54 



discoverer and describer, Dr. E. X. S. Ringueberg, \v;is named 1>. minor* 

 This name being pre-occnpied, D. ringuehergi was substituted for it by 

 Newberry.f In 1886, Dr. Herbert Upham Williams described and 

 figured two new species, both of the genus Palseoniscus De Blainville.J 

 These wore P. riticulatus II. U. Williams .and P. antiquus II. U. Wil- 

 liams. With those were Found remains of, probably, Dinichthys ringue- 

 hergi Newberry (D. minor Ringueberg). Since that time a number of 

 remains have come to light from these shales, S among which the follow- 

 ing may be mentioned: 1. — A specimen showing both rami of the 

 mandible of a Dinichthys, which may be referred to D. minor Newberry 

 with a good deal of reservation, since the terminal portion is completely 

 crushed, and beyond the recognition of the characteristic features. Its 

 size is intermediate between that of I), minor Xewb. and that of D. 

 newberryi Clarke. 2. — A specimen of an undescribed Dinichthys, con- 

 siderably weathered. 3. — A specimen which appears to be the terminal 

 tooth of I), minor Xewb., but smaller than the usual form. Resides 

 these there are specimens referable to Mylostoma variabilis Newberry, 

 Callognathus serratus Newberry, and a large scale which appears to 

 belong to a species of Holoptychius, but further examination may result 

 in placing it in a new genus. These remains of fishes arenot found in any 

 ereat abundance. They have to be carefully looked for over a consider- 

 able area at Sturgeon Point, and they are found most frequently asso- 

 ciated with two species of Lingula — L. concentrica Conr., (probably a 

 variety of Schizobolus truncatus Hall) and L. spatulata Vanux., with 

 Goniatites, Lepidodendra, Catamites and Conodonts. The larger 

 specimens of fish remains are usually so much weathered, that then- 

 identification becomes, if not impossible, yet a matter of extreme 

 difficulty." 



Bevond Sturgeon Point the shale disappears again, and 

 unconsolidated material takes its place. In many places the 

 bank is low, and largely composed of sand dunes, in others 

 it is a sand and clay cliff, which bears evidence of being 

 constantly eroded by the waves. Trees and shrubs have 

 slid down the bank, and are now growing from it at all 

 angles. 



At "Dibble Point," beyond the mouths of the Sister Creeks, 

 the shales appear again in a low cliff. They vary in color 

 from dark gray to black, and are full of septaria, most of 



•Am. Journ. Science, Vol. 27, p. 476, 1884-. With figures. 



vTlic Palaeozoic Pishes of North America by J. S. Newberry. Mon. XVI., U. S. 

 Geol. Surv.. p. 60. 



Bull. Buff. Sot. Nat. Sciences, Vol. V., X<>. 2, pp. 81-84; one plate. 

 SMainlv through the labors of Mr. Mixer himself. 



