. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. Fig. (i â litiin- inelUi. Anterior side. ; hammelli n. ip. Niagara Gr. Body snli globose, flattened on the anterior side ; \ sessile, no perforation for a colum:' j I basals seven; between the flrst ami I second se- I ries ihert ' are f i v o plates in⢠; serted on I the poste- [ r i o " side ; j ten plates ' in the sec- I ond series; â ten in the I third; nine I in the I fourth, and i nin
. North American geology and palaeontology for the use of amateurs, students, and scientists [microform]. Paleontology; Paleontology; Geology; Paléontologie; Paléontologie; Géologie. Fig. (i â litiin- inelUi. Anterior side. ; hammelli n. ip. Niagara Gr. Body snli globose, flattened on the anterior side ; \ sessile, no perforation for a colum:' j I basals seven; between the flrst ami I second se- I ries ihert ' are f i v o plates in⢠; serted on I the poste- [ r i o " side ; j ten plates ' in the sec- I ond series; â ten in the I third; nine I in the I fourth, and i nine in the fifth, which se- ries reaches the mouth; above these there areeiglit plates in the series which bore the um- bulacral spines, and some smaller plates surrounding the ambulacral orifice on the summit; four cicatrices for amlni- lacral spines; mouth at the margin of the sum- mit ; anal opening in the plate adjoining the mouth and be- tween it and the amb ula- crai orifice; all the plates 1)0- riferons in pairs; i) w the ante- rior side below the mouth there is one p ate in the third series, and one in tlie fourth series, each bearing a prominent tubercle, witli a circle of pores passing through it, giving it a radiate appear- ance on top; this character may not he of specific importance, but the tuberclen are different from those observed on other specimens. Collected by J. F. Hammell, in County, Indiana, in wiiose honor I have given the specific name. jolietensib S. A. Miller, 1882, Jour. Cin. Soc. Nat. Hist., vol. f*, p. 223! Niagara (ir. ornatus, S. A. Miller, 1878, Jour. ('in. Soc. Nat. Hist., vol. 1, p. 132, Niagara (\ i. ovatus, Hall, 1864, 20th Rep. N. Y. St. Mus. Nat. Hist., p. 367, Niagara (Jr. perlongus, S. A. Miller, 1878, Jour. Cin. Soc. Nat. Hist., vol. 1, p. 132, Niagara (ir. plenus, S. A. Miller, 1878, Jour. Cin. ,'^nc. Nat. Hist., vol. 1, p. 135, Niagara (ir. pustulosus, S. A. Miller, 1878, Jour. Cin. Soc. Nat. Hist., vol. 1, p. 134, N
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Keywords: ., boo, bookcentury1800, booksubjectgeology, booksubjectpaleontology
