130 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I44 



questionably referred to Faujasia. There is no doubt that this species 

 is congeneric and probably conspecific with Pygidiolanipas eurynota. 

 They are identical in all characters. If more and better specimens 

 of the species were available, I am certain they would prove to be 

 conspecific. Specimens of the two species have been collected in 

 rock of approximately the same age. Pygidiolmnpas eurynota was 

 supposed to have been collected in the Aliocene at the Grove Planta- 

 tion, Cooper River, near Charleston, S. C. However, the matrix in 

 the holotype is a glauconitic sandstone, whereas the other echinoids 

 collected at the Grove Plantation are preserved in a yellow marl. 

 According to Dr. Norman Sohl. who is the authority on this region, 

 this glauconitic sandstone is identical to that found in the Campanian 

 Peedee formation. The specimen of Pygidiolanipas geomctricus was 

 collected at what was reported to be the Marshalltown formation at 

 the north side of the Chesapeake and Delaware Canal. 2,000 feet 

 east of the railroad bridge. Later workers (Groot, Organist, and 

 Richards, 1954) have considered this locality to be either Navesink 

 or !Mt. Laurel. According to Stephenson et al. (1942) and confirmed 

 by Dr. Sohl in personal communication, these two formations are 

 equivalent in age to the Peedee formation. 



Range and distribution. — L'pper Cretaceous (Campanian) of Soutli 

 Carolina and Delaware. 



DESCRIPTION OF TYPE SPECIES 



PYGIDIOLAMPAS EURYNOTA Clark 



Plate 20, figures 2-4; text figure 112 



Pygidiolamf'as eurynota Clark. 1923. Bull. Mus. Comp. Zool., vol. 65, pp. 346- 

 348. text fig. 2. 



Material. — The holotype and only known specimen was studied. 



Shape. — Aledium size, holotype 46 mm. long, marginal outline 

 circular except for pointed posterior : adapical surface inflated, 

 adoral flat. 



Apical system. — Central to slightly anterior, tetrabasal. 



Ambulacra. — Petals broad, equal, extending over two-thirds dis- 

 tance to margin, closed, with very wide interporiferous zones tapering 

 distally; poriferous zones wide with outer pore of pore pair slitlike, 

 inner slightly elongated transversely, pores conjugate. 



Pcriproct. — Inframarginal. very small, longitudinal. 



Peristome. — Central, pentagonal, 



Floscellc. — P.ourrelets strongly developed, projecting into peristome. 



