44 Messrs. Jones and Kirkby on Carboniferous Entomostraca. 
( Arenaceous shale,” Local. p. 100). Dark, fragile, shghtly 
micaceous shale, with Crinoids, Modiola (?), &c., and containing 
obscure valves and casts of Leperditia subrecta (?) and Kirkbya 
annectens, but nothing exactly corresponding to the figure. Prof. 
M‘Coy suggests that this “is perhaps Cypris Scotoburdigalensis 
of Hibbert ; but this dwarf form of L. Okeni, smaller even than 
the variety subrecta, would hardly match “ C. Hibbertii,’ which 
is stated to be “ frequently upwards of a line in length,” and 
“the largest species of Cythere of the Irish palzeozoic rocks” 
(though “ C. inflata” is said to reach 2 lines in length), except 
when regarded as one of the modifications of DL. Okeni, which 
we believe to be the correct view of its relationship, though not 
contemplated in the work before us. 
13. “ Cythereimpressa. Yellow Sandstone; Dromard, Drapers- 
town. Synops. p. 166, pl. 23. fig. 16; Local. p. 48 (‘ Are- 
naceous shale,” Local. p. 100). Grey, fine-grained, micaceous, 
hardish shale, with Modiola (?) and Serpula. Some obscure 
casts of Leperditia subrecta and of other Entomostraca are pre- 
sent; but there is nothing exactly like the figure, which is 
stated to represent a form “about half a line long, and “ very 
common in the slates and shales of several districts ( p. 166). 
14. “ Cythere inflata. Lower Carboniferous Limestone ; 
Ballyduf, Dungarvon, co. Waterford.” Synops. p. 167, pl. 23. 
fig. 17; Local. p. 68. Grey crystalline shelly limestone, veined. 
Without any visible specimen of Entomostraca. 
14, White crystalline limestone, from Laracor, Trim, co. 
Meath (Local. p. 68). This has a small Entomoconchus and a 
minute hollow mould where. a Leperditia subrecta has probably 
been. The figure may have been taken from a small Entomo- 
conchus, a Cypridella, or other nearly related Cypridine Ento- 
mostracon. 
Prof. M‘Coy states that his “ C. inflata” is the “largest and 
most abundant ” of the Carboniferous Cytheres (from 1 to 2 lines 
in length), and that it abounds in the dark fcetid limestones, 
but is “ rare in the light-coloured limestone, where C. inornata 
supplies its place.” 
15. “ Cythere inornata. Yellow Sandstone; Cultra, Holy- 
wood.” Synops. p. 167, pl. 23. fig. 18; Local. p. 48 (‘ Are- 
naceous shale,” Local. p. 100). Bluish-grey fissile shale, fine- 
grained and micaceous, with numerous casts and broken valves 
(s to z's mch long) of Leperditia subrecta and L. Scotoburdi- 
galensis, sometimes showing the ae spot. Prof. M‘Coy states 
that his “ C. mornata”’ is rarely $ line in length, and that it is 
‘very common in several localities.” 
The Permian Cythere referred by one of us to C. inornata, 
M‘Coy, is decidedly not the same as this, which is the common 
dwarf variety of Leperditia Okeni, Miinster, sp. 
