TROOST *S CRINOIDS OF TENNESSEE E. WOOD. 17 



He gives no reason for proposing a new name for that already estab- 

 lished by Roemer. 



Family TROOSTOCRINID^ Bather. 

 Genus TROOSTOCRINUS Shumard. 



Troosticrinus Shumard, Trans. Acad. Sci. St. Louis, II, 1866, p. 384, footnote. 



Troostocrinus Meek and WoRTHEN(in part), Proc. Acad. Nat. Sci. Phila., 1868, p. 

 356; Rep. Geol. Surv., Illinois, V, 1873, p. 507.— Etheridge and Carpenter 

 (in part), Ann. and Mag. Nat. Hist., IX, 1882, p. 247; Cat. Blastoidea, 1886, 

 p. 191.— Miller, North Amer. Geol. and Pal., 1889, p. 287.— Zittel, Text- 

 Book Pal. (Eastman trans.), 1896, p. 195. — Bather, List Blastoidea Brit. 

 Mus. (Nat. Hist.), 1899, p. 68 (catalogue name); A Treatise on Zool., Ill, The 

 Echinoderma, 1900, p. 92. 



Clavseblastus Hambach, Trans. Acad. Sci. St. Louis, XIII, 1903, p. 44. 



In his proposed new classification Hambach states that "All names 

 ending in 'crinus' are omitted/' and he proposes the name Clavae- 

 blastus to include Troostocrinus reinwardtii, the type of Shumard's 

 genus Troostocrinus, and other similar forms. The change of a name 

 merely on account of inappropriateness of form is not in accord with 

 the accepted rules of nomenclature, and the genus Troostocrinus being 

 defined and well established in the literature should stand. 



TROOSTOCRINUS REINWARDTII (Troost). 



Plate 3, figs. 2, 3, 4. 



Pentremites reinwardtii Troost, Trans. Geol. Soc. Pennsylvania, I, Pt.2, 1835, p. 

 224; 5th Rep. Geol. Tennessee, 1840, p. 58; 6th Rep. Geol. Tennessee, 1841, 

 p. 14. — Yandell and Shumard, Contr. Geol. Kentucky, 1847, p. 6. — 

 Roemer, Neues Jahrb. fur Min., 1848, p. 296. — Troost, Proc. Amer. Ass. 

 Adv. Sci., II (read 1849), 1850, p. 60 (catalogue name) ; MSS., 1850.— Yandell, 

 Proc. Amer. Ass. Adv. Sci., 1851, p. 232. — Dujardin and Hupe, Hist. 

 Nat. Zooph. Ech., 1862, p. 99. 



Pentatrematites reinwardtii Roemer, Archiv. f. Naturg., Jahrg. XVII, I, 1851, p. 

 372, pi. vi, fig. 12a-c/ Sil. Fauna westl. Tennessee, 1860, pi. hi, fig. 2a-c. 



Pentatremites reinwardtii Bronn, Klassen und Ordn. Thier-Reichs., II, 1860, 

 pi. xxih, figs. 4a, b. 



Troosticrinus reinwardtii Shumard, Trans. Acad. Sci. St. Louis, II, 1866, pp. 384, 

 385. 



Troostocrinus reinwardtii Etheridge and Carpenter, Ann. and Mag. Nat. Hist., 

 IX, 1882, p. 249; Cat. Blastoidea, 1886, p. 194, pi. xn, figs. 11, 12; pi. xvn, 

 fig. 17; text-fig. VII.— Miller North Amer. Geol. and Pal., 1889, p. 287 

 (catalogue name).— Bather, List Blastoidea Brit. Mus. (Nat. Hist.), 1899, 

 p. 68 (catalogue name). 



Glavxbastus reinwardtii Hambach, Trans. Acad. Sci. St. Louis, XIII, 1903, p. 44 

 (catalogue name). 



The original description by Troost is as follows : 



Elongated, inverted pyramidal. Ambulacra short, not composed as [in] the pre- 

 ceding species of uniform transverse grooves, but of oblique alternating devisions, 

 having the pores remote from the margin of the Ambulacra. 

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