NO. 3 CASSIDULOID ECHINOIDS — KIER 69 



Peristome. — Slightly anterior, pentagonal, wider than high. 



Floscelle. — Bourrelets present ; phyllodes slightly broadened, double 

 pored, with 8 to lo pore pairs in each outer series, 5 to 7 in each 

 inner series in each half -ambulacrum (text fig. 51) ; no buccal pores. 



Occurrence. — Jurassic, Mar-Abda, at the bottom of the Ghazir 

 Valley, Syria. De Loriol considered this species Cenomanian because 

 of its association with radicles he thought to be of that age. Accord- 

 ing to Lambert and Thiery (1921, p. 343, footnote) these radioles 

 were misidentified, and all the other species described by De Loriol 

 from Mar-Abda belong to genera essentially Jurassic. 



Location of type species. — The lectotype and one paratype are in 

 the De Loriol Collection at the Museum d'Histoire Naturelle at 

 Geneve, Switzerland. 



Remarks. — Lambert and Thiery (1921, p. 343) and Mortensen 

 (1948, p. 131) considered Neoclypeus a synonym of Pseudosorella. 

 Its type species is very similar to the type species of Pseudosorella 

 and certainly congeneric with it. Both have broad tests, with long 

 petals, conjugate pores, periproct in contact with the apical system 

 and in a deep groove extending to the margin. Their floscelles are 

 very similar, with bourrelets, and with phyllodes with two series of 

 pore pairs in each half-ambulacrum. 



De Loriol states that the pores in the phyllodes are arranged in 

 two simple series. Mortensen (1948, p. 132) quoted this statement 

 and suggested that in this character P. syrica recalls Galeroclypeus. 

 However, the phyllodes are well developed in P. syrica, with many 

 pore pairs arranged in two series in each half-ambulacrum, whereas 

 there are no phyllodes in Galeroclypeus. 



Genus CLYPEOPYGUS d'Orbigny 



Clypeopygiis d'Orbigny, 1856. Pal. franc, Cretace, vol. 6, p. 201. Type species, 

 Clypeus paultrci Cottean by subsequent designation, d'Orbigny, 1858, op. cit., 

 p. 422. 



GENERIC DESCRIPTION 



Medium size, elongate, flat, greatest width posterior to center, 

 adapical surface flattened, adoral depressed ; apical system tetrabasal, 

 anterior ; petals equal, broad, open, outer pore elongated transversely, 

 all ambulacral plates double pored; periproct supramarginal, with 

 deep triangular groove extending from periproct to posterior margin ; 

 peristome anterior, pentagonal, width equal to height ; bourrelets well 



