271 



[Smilli. 



specie?. It is longer than wide, semi-elliptical. The axis is very promi- 

 nent, has from thirteen to fourteen segments, and tlie furrows on each 

 side are deep. The segments on the lateral lobes are sharply defined 

 and are eight in number ; Shumard mentions only seven on his speci- 

 men, but that slight difference is no obstacle to identity of species, since 

 the number varies with age. These lateral segments do not reach the 

 border, but terminate in a lateral furrow whicli surrounds the pygi- 

 dium. The species is closely related to P. stitula Meek and Worthen, 

 but that species has only eleven axis segments and seven on the sides. 

 ]\Ieek Avas of the opinion that the specimen described as P. scitnla in 

 U. S. Geol. Surv. Nebraska, p. 238, might very possibly belong to 

 P. cUftoiwnsis, but Shumard had seen only a pygidium and had no 

 means of characterizing the rest of the body. 



Phillijisid major Shumard, figured by Meek in U. jS'. Geol. Sure. 

 JVebrrfska, PI iii, Fig. 2, grows much larger than our specimen, and has 

 twenty-two to twenty-three segments on the axis and twelve to thir- 

 teen on the sides. These end abruptly at the lateral furrow, which is 

 much wider than that on P. cliftonensis. 



Occarrence and Locality. — A single well-preserved p^'gidium was 

 found in the Upper Coal Measures of Poteau mountain, Indian Terri- 

 tory, associated with a fauna similar to that of the Upper Coal Measures 

 or Permo-Carboniferous of Nebraska. 



P/iilUpsia {GriffithkJeH) «ct7/;?rt Meek ami Worthen, Proc. Ae Scl. PJtila., 

 1865, p. 270, and Paleont. 111., Vol. v, p. 612, PI. xxxii. Fig. ?>. 

 A pygidium from the Lower Coal Measures of White county, Arkan- 

 sas, 9 N., 4 W., section 6, and another from similar strata in 9 N., 5 W., 

 section 1, show the characteristics of this species, but are too imperfect 

 to figure 



PJdlUpsia, sp. 



In the Lower Coal Measures of Johnson county, Arkansas, 11 X., 24 

 W., section 26, southeast quarter of southwest quarter, was found a 

 pygidium of Phillipsia that could not be identified with certainty, 

 although it probablj' belongs to one of the known species. 



Phillipsia (Grijfithides) ornata A.W.Vogdes, PI. xxii. Fig. 6. Grifflthides 

 ontata A. W. Vogdes, Proc. Cal. Acad. Sci., Ser. ii, Vol. iv, p. 589, 

 "Notes on Palaeozoic Crustacea, No. 4. On a New Trilobite from 

 Arkansas Lower Coal Measures," by A. W. Vogdes. 

 The following description is copied from an advance sheet kindly fur- 

 nished by Capt. Vogdes : 



"The only specimen of this new species was discovered in Conway 

 county, Arkansas, and consists of a head shield which is unfortunately 

 not quite perfect, only exhibiting the right side and part of the glabella, 

 witli portions of the thorax and an entire pygidium ; but it shows suffi- 

 cient new characters to authorize us in considering it as a new species. 



