Messrs. Jones and Kirkby on Carboniferous Entomostraca. 43 
states that “ C. arcuata” is “ very common in the Carboniferous 
shales.” 
7. “ Cythere bituberculata. Yellow Sandstone ; Cultra, Holy- 
wood, co. Down.” Synops. p. 165, pl. 23. fig. 10; Local. p. 48 
(‘ Arenaceous shale,” Local. p. 100). Light-grey shaly shell- 
grit, with Modiole (?), slightly micaceous. Leperditia subrecta 
abundant, and smaller obscure Entomostraca present, but no- 
thing like the figure. A very similar, if not identical Beyrichia, 
however, occurs in Scotland (in the Coal-measures near Glasgow), 
and will bear the name B. bituberculata, M‘Coy. Prof. M‘Coy 
found his “ C. bituberculata”? common in one or two localities. 
8. “ Cythere costata. Yellow Sandstone ; Cultra, Holywood.” 
Synops. p. 165, pl. 23. fig. 11; Local. p. 48 (‘“ Arenaceous 
shale,” Local. p. 100). Light-grey solid shell-grit (Serpule, 
&c.), with crushed valves of Leperditia subrecta in abundance ; 
but nothing visible to match the figure. We have, however, met 
with a Kirkbyain the Carboniferous Limestone of the south-west 
of England somewhat like fig. 11. Prof. M‘Coy refers to “ C. 
costata”’ as being about + line in length, rare, and solitary. 
9. “ Cythere cornuta. Yellow Sandstone ; Cultra, Holywood.” 
Synops. p. 165, pl. 23. fig. 12; Local. p. 48 (‘ Arenaceous 
shale,” Local. p. 100). Hard grey calcareous shale, with fish- 
scales and Serpule; or rather a Serpula-grit, much like the 
foregoing. Leperditia Scotuburdigalensis and Kirkbya annectens 
are present, but not the figured specimen. This we believe to 
have been L. subrecta with an extraneous morsel of matrix 
attached near the middle of the hinge-line (taken for the ventral 
border in Prof. M‘Coy’s description). It is stated to be about a 
line long and “ not common.” 
10. “Cythere elongata. Yellow Sandstone; Cultra, Holywood.” 
Synops. p. 166, pl. 23. fig. 15; Local. p. 48 (“ Arenaceous 
shale,” Local. p. 100). Grey Serpula-grit, with Modiola (?). 
There is no specimen like the figure (which appears to be an 
oculate L. subrecta, with its dorsal region buried in the matrix) 
now visible on the slab; but there are L. Scotoburdigalensis, 
Kirkbya annectens, two Cytheres, and a Leperditia (?) like fig. 8, 
** Cythere amygdalina.” M‘Coy’s “ C. elongata” is stated to be 
half a line long and “very common in the shales of certain 
localities ” (p. 166). 
ll. “ Cythere excavata. Carboniferous Slate ; Aghnaglogh, 
Clogher, co. Tyrone.” Synops. p. 166, pl. 23. fig. 14; Local. 
p- 48 (“ Arenaceous shale,” Local. p. 100). Wark-coloured, 
. Shelly, fissile shale, with Anthracomye (?) and obscure casts of 
Leperditia subrecta; and the figure seems to have been based on 
some such specimen. 
12. “ Cythere Hibbertii. Yellow Sandstone; Larganmore, 
Bangor, co. Mayo.” Synops. p. 166, pl. 23. fig. 15; Local. p. 48: 
