NO. 3 CASSIDULOID ECHINOIDS — KIER 221 



Occurrence. — Upper Eocene, Zoui (Department of Constantine), 

 near frontier of Tunisia. Lambert (1911b), p. 184) refers specimens 

 to this species from Grangeot, near Fabrezan, and near Coustouge, 

 Aube, France. 



Location of type specimen. — Unknown. 



Remarks. — Cotteau (1887, p. 473, pi. 126, fig. 4) describes and 

 figures the apical system as tetrabasal. In all the specimens I studied, 

 including the one figured by Cotteau, the apical system was mono- 

 basal. Cotteau (op. cit., pi. 126, figs. 3-5) shows pore pairs in 

 ambulacrum III adapically and pore pairs in the phyllodes. This is 

 an error, for all the ambulacral plates in ambulacrum III, and in the 

 ambulacral areas beyond the petals, and in the phyllodes are single 

 pored. 



Synonym of PSEUDOPYGAULUS 



Eolampas Duncan and Sladen, 1882, Pal. Indica, ser. 14, vol. i, p. 61. Type 

 species by monotypy, Eolampas antecursor Duncan and Sladen. 



Material. — I have not seen any specimens of the type species. The 

 type specimen is at the Geological Survey of India (personal com- 

 munication from V. R. Khedker). Pictures of this specimen were 

 very kindly sent to me. I have studied specimens of F. excentriciLS 

 (Duncan and Sladen), a species considered by Duncan and Sladen to 

 be congeneric with their P. antecursor. These specimens are at the 

 Exeter Historical Museum, Exeter, England, and in the Museum 

 National d'Histoire Naturelle, Paris. 



Remarks. — When Duncan and Sladen erected their genus Eo- 

 lampas, they were not aware of Pseudopygaulus, or did not consider 

 it a valid genus. In 1887 they stated that Pseudopygaulus and 

 Eolampas were synonymous, and all later authors have agreed. The 

 only controversy has been over which name had priority. 



Both type species are very similar, having a small test, nonpetaloid 

 ambulacrum III, broad petals, inframarginal and transverse periproct, 

 oval peristome, slightly developed bourrelets, and single-pored phyl- 

 lodes with slight crowding of the pores. They diflfer in that the petals 

 in P. antecursor and P. excentricus have narrower poriferous zones, 

 a character probably not of sufificient significance to warrant main- 

 tenance of Eolampas as separate from Pseudopygaulus. I have 

 included a drawing of the phyllode, and of the apical system (text 

 figs. 180, 181), and photographs (pi. 43, figs. 1-4) of P. excentricus. 



