Messrs. Jones and Kirkby on Carboniferous Entomostraca. 43 



stales that " C arcuata " is " very common io the Carboniferous 

 shales." 



7. " Cythere bituherculata. Yellow Sandstone ; Cultra, Holy- 

 wood, CO. Down." Synops. p. 165, pi. 23. fig. 10 ; Local, p. 48 

 (" Arenaceous shale," Local, p. 100). Light-grey shaly shell- 

 grit, with Modiola (?), 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. bituherculata" common in one or two localities. 



8. '' Cythere costata. Yellow Sandstone ; Cultra, Holywood." 

 Synops. p. 165, pi. 23. fig. 11; Local, p. 48 ("Arenaceous 

 shale,'^ Local, p. 100). Light-grey solid shell-grit {Serpula, 

 &c.), with crushed valves of Leperditia subrecta in abundance; 

 but nothing visible to match the figure. We have, however, met 

 with a Kirkbya in 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 cor nuta. Yellow Sandstone; Cultra, Holy wood." 

 Synops. p. 165, pi. 23. fig. 12 ; Local, p. 48 (" Arenaceous 

 shale," Local, p. 100). Hard grey calcareous shale, with fish- 

 scales and Serpula ; or rather a Serpula-grit, much like the 

 foregoing. Leperditia Scotoburdigalensis 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. McCoy's description). It is stated to be about a 

 line long and " not common." 



10. " Cythere elongata. Yellow Sandstone; Cultra, Holywood." 

 Synops. p. 166, pi. 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). 



11. " Cythere excavata. Carboniferous Slate ; Aghnaglogh, 

 Clogher, co. Tyrone." Synops. p. 166, pi. 23. fig. 14; Local, 

 p. 48 ("Arenaceous shale," Local, p. 100). Dark-coloured, 

 shelly, fissile shale, with Anthracomyce (?) 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, pi. 23. fig. 15; Local, p. 48 



