VOL. XVI. (2) PARIS—ECHINOIDS 145 
This diminutive echinoid has a somewhat extensive 
vertical range in the Lias. It oocurs most commonly, 
however, at two horizons, namely, in the Oxynotum-Beds 
of the Lower Lias, and the Padczferum-Beds of the Upper 
Lias. 
It was originally described as “ Echinus minutus” by 
Prof. James Buckman,’ who recorded it from the “ Upper 
Lias, Alderton Hill [Gloucestershire] - and Lias shales, in 
the vale between Cheltenham and Gloucester.” Speci- 
mens from the Upper Lias at Alderton Hill have been 
compared with some from the Oxynotum-Beds of Glou- 
cester Gas Works, but no difference in their structure 
has been detected, although the horizons are so widely 
separated. : 
There can be little doubt that this species is identical 
with Quenstedt’s Czdarites criniferus, which is from the 
same horizon. Its long hair-like radioles, so graphically 
represented by Quenstedt, are a frequent characteristic of 
the basal Upper-Lias shales of Gloucestershire, having 
been recently procured—sometimes in association with 
small portions of the test—from the well-section at “ The 
Herberts,” Painswick,” and that at King Street, Stroud, 
described by Mr Upton. 
Besides being found in the Oxynotum-Beds at Glou- 
cester, and in the Falciferum-Beds of Alderton Hill, this 
species has been obtained by Mr L. Richardson from 
deposits of raricostati hemera exposed in an excayation 
when the stream was diverted, near Prestbury-Park Farm, 
near Cheltenham, when the new railway-line (G.W.R.) 
was being constructed ; and from those of Zwrnert 
hemera at the clay-pit near Honeybourne Junction. 
1 Murchison’s “Outline of the Geology of the Neighbourhood of Cheltenham,’ 
ond ed., augmented and revised by H. S. Strickland and James Buckman (1844), p- 95- 
2 Proc. Cotteswold Nat. F. C., vol. xv., pt. 3 (1906), p- 208. 
3 Lbid., p. 201. 
