166 GONIOPHORUS 



the carinated structure, superadded to the surface of the disc, which forms one of the most 

 distinctive characters of this group. 



The genus Goniophorus resembles Peltastes in the arrangement of the elements of the 

 apical disc and the relative position of the periprocte to the axis of the body. It is distin- 

 guished from it, however, in the absence of sutural impressions, and the presence of 

 prominent ribs, that divide the surface of the pentagonal disc into a number of 

 triangular areas (PI. XXXVI, figs. 1 and 2). 



M. Cotteau 1 has added another character, which he considers of more importance than 

 the preceding ; and observes, " The structure of the ambulacra presents a difference 

 much more important, and the existence of poriferous impressions at the base of some of 

 its granules form a type certainly exceptional, which ought to have a place apart in the 

 Family Salenid^. This character has not hitherto been noticed in any other Echinid." 



Goniophorus lunulatus, Agassiz, L838. PI. XXXVI, fig. 1 a — d, fig. 2 a — d. 



Goniophorus lunulatus, Ayassiz. Monogr. des Salenies, p. 30, pi. v, figs. 17 — 2-1, 



1838. 



— apiculatus, Agassiz. Ibid., p. 32, pi. v, figs. 25 — 32, 1838. 



— — Agassiz. Catal. Ectyp. Foss., p. ii, 1840. 



— favosus, Agassiz, MS. Morris's Catal. of British Fossils, p. 52, 



1843. 



— lunulatus, Morris. Catalogue of British Fossils, p. 52, 1843. 



— — Agassiz et Desor. Catal. raison. des Ecliinides, Ann. des 



Sc. Nat, 3e serie, t. vi, p. 343, 1846. 



— apiculatus, Agassiz et Desor. Ibid. 



— • — Bronn. Index Paleeontol., p. 548, 1849. 



— favosus, Bronn. Ibid. 



— lunulatus, Bronn. Ibid. 



D'Orbigny. Prod, de Pal. strat., t. ii, p. 1/9, 1850. 



— apiculatus, D"Orbigny. Ibid. 



— favosus, D'Archiac. Hist, des Progr. de la Geol., t. iv, p. 51, 1851. 



— lunulatus, Bronn. Lethsea geogn., t. ii, p. 184, pi. xxix, fig. 6, 1852. 

 Salenia lunulata, Morris. Catal. of Brit. Foss., 2 ed., p. 89, 1854. 

 Goniophorus apiculatus, Desor. Synopsis des Ecliinides Foss., p. 14, pi. xx, 



fig. 12, 1856. 



— lunulatus, Pictet. Traite de Paleontol., t. iv, p. 248, 1857. 



— apiculatus, Pictet. Ibid., pi. xcvii, fig. 3, 1857. 



— lunulatus, Cotteau. Paleontol. Franchise, t. vii, pi. 1029, figs. 8 — 19, 



1864. 



' ' Palcontologie Francaise,' t. vii, p. 126, Terrain cretace. 



