I04 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I44 



FlosccUe. — Bour relets moderately developed ; phyllodes (text fig. 

 86) single pored, broad, 7 or 8 pores in each outer series, 2 or 3 in 

 each inner series ; buccal pores present. 



Tuberculation. — Narrow, naked, granular zone adorally in inter- 

 ambulacrum 5. 



Occurrence. — Upper Cretaceous (Senonian) of Aftab, Persia. 



Location of type. — Probably in Cotteau Collection, ficole des 

 Mines, Paris. 



Remarks. — This species was considered by Lambert and Thiery 

 (1921, p. 352) and Mortensen (1948, p. 143) congeneric with 

 Parapygtis cotteauanus. I agree with their conclusions, as both species 

 have the same elongate, inflated shape with greatest width posterior 

 to center, and similar short petals with anteriorly very eccentric 

 apical system. Their phyllodes differ slightly, with fewer pores in P. 

 longior. 



Synonym of PARAPYGUS 



Rostropygus Szorenyi, 1955. Geol. Hung., p. 66. Type species by original 

 designation, Rostropygus annae Szorenyi. 



Remarks. — I have not seen any specimens of the type species, but 

 Dr. Szorenyi very kindly sent me some photographs and a cast of 

 the holotype. Szorenyi distinguishes her genus by its projecting 

 posterior margin. However, the type species is so similar in petal 

 arrangement and shape to Parapygus that this character does not 

 seem of sufficient importance to warrant the maintenance of a sep- 

 arate genus for it. 



Genus ARNAUDASTER Lambert 



Arnaudaster Lambert, 1918. Mem. See. Acad. Aube, ser. 3, vol. 82, p. 32. All 

 previous workers including Lambert and Thiery (1921, p. 353), Mortensen 

 (1948, p. 157), and Neave (1939, p. 301) have attributed this genus to Lambert 

 (1920a). However, he mentioned the genus in 1918 with a diagnosis in a 

 footnote, and that date must be considered the date of its publication. Type 

 species, Arnaudaster gauthicri Lambert by subsequent designation, Lambert, 

 (1920a, p. 152). 



GENERIC DESCRIPTION 



Medium size, elongate, subcylindrical, apical system anterior, ap- 

 parently tetrabasal but sutures not clear on holotype, four genital 

 pores; petals well developed, broad, closing distally, with unequal 

 poriferous zones, pores conjugate, single pores in ambulacral plates 

 beyond petals ; periproct marginal, longitudinal ; peristome anterior, 



