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Over a dozen examples of a large fish from the shales of the Albert mines are now in the 

 possession of this Survey, and are in the writer's opinion referable to this species. In fact, of 

 the specimens of fossil fishes from this locality, all the large ones appear to belong to this species. 

 They range in length from about 18-5 cm. (approximately of the size of the type specimen) to 

 nearly 35-5 cm. or about 14 inches. The specimens depicted by Jackson in plate I, figure 5, 

 and plate II, figure 1, are also believed to belong to this species. The original of Jackson's figure 

 4, plate I, the type of Palmoniscus jacksoni, Dawson, is not available for study, but, judging 

 from the figure, it is presumably not distinct from E. browni. Its length, as stated by Dr. 

 Jackson, was originally 15 inches. 



Jackson's original description appeared as follows, on page 22 of his report: "PI. I, Fig. 2. 

 This beautiful fish was found by Mr. Brown, the captain of the mine, subsequent to my first 

 visit to Hillsboro'. It is one of the largest, or full grown species. It was unfortunately broken 

 in the operation of extracting, but it still is a very valuable specimen. This being the first fossil 

 fish found by the chief miner, I have named it Palmoniscus Brownii. 



"Description. — Fish nearly whole. It is one of the largest species yet found, and its length 

 isthreetimesthegreatest width of its body; whole length, 5 3-lOth inches; breadth,! 7-lOth 

 inches; head broken off just in front of pectoral fin; extremity of tail broken; abdominal fin 

 missing, it having been broken in getting out the specimen. Dorsal fin, a little behind middle 

 of body, opposite, or rather a little in front of anal." 



The original descriptions of the specimens shown in plate I, figure 4, and plate II, figure 1, 

 are as under: — 



"PI. I., Fig. 4. This large and elegant fish was most unfortunately broken in splitting it 

 out from the rock, only the posterior part of it having been saved in a fit condition for delinea- 

 tion. The whole length of the fish was originally fifteen inches. That portion which remains 

 entire is 5 1-2 inches long; it was broken off through the posterior edge of the dorsal fin. It 

 was an old fish, as is evident from the appearance of the scales which are thick, heavy, and have 

 their striations in part obliterated, while the serrations are extremely sharp and deep. The 

 scales are elongated rhomboids, and have many striae upon their surface which run parallel 

 with their upper and lower margins. Caudal scales, acute lozenges. They run down on upper 

 division which is long and covered with scales. Rays of tail come off very distinctly, exclusively 

 from under side of upper division, and the tail is unequal or heterocercal. Until we obtain 

 an entire specimen, perhaps it will be prudent to abstain from giving a specific name. It is a 

 species of the genus Palceoniscus. 



"PL II., Fig. 1. This species so nearly resembles the Palceoniscus decorus of Sir Philip M. 

 de Egerton, as on first view to pass for it ; but on examining the lines of striae, we are forced to 

 regard it as another species. The four great dorsal scales, anterior to the dorsal fin, exactly 

 resemble in form those represented in Sir Philip M. de Egerton's plate. (See Quarterly Journal 

 Geological Society of London, for 1849.) The scales of one specimen* are striated, parallel with 

 the superior and inferior margins, and are deeply and acutely serrated on their posterior edges. 



♦Evidently a misprint for our. 



