384 TRANS. OF THE ACAD. OF SCIENCE. 



PENTREMITES (continued). 



elongatus, Shuinard, 3855. 2d Geol. Rep. Missouri, pt. 2, p. 187, 



pi. B., fig. 4. — Enc. — Burlington, Iowa. 

 Jlorealis, v. Pentremites Godoni. 

 Godoni — Kentucky Asterial Fossil, Parkinson, 1811. Org. Rem., 



p. 235, pi. 13, fig. 36 & 37. — Encrina Godoni, De France, 



1818. Diet. Sci. Nat. T. 14.- Encrinus Jlorealis, Schlot- 



heim, 1820. Pet. Got. — Pentremites ftorealis, Say, 1825. 



Jour. Ac. Nat. Sci. Phil., vol. iv., p. 295.— Sowerby, 1826. 



Zool. Jour., vol. ii., p. 314, pi. xi., fig. 2. — Goldfuss Petrif. 



Germ., vol. i., p. 161, tab. 50, fig. 2. — Troost, 1835. Trans. 



Geol. Soc. Penn., vol. i., p. 224, pi. 10, fig. S.—Pentatre- 



matites jlorealis, Roemer. Monog. Blast., p. 33, tab. 2, fig. 



1-4 ; tab. 2, fig. 8. — Pentremites Godoni, Shumard, 1858. 



Trans. Ac. Sci. St. Louis, vol. i., p. 245. — Hall, 1858. Geol. 



Iowa, vol. i., pt. 2, p. 692, pi. 25, fig. 13.— Dana, 1863. 



Man. Geol., p. 312, fig. 532. — Kask. — Chester, Illinois; 



Perry Co., Missouri ; Grayson Co., Kentucky ; Mt. Sano, 



near Huntsville, Alabama. 

 yranulatus, v. Granatocrinus granulatus. 

 Grosvenori, Shumard, 1858. Trans. Acad. Sci., St. Louis, vol. i., 



p. 240, pi. 9, fig. 2.— Hall, 1860. Geol. Iowa, vol. i., pt. 2; 



Supp. pi. 1, fig. 3. — Arch. — Spergen Hill, Indiana. 



Koninckana, Hall, 1856. Trans. Alb. Inst., vol. iv., p. 4. — Hall, 

 1858. Geol. Iowa, vol. i., pt. 2, p. 656, pi. 22, fig. 11.— 

 Shumard, 1858. Trans. Acad. Sci. St. Louis, vol. i., p. 243, 

 pi. 9, fig. 4. — Arch. — Spergen Hill and Bloomington, India- 

 na ; Randolph Co. and Alton, Illinois ; St. Louis and Ste. 

 Genevieve Counties, Misssouri. 



laterniforruis,t Owen & Shumard, 1850. Jour. Acad'. Nat. Sci. 

 Phil., n. ser., vol. ii., p. 66, pi. 7, fig. 15. — 1852. Geol. of 

 Iowa, Wise. & Miunes.,'p. 592, pi. 5 A., fig. 15. — Pentatre- 

 matites obliquatus, Roemer, 1852. Monog. Blast., p. 47, pi. 

 3, fig. xi. — Arch. — Randolph Co., Illinois ; St. Louis and 

 Ste. Genevieve Counties, Missouri ; near Spergen Hill, In- 

 diana. 



leda, Hall, 1862. 15th Rep. Reg. State Cab. New York, p. 149 



Ham. — Western New York. 



lineatus, Shumard, 1857. Trans. Acad. Sci. St. Louis, vol. i., p. 

 241, pi. 9, fig. 3. (Compare P. VVortheni, Hall.) — Enc.(?) 

 — Monmouth, Illinois. 



i There appear to me good reasons for removing this and other subfusi- 

 • in :.]((jcies, as Pentremites Reinwardtii, P. lineatus, P. bipyramidalis, P. 

 ■i 'i ni, and perhaps P. Grosvenori, from among the Pentremites, and 

 grouping them together in a separate subsection under another name. 

 Theseaud allied forms are remarkable for their slender, subfusiform shape, 

 linear pseudambulacral fields, triangular base, and simple summit struc- 

 I are. These external differences would seem to imply corresponding mod- 

 itications in the internal economy of the animals of more than specific 

 importance. If, from a more thorough study of such species, it shall be 

 deemed advisable fco separate them from the Genus Pentremites, I would 

 propose the name Tkoosticrinus for the group, in honor of tin' Late 

 1 une .lied Dr. Gerard Troost, of Tennessee, one among the earliest of pion- 

 eers in American Geology and Paleontology. 



