NO, 3 CASSIDULOID ECHINOIDS — KIER 75 



slightly larger than pores in plates beyond petals, details of pores 

 not clear on specimens studied, but according to d'Orbigny's figures 

 pores conjugate, slightly elongated transversely. 



Penproct. — Marginal, longitudinal, with slight groove extending 

 from periproct to adoral surface. 



Peristome. — Anterior, higher than wide, pentagonal. 



Floscelle. — Bourrelets well developed, inflated; phyllodes broad, 

 double pored, two series of pore pairs in each half-ambulacrum, 

 9 or 10 in each outer series, 4 or 5 in each inner (text fig. 59) ; inner 

 pore of each pore pair greatly reduced in size ; no buccal pores. 



Occurrence. — Cretaceous (Cenomanian), Bedoule, near Cassis, 

 France. 



Location of type specimen. — According to Cotteau (i860, p. 457) 

 the holotype is in the collection of M. Barges. 



Remarks. — Because of the great similarity of C. bargcsii to the 

 type species of Catopygus, C. carinatus, Penes tic ta is herein con- 

 sidered a junior subjective synonym of Catopygus. Both species 

 are strikingly similar in shape and size, and have almost identical 

 phyllodes with approximately the same number of pore pairs in 

 each series, and in both species the inner pore is much smaller than 

 the outer. They differ in that the petaloid pores are similar to each 

 other in C. bargesii, whereas in C. carinatus the outer is elongated. 

 Also, there are only three genital pores in C. bargesii, but four in 

 C. carinatus. 



Most authors including Mortensen (1948, p. 160) and Lambert 

 and Thiery (1921, p. 354) have considered Penesticia as a synonym 

 of Oolopygus. They were not aware that C. bargesii has double- 

 pored phyllodes, whereas the type species of Oolopygus, O. gracilis, 

 has single pores in its phyllodes. 



According to d'Orbigny's figures and Cotteau's description, there 

 is a small pore in genital plate 2. On all the specimens I have seen, 

 there is no pore in this genital plate. 



Genus PHYLLOBRISSUS Cotteau 



Fhyllobrissus Cotteau, 1859. £ch. foss., L'Yonne, vol. 2, p. 81. Type species, 

 Catopygus gresslyi L. Agassiz, 1839, by subsequent designation, Cotteau, i860 

 (Pal. franc., Cret.), p. 553. 



Synonyms: Anthobrissus Pomel; Asterobrisstis De Loriol. 



GENERIC DESCRIPTION 



Small, inflated, slightly angular marginal outline, with slightly 

 truncated posterior margin, adoral surface flat or somewhat depressed. 



