NO. 3 CASSIDULOID ECHINOIDS — KIER 53 



referred it to Astrolampas. This species should be referred to 

 Pygorhynchiis. B. coquandi does not have an inframarginal periproct 

 and cannot be an Astrolampas. Being Senonian, it probably has 

 single-pored phyllodes and should be referred to Parapygiis. 



Range and distribution. — Cretaceous (Valanginian to Cenomanian) 

 of Europe and Syria. 



DESCRIPTION OF TYPE SPECIES 

 ASTROLAMPAS PRODUCTUS (Agassiz) 



Plate 4, figures 5-7 ; text figures 26, 27 



Pyguriis productns L. Agassiz, 1836a, Mem. Soc. Sci. Nat, Neuchatel, vol. i, 

 p. 135. 



Shape. — Large, holotype 58 mm. long, elongate, slightly pointed 

 posterior, smoothly rounded anterior margin, very low, with greatest 

 height anterior at apical system ; adorally depressed with inter- 

 ambulacra slightly inflated. 



Apical system. — Anterior, tetrabasal (text fig. 26), genital 2 large, 

 extending posteriorly, separating genital plates 4 and i but not sep- 

 arating posterior oculars V and I ; other genital plates small. 



Ambulacra. — Petals well developed, broad, equal, lanceolate, ex- 

 tending almost to margin, with slight tendency to close distally; 

 interporiferous zones broad, three times width poriferous zones; 

 poriferous zones wide; outer pore slitlike, inner pore round; pores 

 conjugate, 



Periproct. — Inframarginal, longitudinal. 



Peristome. — Anterior, depressed, pentagonal, slightly higher than 

 wide. 



Floscelle. — Bourrelets slightly developed ; phyllodes extremely long, 

 double pored (text fig. 27) with pore pairs arranged in two series 

 in each half -ambulacrum: approximately 15 pore pairs in each outer 

 series, 10 in each inner, with pore pairs arranged longitudinally in 

 inner series, transversely in outer ; no buccal pores. 



Tubercidation. — Tubercles on adoral surface slightly larger than 

 on adapical. 



Occurrence. — Lower Cretaceous (Neocomian) of France and 

 Switzerland. 



Location of type specimen. — Museum of Comparative Zoology, 

 Harvard, No, 804. 



i?^mar^.?.— d'Orbigny's (1856, pi. 918, fig. 2) figure of the adoral 

 surface of this species is erroneous in showing inflated bourrelets 

 which project into the peristome, and greatly widened phyllodes. 



