246 Prof. J. W. Gregory — Fossil Echinoicha 



II. — Fossil Echinoidea from Sinai and Egypt. 



By J. "W. Gregory, D.Sc, F.R.S., F.G.S., 

 Professor of Geology, Glasgow University. 



(PLATE XI.) 



{Concluded from the Maij Number, p. 227.) 



Order ATELOSTOMATA. 

 Suborder ASTERN AT A. 

 Family NUCLEOLITID^. 



1. NucLKOLiTES WALTHEKi (Gautliier), 1900. 



EchUwlrissiis xcaltheri, Gautliier, in Foui-tau : Notes E'ch. foss. E'gvpte, Cairo 

 (1900), p. 21, pi. L, figs. 8-10. 



Dlstrihution. — " Santouian " : Berak el Gazal. near Abu Eoash 

 (Fourtau). "Eocene": Abu Eoash district. L 1379. Coll. H. J. L. 

 Beadnell, Esq. A young broken specimen, east end of the 

 Cretaceous area, near Abu Koash village. I 3796. Coll. H. J. L. 

 Beadnell, Esq. 



2. NucLEOLiTES DAGLENSis (Gautliier), 1SS9. 



£chitwl>rissiis daffleiisis, Gautbicr, 1SS9: E'ch. fuss. Sud ILuits-Pluteaux Tunisle, 

 p. 41, pi. ii, figs. 24-26. 



Distribution. — Cenomanian, " and perhaps also Lower Turonian": 

 Southern Tunis. Marls : lower half of Jebel el Araba, Wadi el 

 Araba, south-westward of Camp 23. L 4120. Coll. by the late 

 T. Barron, Esq. Jebel um Kaiyig, north-eastern Sinai. L 0481. 

 Collected by Dr. W. F. Hume. 

 Dimensions : 



Iiit/iiesi 

 daglensis (Gautliier). (Laitefs figure), 



mm. mm. mm. mm. mm. mm. mm. 



Lenffth ... 19-5 19 ... 13 14 Ui 19 ... 18 

 Breadth ... IS 17 ... 10 11-5 13 16 ... 15 



Height ... 9 8 ... 6 7 9 11 ... 9-5 



It is necessary to compare this species with iY. hujnesi, Cott.,^ from 

 Mt. Hor, which diflers by the more undulating lower surface, and 

 the more anterior position of the highest point in the test. 



3. NucLEOLiTES GiBBOSA (Perou & Gauthier), 1879. 



Echinoh-isms gibhosus, Peron & Gautliier: E'ch. foss. Alger., fasc. 5 (1879), p. 148, 

 pi. X, figs. 1-4. 



The collection includes three specimens, which agree most closely 

 with the above species ; but they appear to me to be possibly only 

 variations of N. daglensis. 



' Cotteau, E'ch. foss. recueillis . . . Lartet . . . voyage . . . due de Luj-ncs: 

 Bull. Soc. geol. France, ser. ii, vol. xxvi (1869), p. 535, fig. p. 534. Lartet; 

 Explor. geol. Mer Morte (1877), p. 153, pi. xiii, figs. 15-19. 



