NO. 3 CASSIDULOID ECHINOIDS — KIER 197 



doubt single pored. Cotteau's artist almost invariably showed double 

 pores in the phyllodes whether they were double or single. 



Occurrence. — Miocene, Chavagnes, Martigne, Doue (Maine et 

 Loire), France, 



Genus TERMIERIA Lambert 



Tcrmieria Lambert, 1931. Mem. Soc. Geol. France, vol. 7, pp. 30-31. Type 

 species by original designation, Tcrmieria henrici Lambert. 



GENERIC DESCRIPTION 



Small, elongate, apical system monobasal; petals broad, unequal, 

 petal III short, pores conjugate ; ambulacral plates beyond petals 

 single pored; periproct inframarginal, round; peristome anterior, 

 round ; bourrelets and phyllodes slightly developed, phyllodes single 

 pored; buccal pores present. 



Comparison with other genera. — Lambert placed this genus in the 

 archiacids presumably because of the short petal IIL However, this 

 genus is not similar to Archiacia. Its shape, petal arrangement, apical 

 system, and phyllodes are completely different. It is most similar to 

 Pliolampas, but differs in having a round peristome, narrower phyl- 

 lodes with fewer pores, and a shorter petal III. 



Remarks. — It is possible that the only two specimens known of 

 the type species of this genus are immature, and that some of the 

 characters considered to be generic would not occur in mature speci- 

 mens. Petal III in the lectotype is very short relative to the other 

 petals. In a larger specimen, it would not be so short in proportion 

 to the other petals. Only the difference in the number of pore pairs 

 would remain constant. In the lectotype, there are seven more pore 

 pairs in petals II and IV than in petal III (i6 in petals II and IV, 

 9 in petal III). However, in a larger specimen, although the differ- 

 ence in the number of pore pairs would remain the same (Kicr, 1957, 

 p. 851), the proportional difference between the number of pore pairs 

 and, therefore, between the length of the petals, would change. For 

 example, if there were 32 pore pairs in petals II and IV, there would 

 be 25 in petal III, and it would, therefore, be much longer relative 

 to the other petals than it would be in a smaller specimen. The lack 

 of crowding of the phyllodal pores and the small number of sphaeridia 

 in the type specimens may be further evidence that these specimens 

 are immature. Larger specimens, if they occurred, may have had 

 crowded phyllodes and many more sphaeridia. In a growth series 

 in Echinolampas fraasi De Loriol (Kier, 1957, p. 851), specimens of 



