268 



ECHINODERMA 7 A. 



[PEN. — PER- 



Fig. 385.— Pen t rem I tes 

 god on i. 



gemmiformis, Hambach, 1884, Trans. St. 



Louis Acad. Sci., vol. 4, p. 548, Kas- 



kaskia Gr. 

 globosus, Say, as identified by Troost, 1850, 



probably Pentremites sulcatus. 



godoni, DeFrance, 

 1818, Diet. Sci. 

 Nat., t. 14, p. 

 467, Kaskaskia 

 Gr. 

 granulatus, see 

 G ranatocrinus 

 granulatus. 

 grosvenori, S h u- 



mard, see Troostocrinus grosvenori. 

 hemisphericus, Hambach, 1880, Trans. 



St. Louis Acad. Sci., vol. 4, p. 145, Kas- 

 kaskia Gr. 

 kentuckiensis, see Codaster kentuckienpis. 

 koninckanus, Hall, 1858, Trans. Alb. Inst., 



vol. 4, p. 4, and Geo. Sur. Iowa, p. 656, 



Warsaw Gr. 

 laterniformis, Owen & Shumard, 1850, 



Jour. Acad. Nat. Sci, 2d series, vol. 2, p. 



66, Kaskaskia Gr. 

 leda, Hall, see Granatocrinus leda. 

 linealw, see Troostocrinus lineatus. 

 longicostalis, Hall, 1860, Supp. to Geo. 



Iowa, p. 85, Warsaw Gr. Not satisfac- 

 torily defined, 

 lycorias, Hall, 1863, 16th Rep. N. Y. St. 



Mus. Nat. Hist,, p. 123, Ham. Gr. 

 maia, Hall, 1862, 15th Rep. N. Y.St. Mus. 



Nat. Hist., p. 122, Ham. Gr. 

 melo, see Granatocrinus melo. 

 missouriensis, Swallow, 1863, Trans. St. 



Louis Acad. Sci., vol. 2, p. 81, Kas- 

 kaskia Gr. 

 nodosus, Hambach, 1880, Trans. St. 



Louis Acad. Sci., vol. 4, p. 145, Kas- 

 kaskia Gr. 

 norwoodi, see Granatocrinus norwoodi. 

 obesus, Lyon, 1857, Geo. Sur. Ky., vol. 3, 



p. 469, Kaskaskia Gr. 

 obliquatus, see Tricoelocrinus obliquatus. 

 waits, Owen. Notde- ^ 



fined, 

 potteri. Ham bach, 



1880, Trans. St. 



Louis Acad. Sci., J- 



vol. 4, p. 156, Bur- 

 lington Gr. 

 pyriformis, Say, 1825, 



Jour. Acad. Nat. & 



Sci. Phil., vol. 4, p. 



294, Kaskaskia Gr. Fia. 386.— Pentremites 

 reinwardti, Troost, pyriformis. Ventral 



see Troostocrinus "K e; d ' deltoid 



reinwardti. 

 robustus, Lyon, 1860, Trans. St. Louis 



Acad. Sci., vol. 1, p. 629, Kaskas- 

 kia Gr. 

 roemeri, see Granatocrinus roemeri. 

 sampsoni, Hambach, 1884, Trans. St. 



Louis Acad. Sci., vol. 4, p. 548, Choteau 



or Waverly Gr. 

 tayi, see Schizoblastus sayi. 

 sirius, White, 1862, Proc. Bost. Soc. 



Nat. Hist., vol. 9, p. 20, Burlington Gr. 



spinosus, Hambach, 1880, Trans. St. Louis 

 Acad. Sci., vol. 4, p. 145, Kaskaskia Gr. 



ttelliformis, see Oropliocrinua stelliformis. 



subconoidcus, Met k, 1873, Hayden'a Gto. 

 Sur. Terr., p. 471, Subcarb. 



Fig. 387.— Pentremites pyriformis. One shows 

 the deltoid plates extended to the summit. 



subcylindricus, see Troostocrinus subcylin- 

 dricus. 



subtruncatus, see Troostocrinus suhtrun- 

 catus. 



sulcatus, Roemer, 1862, Monog. Blas- 

 toid., p. 354, Kaskaskia Gr. 



symmetricus, Hall, 1858, Geo. Rep. Iowa, 

 p. 694, Kaskaskia Gr, 



tennesseese, TrooBt. Not defined. 



troosti, Shumard, 1866, Trans. St. Louis 

 Acad. Sci., vol. 2, p. 386, Kaskaskia <ir. 



truncatus, Conrad, 1843, Prop. Acad. Nat. 

 BcL Phil., vol. 1, p. 334, Wat saw (ir. 



varsouviensis, see Tricoelocrinus varsou- 

 viensis. 



vtrneuili, see Nucleocrinus verneuili. 



whitii, Hall, 1862, 15th Hep. N. Y. St. 

 Mus. Nat. Hist., p. 122, Ham. Gr. 



voodmani, see Triccelicrinus woodmani. 



uortheni, see Triccelicrinns wortbeni, 

 Pentremitidea D'Orbigny, 1849, Prodr. d. 

 Palennt, t. 1, p. 102. [Ety. from Pen- 

 tremites.] Number and disposition of 

 plates as in Pentremitts, but the del- 

 toids are inconspicuous, confined to 

 the summit, rarely visible in a side 

 view ; spiracles large. It is also closely 

 connected with Troostocrinus, and is of 

 doubtful generic value. Type P. 

 scbultzi. 



americana, Barris, 

 Geo. Sur. 111., vol 

 363, Ham. Gr. 



filosa, Whiteaves, 

 Cont. to Can. Pal 

 1, p. 104, Ham. Gr. 

 Perischodomus, McCoy, 

 1849, Ann. Nat. Hist., 

 vol. 3, p. 251. [Ety. 

 perischos, inclosing ; do- 

 mus, house.] Spheroidal, 

 subpentagonal ; ambu- 

 lacra narrow, two rows 

 of small plates imbricat- 

 ing downward, each 

 pierced by one pair of simple pores ; 

 interambulacra wide, with five rows of 



1887 

 , vol 



Fig. 388. — Pen- 

 t re in i t i dea 

 am er 1 c ana; 

 2diam. 



