44 Annals of the Carnegie Museum. 



Genus Meristella Hall. 



i8. Meristella barrisi Hall. (Plate VII, fig. 2.) 

 Meristella barrisi Hall, Pal. N. Y., Vol. IV, 1867, p. 304, PI. 49. 

 Meristella barrisi Kindle, Bull. 391. U. S. G. S., p. 30, PI. 9, figs. 7-9. 



Four specimens identified by the writer as of this species, were 

 collected from the limestone layers in the middle part of the green 

 shale, number 5, from the west valley, north of Three Forks. They 

 closely resemble the forms figured by Dr. Kindle from New Mexico, 

 and also those figured by Hall from the state of New York. 



Order PROTREMATA. 



Superfamily STROP HOME NA CEA Schuchert. 



Family ORTHID.F: Dalman. 



Genus Schizophoria King. 



ig. Schizophoria striatula var. australis Kindle. (Plate VIII, 



figs. 3-5-) 

 Schizophoria striatula var. australis Kindle, U. S. G. S., Bull., 391, p. 21, PI. 2, 

 figs. I and 2. 



About thirty specimens identified as this variety, were collected 

 by the writer from the middle and upper part of member number 5 

 at Three Forks and Logan. The specimens are not as well preserved 

 as those from New Mexico figured by Dr. Kindle, but they resemble 

 them sufficiently closely to make the identification fairly certain. 



Genus Rhipidomella Oehlert. 



20. Rhipidomella vanuxemi(?) Hall. (Plate VIII, figs. 3-5.) 

 Orthis vanuxemi Hall, 1858, Geol. Surv. Iowa, I, pt. 2, p. 487, pi. 2, figs. 2 and 3. 

 A large, number of specimens, identified as this species, were col- 

 lected by Dr. Raymond and the writer from the top of the gray lime- 

 stone, number 4, and the base of the yellow shale, number 2, chiefly 

 at Logan. A few specimens were obtained from near Sappington 

 and Rekap, and in the east and west valley at Three Forks. The 

 specimens are all nearly circular in outline, and are very flat, with 

 no sinus or fold, and the plications have numerous pores as in R. vanu- 

 xemi. This horizon is higher than that in which R. vanuxemi occurs 

 in New York, but, because of the very close correspondence in shape 

 and details, these forms from Montana are identified with some 

 doubt as belonging to this species. 



