Messrs. Jones and Kirkby on Carboniferous Entomostraca. 37 
stated that a band of freshwater limestone stretches from Nobold 
near Shrewsbury to Asterley beyond Pontesbury, and is found 
in the Coal-measures between Westbury and Pontesbury; and 
it is described as containing Cypris inflata, together with Spi- 
rorbis (Microconchus) carbonarius, and as being equivalent to the 
Ardwick limestone, in which this latter little fossil also abounds. 
This Spirorbis-limestone occurs also in the uppermost Coal- 
measures of Warwickshire. See Geol. Survey Memoirs, 1859. 
Mr. J. W. Salter has obtained for us, through the kind aid 
of Mr. R. Wilding, of Church-Stretton, a specimen of the 
whitish so-called “ freshwater” limestone of the Upper Coal- 
measures of Lee-Botwood, Shropshire. This contained a few 
specimens of a dwarf Leperditia and many minute Spirorbes * 
(Microconchi). Mr. E. W. Binney has also favoured us with 
specimens of the same Spirorbis-limestone from Ardwick, near 
Manchester ; Prizely, Shropshire; Rough Gill near Galescales, 
Carlisle ; and from the banks of the Ayr near Catrine, Ayrshire. 
Some of these specimens enclose imperfect imdividuals of the 
same dwarf Leperditia. In another specimen of the white lime- 
stone that we have seen in the Ludlow Museum, Spirorbis 
abounds, but no Entosmostraca are visible. 
On account of the compact and crystalline condition of this 
rock, it is very difficult to manipulate the little bivalve carapaces, 
or their representative casts.in the limestone; but, though not 
so successful as we wished, we had evidence of such a little 
Leperditia as that figured by Murchison and mentioned above ; 
and we have no doubt that this is very similar to L. Scoto- 
burdigalensis, its greater breadth or ventricosity alone dis- 
tinguishing it. Hence we may keep the varietal name L. mflata 
for the gibbous dwarf form of L. Okeni occurring in the south, 
whilst L. Scotoburdigalensis is an equally small, but less swollen, 
dwarf variety, found in the north of Britain, as well as m Ire- 
land. 
1839. M‘Coy.—In 1839 Professor F. M‘Coy figured and 
described as Entomoconchus Scouleri, in the Journal of the 
Geological Society of Dublin (vol. 1. p. 91, pl. 5. figs. a—e), a 
large globose bivalved Entomostracan, common in some parts of 
the Mountain-limestone, both of the British Isles and the Con- 
tinent. This form had already been recognized as occurring in 
the Mountain-limestone of Yorkshire (Bolland) by Professor 
John Phillips, and referred to by him in his ‘ Geology of the 
Mountain-Limestone District of Yorkshire,’ pages 240 and 251, 
as a “ Cypridiform shell,” but not described, though sketches of 
* Spirorbis (Microconchus) is abundant also in some of the limestones 
of the Middle and Lower Coal-measures and of the Limestone-shales 
(Ireland). 
