Dr. Traquair —New Species of Palceoniscidce. 441 



Coal Mine, Cliviger (collected by the late Mr. Aitken) : Arley Mine, 

 Burnley, Lancashire (coll. of Mr. J. Wilde, Ashton-under-Lyne) : 

 Dalernoor Bake Ironstone, Stanton, Derbyshire (British Museum and 

 Museum of Practical Geology) : Millstone Grit Shales, Danebridge 

 (Mr. J. Ward). There is a specimen in the Museum of Practical 

 Geology, labelled from Ladies well Colliery, Staffordshire, but in Mr. 

 Ward's opinion the specimen more probably came from the Lower 

 Coal-measures of the Cheadle district. 



Elonichthys microlepidotus, sp. no v., Traquair. 



I have only seen two specimens of this interesting form, which 

 have been kindly lent to me by Mr. Ward. 



The length of the more perfect of the two is 3f inches ; but as 

 it is broken off immediately behind the anal fin, we may justly esti- 

 mate the original length of the fish at not less than five inches. The 

 external markings of the head-bones are not well seen, except in the 

 case of the lower jaw, which is ornamented by wavy longitudinal 

 branching and anastomozing ridges. In this specimen the mouth is 

 wide open, as is also the gill-cleft, owing to the drawing forward of 

 the suspensorium ; the opercular bones are rather narrow, and beneath 

 them and the mandible the branchiostegal rays may be counted. 

 The scales are small in proportion to the size of the fish, and their 

 markings consist of only a few strong ridges passing horizontally or 

 with only a slight obliquity across the scale. Only the base of the 

 pectoral fin is seen, the other fins are large, and have the form and 

 relative position characteristic of this genus. Their rays are very 

 numerous, fine, and closely set; their joints longer than they are 

 broad, and their surfaces show traces of fine longitudinal striation. 



Remarks. — The relative smallness of the scales and their peculiar 

 simple bold ornament distinguish this species from any other with 

 which I am acquainted. 



Geological Position and Locality. — Knowles Ironstone Shale, Long- 

 ton, Staffordshire, in the collection of Mr. John Ward, F.G.S. 



Rhadinichthys macrodon, sp. nov., Traquair. 

 The specimen upon which this species is founded measures five 

 inches in length, but it is broken off just behind the commencement 

 of the caudal fin, as indicated by the dorsal ridge scales ; the length 

 of the head is 1J inch, and the depth of the body nowhere exceeds 

 one inch. Consequently, the general aspect is that of a fish of slender 

 form, but the specimen cannot be relied on as showing the original 

 shape, as the scales are broken up and confused, and the fin-rays 

 almost entirely wanting. The head exhibits the typical palaeoniscid 

 structure, — the suspensorium being very oblique, the gape wide, and 

 the usual arrangement of opercular and branchiostegal plates being 

 shown ; the bones are, however, seen almost exclusively from their 

 internal surfaces. Both jaws are armed with stout, conical, incurved 

 teeth of unusually large proportional size, those of the maxilla 

 measuring iV to -rV inch in length ; the small external ones are not 

 visible. The scales are of comparatively large size, those of the 

 anterior part of the flank having their exposed areas covered with 



