgh visited, in completing his tour, the 

 collections of Dublin and Bristol. With the museum of the Institution he 

 expressed himself much delighted, discovering there no less than thirty 

 new species of fossil fish, many of them from the black rock, (carboniferous 

 limestone). These specimens, together with several others from the well 

 known collection of Mr. Cumberland, were, at M. A.'s request, liberally 

 transmitted to London, to join the great congress of fishes now assembled 

 at the rooms of the Geological Society, An artist is there at work upon 

 them, and they will form illustrations of M. Agassiz's great work, entitled, 

 " Histoire Naturelle des Poissons Fossilles," of which two splendid num- 

 bers have already appeared. 



This work, which we shall notice at length when we receive the con- 

 clusion of the introduction, will contain descriptions and figures of one 

 thousand species of fossil fish, of which upwards of two hundred are from 

 Great Britain, and for the most part collected by the author during his late 

 visit to this country. 



In mentioning this work, we may express our hopes tliat the possessors 

 of fossil fish throughout the country will forward the views of this distin- 

 guished naturalist, by placing tiicir specimens, or fragments of specimens, 

 under the temporary care of Mr. J^onsdale, at the apartments of the 

 Geological Society; so that M. A. upon his return to this country in the 

 spring, may have the means of emplojing liis necessarily short stay to the 

 greatest advantage. It was very gratifying to our feelings to hear M. 



