156 Dr. J. W. Gregory — Egyptian Echwoidea. 



Las a high test of much the same form as E. tumidopetcJum ; but the 

 petals are nmch broader, shorter, and more leaf-like, and the floscelle 

 less conspicuous. 



2. EcHiNOLAMPAS GLOBULUS, Laube, 1869. 



" Ech. vicent. Tert. Geb. " : Denk. Ak. Wiss. Wien, vol. xxix, pt. 2 

 (1869), p. 24, pi iv, fig. 5. 



Distribution. — Lower Eocene — Libyan Series: near Assiut, 

 Ec>7pt (De Loriol-le-Fort) ; Coll. Geol. Surv. Egypt, No 631. 



Ten specimens of this variable species from the Lower Eocene 

 near Assiut. 



3. ECHINOLAMPAS AMYGDALA, DeSOr, 1847. 



Agassiz & Desor, " Cat. Raiss." : Ann. Sci. nat., Zool., ser. 3, 

 vol. vii, p. 164. 



There is one echinid in the collection (ex Nos. 862-3) the pro- 

 portions of which agree with those of the Egyptian specimen, w^hich, 

 according to De Loriol, is the typical form of this species. The 

 species was based by Desor on an Egyptian fossil. The dimensions 

 are as follow : — 



Distribution. — Mokattara Series : Mokattam (De Loriol-le-Fort). 

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



4. EcHiNOLAMPAS Perbieri, De Loriol, 1881. 

 Mem. Soc. Phys. Hist. nat. Geneve, vol. xxvii, p. 95, pi. v, fig. 2. 



Distribution. — Mokattam Series: Mokattam, Thebes (De Loriol- 

 le-Fort) ; Coll. Geol. Surv. Egypt, ex No. 859. 



The collection includes a small specimen from the Mokattam 

 Series, which appears to be referable to £. Perrieri, Lor., though that 

 species was described from the Upper Eocene beds of the Siuah 

 Oasis. M. de Loriol-le-Fort did, however, record a doubtful speci- 

 men from the Mokattam beds of the Beharieh Oasis. 



Tlie dimensions are as follow : — 



De Loriol. Egypt. Geol. Surv., 



ex No. 859. 

 46 mm. 

 38 ram. 



Length 52-62 mm. 



Breadth ... ... ... — 



Eatio of breadth to length ... ^82 •SS 



Height — 20^5 mm. 



Eatio of height to length ... •42-^45 ^44 



5. EcHiNOLAMPAS LiBYCus, De Loriol, 1883. 



" Beitr. libysch. Wiiste," vol. ii, pt. 1, p. 31, pi. v, figs. 1-3. 



Distribution. — Mokattam Series: Siuah (De Loriol-le-Fort); 

 Coll. Geol. Surv. Egypt, one specimen ex No. 859. 



No. 859 in the Egyptian Survey Collection includes two specimens 

 which are clearly specifically distinct. The larger specimen has the 



