278 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.52. 



ing the early nineties by Mr. S. Ward Loper, of Middletown, Connec- 

 ticut, under the direction of Prof. W. M. Davis; and in particular, 

 the specimens obtamcd by him from one or two localities near Guil- 

 ford, Comiecticut, deserve notice for the excellence of their preserva- 

 tion, and the clearness with which certain doubtful pokits in the 

 anatomical structure are revealed. Several typical examples from 

 this locahty have been selected for illustration in plates 12 and 13. 



A number of fine examples of Semionotid fishes from the Newark 

 system of New Jersey (pi. 12, fig. 3), and a few from the Richmond 

 coal field of Virgmia, both of Upper Triassic age, are contamed in the 

 collection. An exceptionally perfect specimen of Semionotus elegans 

 Newberry (Cat. No. 8109) from Boonton, New Jersey, is shown in plate 

 15, figure 3. The genus Dichjopyge, founded upon a nearly complete 

 fish from the Richmond basin, is mvested with some historical 

 mterest on account of its having been studied by Charles Lyell, 

 Phihp Grey Egerton, and Louis Agassiz during the fourth decade 

 of the last century.^ 



From the Cordilleran region of this country a large quantity of 

 fish-remains, now in the National Museum collection, was obtained 

 by Dr. CD. Walcott in the years 1879-80, when exploring theKanab 

 Canon of Utah and Arizona as his first work in connection with the 

 United States Geological Survey. Dm-ing the past decade some fur- 

 ther remains from the Shinarump group of southwestern Colorado 

 have been obtained by Dr. Whitman Cross, who has shown that 

 there are strong reasons for correlating the Triassic portion of this 

 group, as defined by Powell, with the lower part of the Dolores forma- 

 tion of Colorado. In the course of his discussion of the homo t axial 

 relations of this group. Doctor Cross introduces a section in Kanab 

 Valley, Utah, made by Doctor Walcott in 1879, showmg the precise 

 position of the beds (Nos. 11 and 13) whence the fish remains were 

 derived. A reptilian fauna occurs in the Shinarump conglomerate, 

 and the fish beds of the Kanab section occur some hundreds of feet 

 above this member.^ 



Although the fish-remains from this section are extremely frag- 

 mentary, it is possible to recognize with certainty the presence of the 

 genera Lepidotus and Plwlidopliorus; and on first examining this 

 material the writer concluded from their general aspect that they 

 indicated a foreshadowuig of Liassic conditions.^ During the past 

 year, however, more complete specimens of the genus Lepidotus 

 have been studied, the largest and best preserved of which are illus- 



> Lyell 's paper on the coal field of the James River, near Richmond, Va., is found in Quart. Joum. 

 Geol. Soc, vol. 3, 1847. Some interesting correspondence between Lyell and Egerton has recently come to 

 light, and is published in the Annals of the Carnegie Museum (vol. 9, 1914, pp. 139-148). 



across, W. The Triassic portion of the Shinarump Group. Joum. Geol., vol. IG, 1908, pp. 97-123. A 

 Devonian fish fauna from this region is also mentioned by Dr. Walcott. 



■'Triassic Fislies of Connecticut. Conn. State Geol. Nat. Hist. Surv. Bull. 18, 1911, p. 35. 



