52 
THE SPECIES OF BIASTOIDEA 
[Pentremites piriformis, continued.] 
-. Lower Carboniferous, Chester Group: Cumberland Mt., 
Tennessee, TLS.A. [E. 769.] G. Sowerby Coll. A rather im¬ 
perfect theca. 
-. Lower Carboniferous, Chester Group: Bowling Green, Ken¬ 
tucky, TT.S.A. [E. 7992.] Presented by Hugh Kimbley. Two 
well-preserved thecas. 
--. Lower Carboniferous, Chester Group : (? Kentucky) TT.S.A. 
[E. 8128.] Two rather weathered thecas. 
-. Lower Carboniferous, (? Chester Group): TT.S.A. 
[E. 770.] Presented by J. H. Pearson. A weathered theca with 
adherent matrix. 
[E. 7995.] J. Grenfell Coll. A good little theca. 
-, var. Lower Carboniferous, Chester Group : Chester and Pope 
Cos., Illinois, TT.S.A. [E. 8170.] T. A. Worthen Coll. Three thecas 
intermediate between typical P. pyriformis and var. symmetricus. 
Pentremites piriformis, var. symmetricus. Pentremites sym¬ 
metricus , J. Hall, 1858, Pep. Geol. Surv. Iowa, i (2) p. 694, pi. xxv, 
f. 14. Pentremites pyriformis, Say, var. symmetricus , Hall: It. Ethe¬ 
ridge fil. & P. H. Carpenter, 1886, Cat. Biastoidea Brit. Mus. p. 168, 
pi. ii, f. 24. 
Pentremites pyriformis , T. Say, var. symmetricus, J. Hall: B. Etheridge 
fil. & P. H. Carpenter, 1886, Cat. Biastoidea Brit. Mus. pp. 12, 168, 
pi. ii, f. 24. Lower Carboniferous, Chester Group : TT.S.A. 
[E. 8111.] A theca handed over by the authors as the figured 
specimen. 
-, -. Lower Carboniferous, Chester Group : Huntsville, 
Alabama, TT.S.A. [75964.] Presented by J. H. Pearson. Three 
thecas. 
-,-. Lower Carboniferous, Chester Group : Kentucky, TT.S.A. 
[E. 771.] Two rather weathered thecas, one ground on top. 
-,-. Lower Carboniferous, Chester Group: Chester, Illinois, 
TT.S.A. 
[E. 8146.] T. A. Worthen Coll. A small theca. 
[E. 8147.J T. A. Worthen Coll. A medium-sized theca, with 
swollen basals. 
[E. 8148.] T. A. Worthen Coll. A large well-preserved theca. 
Pentremites potteri, G. Hambach, 1880 : v. Schizoblastus 
sayi. 
Pentremites praelongus, W. H. Baily, 1886 : v. Orophocrinus 
prselongus et O. pentangularis. 
Pentremites projectus (as var. of P. melo), E. B. Meek & A. H. 
Worthen, 1861: v. Cryptoblastus projectus. 
Pentremites puzos, G. von Munster, 1839 : v. Orophocrinus 
puzos. 
