PAHALEGOCERAS. 101 



one pair more than possessed by (rastrioceras, with which this genus has 

 sometimes been united. 



There is no otlier species witli which this may be com])ared; tlie writer" 

 erroneously identified a species from the Lower Coal Measures of Arkansas 

 with P. ioivcnse, but further study of the specimen has shown it to be 

 specifically distinct, and it is described in this paper under the name of P. 

 newsomi. Hyatt has described/ under the name of Paralegoceras ioivense 

 Meek and Worthen, a goniatite from the Bend formation of Texas. But 

 the lobes are not exactly like those of the Iowa Coal Measures species, the 

 third lateral saddle is on the uml^ilical shoulders, and the young shell is 

 marked with ribs which form well-defined tubercles, even on the older shell. 

 These diff"erences were explained by the supposition that the Texas speci- 

 men was the young of Paralegoceras ioivense. and might thus naturally show 

 them. The Bend formation is called Coal Measures by the geological 

 survey of Texas, but its fauna seems to be identical with that of the Fay- 

 etteville shale of Arkansas, which belongs to the Lower Carboniferous, and 

 probably to St. Louis-Chester stage. Species that are almost certainly 

 identical with Glyphioceras incisum Hyatt and G. cumminsi Hyatt have been 

 collected in the Fayetteville shale of Arkansas. 



Occurrence. — Paralegoceras ioivense was first described from the Middle 

 Coal Measures of Alpine, Iowa, and since then has been described from 

 the Bend formation (St. Louis-Chester) of Texas, near Bend, San Saba 

 County. 



Paralegoceras newsomi Smith, sp. nov. 



PI. XII, figs. 4-9. 



1896. Paralegoceras ioicensi\ J. F. Smith. Proc. Am. Philos. Soc, Vol. XXXV, 



p. 263, PI. XIX, %s. 1-3. 

 Not 1860. Goniatites lowens-i^, Meek and Worthen, Proc. Acad. Nat. Sci. Phihi., 1860, 



p. -±71. Not 1866. Goniatltcs Hwensin., Meek and Worthen, Geol. Sun-. 



llliuoi.s, Vol. II, p. 392, PI. XXX, figs. 3a-c. 



Shell somewhat discoidal, with flattened sides and rounded abdomen. 

 Greatest breadth somewhat above the umbilical border. Umbilical 

 shoulders rounded. Whorl indented to about two-fifths of its height by 

 the preceding whorl. Height of whorl equal to the breadth, and nearly 



«Proc. Am. Philos. Soc, Vol. XXXV, p. 26S. 

 ''Fourth Ann. Kept. Geol. Surv. Texas, p. 474. 



