38 TBILOBITA. 



HOLOCEPHALINA, Salter, 1864. 

 Holoce2)halina, Salter, 18G4, Quart. Journ. Geol. Soc. vol. xx. p. 237. 

 Distribution. Cambrian. 



Holocephalina inflata, Hicks, 1872. Menevian Group, St. David's. 



Holocephalina inflata, Hicks, 1872, Quart. Journ. Geol. Soc. vol. xxviii. 

 p. 178, pi. vi. figs. 8-10. 



Holocephalina primoidialis, Salter, 1864. Lingula-Flags, Porth-y- 



Ehaw, St. David's, S. Wales. 

 Holocephalina prinwrdialis, Salter, 1864, Quart. Journ. Geol. Soc. vol. xx. 

 p. 237, pi. xiii. fig-. 9. 



HOMALONOTUS, Konig, 1825. 



Asaphm, Brong. 1822, Crust. Foss. ; Deslongch. 1825, Trans. Soc. Linn. 



Calvados, vol. ii. p. 301. 

 Homalonotus, Konig, 182-5, Icones Sectiles ; Murch. 1837, Sil. Syst. ; Milne- 

 Edw. 1840, Crust, iii. p. 314 ; Phillips, 1841, Pal. Foss. p. 253 ; Rouault, 

 1849, Bull. Soc. Geol. France, 2'' &&x. vol. vi. p. 37; M'Coy, 1851, Pal. 

 Foss. p. 168 ; Salter, 1851, App. Pal. Foss. 

 Trimerus, Green, 1832, Mon. Tril. America. 

 Distribution. Silurian, Devojiian. 

 Subgeneric divisions : — 



1. Brongniartia, Salter, 1865. 4. Dipleura, Green, 1832. 



2. Trimerus, Green, 1832. 6. Bnrmeisteria, Salter, 1865. 



3. Kwnigia, Salter, 1865. 



Homalonotus armatus, Burm. Devonian, Cornwall and Germany. 



Homalonotm armatus, Burm. pi. iv. fig. 1 ; Salter & H. Woodw. 1865, Cat. 

 & Chart Foss. Crust, p. 15, fig. 95. 



Homalonotus bisulcatus, Salter, 1851. Arenig Group, Llandeilo Flags, 



Caradoc in "Wales and Shropshire. 



Homalonotus bisulcatus, Salter, 1851, Appendix to Sedgw. & M'Coy, Synop. 

 Brit. Pal. Foss. pi. i. G. figs. 24-31 ; M'Coy, 1851, ibid. fasc. i. p. 168 ; 

 Salter, 1859, Siluria, 2nd ed. p. 74, foss. 12. fig. 2; id. 1865, Mon. Pal. Soc. 

 pt. 2, p. 105, pi. X. figs. 2-9; id. 1866, Mem. Geol. Surv. vol. iii. Appendix, 

 pp. 264, 327, pi. xvi. figs. 1-8, p. 328, pi. xi. a. fig. 8. 



Homalonotus Brongniarti, Deslongch. 1825. Lower Silurian pebbles in 



New Red Sandstone, Eudleigh-Salterton, Devon. 



Asaphus Brongniarti, Deslongch. 1825, Trans. Soc. Linn. Calvados, vol. ii. 



p. 301, pis. xix., XX. (fig. 12 ?). 

 Homalonotus Brongniarti, Marie Rouault, 1849, Bull, de la Soc. Geol. France, 

 2''ser. vol. vi. p. 379, vol. viii. p. 370; Salter, 1864, Quart. Journ. Geol. 

 Soc. vol. XX. p. 290, pi. XX. fig. 1 ; 1865, Mon. Pal. Soc. pt. 2, p. 110, pi. x. 

 figs. 15-17, pi. xiii. fig. 9. 



Homalonotus cylindricus, Salter, 1865. Woolhope Limestone of 



Woolhope. 

 Homalonotus cylindricus, Salter, 1865, Mon. Pal. Soc. pt. 2, pi. xi, fig. 12, and 

 woodcuts figs. 27, 28, pp. 116, 117. 



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