the Palceozoic Bivalved Entomostraca. 223 



Primitia renulina, J. Sf H. ibid. xvi. 419. Ludlow ; Abberley: Wenlock ; 



Malvern. 



Roemeriana, J. 8>- H. ibid. xvi. 422. Wenlock ; Malvern. 



rugulifera, Jones, ibid. xvi. 419. "Wenlock ; Beechey Island. 



semicircularis, J. 8,- H. ibid. xvi. 424. Wenlock ; Sweden. 



seminuluin, Jones, ibid. xvi. 418. Wenlock ; Montgomery. 



sigillata, Jones, ibid. xvi. 418. Wenlock ; Beecbey Island. 



tarda, Bar rande, MS., Tlies. Sil. 200. Stage F. f. 2 (Upper Silurian) ; 



Konieprus, Bohemia. 



tersa, J. 8f H. An. N. H. s. 3. xvi. 421. Wenlock ; Malvern. 



trigonalis, J. 8f H, ibid. xvi. 421. Wenlock; Malvern. 



umbilicata, J. 8f H. ibid. 420. Ludlow ; Malvern, Abberley. 



variolata, J. § H. ibid. 418. Woolhope ; Malvern. 



, var. paucipunctata, J. $■ H. ibid. 419. Woolhope ; Malvern. 



Lower- Silurian Primitice. 



Primitia bicornis, Jones, An. N. H. s. 3. xvi. 420. Caradoc ; Haruage, 

 Shropshire. 



bipuuctata, Salter, MS. (in the present paper). Llandeilo; Builth, 



South Wales. 



concinua. See above. 



gregaria, Barrande, MS., Thes. Sil. 200. Stage D. d. 5 (Lower Silu- 

 rian) ; Kbnigshof, Bohemia. 



Logani, Jones 1 ^ N> H g _ g xyi m Cald _ 



f var . leperditimdes, Jones feroug gandrock Canada< 



, var. remtormis, Jones ) 



Maccoyii, Salter, sp., ibid. s. 4. ii. 55. Caradoc ; Ireland, Westmore- 

 land, and Scotland. 



matutina, J. fy H. ibid. s. 3. xvi. 418. Caradoc ; Shropshire. 



nana, J. $ II. ibid. xvi. 420. Caradoc; Harnage, Shropshire. 



prunella, Barrande, MS., Thes. Sil. 200. Stage D. d. 1, 5 (Lower 



Silurian) ; Yosek, Mt. Kosow, Bohemia. 



rugosa, Jones, An. N. H. s. 4. ii. 55. Trenton ; Canada. 



Salteriana, J. $ H. ibid. s. 3. xvi. 417. Caradoc; Sholes Hook, 



Pembrokeshire, Wannamois. 



Sancti-Patricii, J. §• H. ibid. s. 4. ii. 56. Caradoc ; Ireland. 



semicordata, J. §• H. ibid. s. 3. xvi. 417. Caradoc; Sholes Hook, 



South Wales. 



simplex, Jones, ibid. 417. Caradoc ; Harnage, Shropshire : Llan- 

 deilo ; Bussaco, Portugal. 



Solvensis, Jones, ibid. s. 4. ii. 55. Lingula-flags ; Solva, South 



Wales. 



strangulata, Salter, sp., ibid. s. 3. xvi. 416. Caradoc; Lancashire, 



Wannamois. 



, var. *, Jones, ibid. xvi. 417. Caradoc ; Pembrokeshire. 



, var. crenulata, Schmidt, Untersuch. p. 196. Caradoc ; Bork- 



holm and Paggar. 



Kirkbya, Jones. 



In 1859 the genus Kirkbya was instituted for the reception 

 of some peculiar Entomostracous valves, found in Permian 

 and Carboniferous strata, which had been doubtfully and un- 

 satisfactorily referred to some cognate genera. (See Kirkby 

 and Jones " On Permian Entomostraca," Transact. Tyneside 



16* 



