290 
THE GEOLOGIST. 
present seas) and a new species of rcntacrinites {P. rohustufi, Wright). 
Here, too, at the base of the Murlstonc, Mr. Oavcy found two previously 
undescribed forms of star-fish, the Uraster Gaveiji and the Tropidaster 
2}ecti)iafus, both of -which were figured and described by the late lamented 
Professor ]Cdward Forbes, in the 3rd Decade of the Geological Survey. 
With them he obtained an entire and beautiful large Cidaris Edwardsii 
(Wright), with the attached spines, a rarity in this condition in any 
formation, and especially in the Lias, where Eehinoderms are very 
scarce ; although we have met with specimens of some small species, 
with the spines attaclied, iu the upper, middle, and lower Lias. 
These fossil star-fish aie often obtained grouped together, as living ones 
are now, with their short spines adhering to the rays. Indeed, they 
seem to have been more than usually abundant at this spot — at least, 
such is the case with the TropidasUr pecUmlus. Two or three species 
of small Crustacea, chiefly belonging to the genus Astacus, were also pro- 
cured there in the argillaceous nodules, irregularly distributed throughout 
the clay. The most interesting we have seen is one in our possession, 
nearly allied to the recent genus uiEga, belonging to the order Isopoda, 
and which, like others of this group, was probably parasitic upon fish. 
There were also a great number and variety of marine shells in a re- 
markably good state of preservation, and these were equally abundant 
at Hewlett's Hill, some of them retaining the actual shell. Although 
the railway at Campden has been long since finished, and the excava- 
tions for the reservoirs at Hewlett completed, the spoil- banks are well 
worth a careful search, and many pretty specimens may still be ob- 
tained. This portion of the Lias is particularly rich in fossils wherever 
it occurs ; only, from its position iu Gloucestershire, it is seldom ex- 
posed, and therefore cannot be so often searched as the Marlstone and 
the lower Lias. Similar beds were laid open in Northamptonshire during 
the construction of the famous Kilsby tunnel; and the organic remains 
there detected were nearly identical, and equally abundant. Among 
the most characteristic shells at all these localities, the following may 
be mentioned — Tlioladomya Murclmonicn, Cardiim tnmcaUm, Plicaitila 
spinosa, Modioh scalprum, Area Biiclcmani and J. pulclira, Peden 
ccquivalvis, Perna {C'renatula) veyiirieosa, Lcda rostralis, Hippopoiium 
n.s., Nucula, showing cast of the intestinal canal ; Troclats imhricahis, 
Ammonites ITenleyi, A. planicostatus, and a small grooved Belcmnitc. 
Many of these arc grouped together in clusters, especially Cardium 
