NO. 3 CASSIDULOID ECHINOIDS — KIER 195 



with large single pores (text fig. 162) in two series in each half- 

 ambulacrum : five or six pores in each outer series, one or two in 

 each inner ; buccal pores present. 



Tuberculation. — Adorally, tubercles slightly larger than adapically ; 

 no naked medial zone in interambulacrum 5. 



Occurrence. — Miocene (Langhian), St. Restitut, Drome, France. 



Location of type specimens. — Lectotype and figured paratype in 

 Lambert Collection, Sorbonne, Paris. 



Synonym of PLIOLAMPAS 



Breynclla Gregory 1891. Trans. Roy. Soc. Edinburgh, vol. 36, pt. 3, No. 22, 

 p. 600. Type species Pygorhynchiis vassalli Wright, by subsequent designation, 

 Cooke (1942, p. 38). 



DESCRIPTION OF TYPE SPECIES 



PLIOLAMPAS VASSALLI (Wright) 



Plate 37, figures 1-4; text figure 164 



Pygorhynchiis vassalli T. Wright, 1855. Ann. Mag. Nat. Hist., ser. 2, vol. 15, 

 pp. 271-272. 



Material. — I have studied the lectotype (British Museum No. E. 

 1581) designated by Gregory (1891, p. 602), and one other well- 

 preserved specimen in the same museum. 



Shape. — Small to medium size, elongate, greatest width posterior 

 to center, adapical surface flat, margins vertical, peristome depressed. 



Apical system. — Anterior, compact (pi. 37, fig. 2), with three large 

 genital pores, genital 3 not pierced ; ocular plates small. 



Ambulacra. — Petals broad, with wide poriferous zones, narrow 

 interporiferous ; pores strongly conjugate, outer pore obliquely elon- 

 gated, inner pore round ; petal III widely open, other petals closing 

 slightly distally; petals V and I longer than others. 



Periproct. — Marginal to slightly inframarginal, longitudinal. 



Peristome. — Anterior, higher than wide ; pentagonal. 



Floscelle. — Bourrelets well developed; phyllodes single pored (text 

 fig. 164), with pores arranged in two series in each half -ambulacrum, 

 approximately six pores in each outer series, two in each inner ; 

 buccal pores present. 



Ornamentation. — Adorally, tubercles slightly larger than adapi- 

 cally; no naked, pitted zone in interambulacrum 5, 



Occurrence. — Miocene (Globigerina limestone) of Malta. 



Location of type specimen. — British Museum (Natural History). 



