264 Trans. Acad. Sci. of St. Louis. 
PARAPHORHYNCHUS TRANSVERSUM Ni. sp. 
Pl 1,f.12-15. 
1895. Pugnax missouriensis, Hall and Clarke, Pal. N. Y., 
vol 8, pt. 2, pl. 62, figs. 44-45. (Not Rhynchonella 
missouriensis Shumard, 1855.) _ 
1900. Pugnax striaticostata var.?, Weller, Ann. Rep. Ia. 
Geol. Surv., vol. 10, p. 71. (Not Rhynchonella 
striatocostata M. & W., 1868.) ee 
1900. Pugnax striaticostata var.?, Weller, Trans. St. Louis © 
Acad. Sci., vol. 10, p. 72, pl. 2, figs. 16-17. 
Wider than long, the pedicle valve much less convex than 
the brachial, the fold and sinus originating on the umbo, 
‘nearly at the beak. In the number and form of its radiating 
plications and striations this species closely resembles P. 
striatocostatum, but its proportionate width is always greater 
than that species and it attains a larger size at maturity. The 
dimensions of a nearly perfect specimen from Burlington, 
Iowa, are: length 24.5 mm., width 30 mm., thickness 21 mm. 
The average rostral angle of five specimens is 114.5°. 
Localities. This species occurs in the yellow sandstone of 
the upper portion of bed No, 2 of the Kinderhook section at 
Burlington, Iowa, where it is a member of the Chonopectus 
fauna. It also occurs in the yellow Kinderhook sandstone at 
Kinderhook, Illinois, in a bed about 25 feet below the summit 
of the formation, and in the English River grit, at Maples’ 
Mill, near Wellman, Washington County, Iowa. 
EXPLANATION OF PLATE. 
Paraphorhynchus elongatum n. sp., Figs. 1-2, pedicle and brachial views 
of one specimen. Figs. 3-4, similar views of another specimen. Fig. 5, 
lateral view of a third specimen. All from Knox County, Missouri. 
Paraphorhynchus striatocostatum (M. & W.), Figs. 6-8, pedicle, brachia] 
and anterior views of a specimen from Pike County, Illinois. Figs. 9-11, 
pedicle, brachial and lateral views of a specimen from bed No. 4, at Bur- 
lington, Iowa. 
Paraphorhynchus transversum nu. sp., Fig. 12, a pedicle valve from Kinder- 
hook, Illinois. Figs. 13-15, pedicle, brachial and anterior views of a 
specimen from bed No. 2, at Burlington, Iowa. 
Issued May 9, 1905. 
