Dr. J. W. Gregory — Egyptian Echinoidea. 157 



following dimensions, which are those of E. Libycus and E. sub- 

 cylindricus, Des. But the characters of the petals show that the 

 Eg-yptian Survey specimen is nearer to the former. The specimen 

 is broken at the posterior end, so the specific determination is 

 somewhat uncertain. 

 Dimensions. 



Length 

 Breadth 

 Eatio of breadth to length 



Height 



Eatio of height to length 



70 mm. 

 55 mm. 



•786 

 35 mm. 



•50 



6. EcniNOLAMPAs AMPLUS, Fuchs, 1883. 



"Beitr. Kenntn. Miocaenfauna Aegypt. " : Beitr. Geol. Pal. Lib. 



Wiiste, vol. i, p. 45, pi. xiv, figs. 5-8. 



Distribution. — Miocene : Siuah and Geneffe (Fuchs) ; Coll. 



Geol. Surv. Egypt, No. 643 ; near Wady Jiafifra, between Cairo 



and Suez, Camp No. 9. 



Genus EUPATAGUS, L. Agassiz, 1847. 

 1. EuPATAGUS CoTTEAUi, De Loriol, 1881. 



Mem. Soc. Phys. Hist. nat. Geneve, vol. xxvii, p. 139, pi. xi, 



figs. 8-10. 

 Distribution. — Libyan Series : near Thebes (De Loriol-le-Fort) ; 

 Coll. Geol. Surv. Egypt, ex Nos. 861 and 867. 



2. Eupatagus Libycus, De Loriol, 1883. 

 " Beitr. libysch. Wiiste," vol. ii, pt. 1, p. 52, pi. xi, fig. 4. 

 Distribution. — Libyan Series : El Guss Abu Said, west of 

 Farafrah (De Loriol-le-Fort) ; Coll. Geol. Surv. Egypt, three 

 specimens ex No. 868. 



Genus HYPSOPATAGUS, Pomel, 1883. 



1. ? Htpsopatagus Lefebvrei (De Loriol), 1881. 



Macropneustes Lefebvrei, De Loriol, 1881 : Mem. Soc. Phys. Hist. 



nat. Geneve, vol. xxvii, p. 131, pi. ix, figs. 7-9. 

 Jffypsospatangus Lefebvrei, Cotteau, 1886 : Pal. franQ. Terr, tert., 

 vol. i, Eoc. Ech., p. 96. 

 Distribution. — Libyan Series : near Assiut, Minieh, and El 

 Guss Abu Said, west of Farafrah (De Loriol-le-Fort) ; ? Assiut ; 

 Coll. Geol. Surv. Egypt, ex No. 631. 



The only specimen that may belong to this species is one that is 

 so much broken at the hinder end that it is not possible to determine 

 whether a fascicle was present. The shape of the petals is, however, 

 nearer to that oi Sypsopatagus than to Eupatagus. 

 2. HypsoPATAGUs, sp. 

 Libyan Series : Coll. Geol. Surv. Egypt, ex Nos. 862-3, 867. 

 There are two echinids in the collection which are elongate forms 

 of Hypsopatagus, but they are too ill-preserved for description. 

 The outline of one is shown on PL VI, Fig. 4, which presents 



