178 



TRILOBITES OF GIRVAN. 



their temporary invasion or desertion of the basin of deposition may be gathered 

 from an inspection of the following table. 













3 











^-^-S 



Genera. 



J-gg. 





i 



Btf 



A 

 o ft 



1 



A p\ 





a 



1 (i 



2 aw 



. 2 p 







3 s 





a * 



bl 3 







':'■ 5 



~1:'I 





.S S g 





A, o 



t 2 



Acts 



? 2 

 Sc5 



s o 





g o 







m3o 



m6 



£6 



c«6 



c3 £ 

 QC5 



(56 



me 



3 bLVJ 



Agnostus 





x 



X X 



x 













Harpes . . . . 



X X 



X 



X 









X 









Trinucleus . 



X 



X X 



X X X X X X 



x 















Ampyx . . . . 



X 



X X X X 



X X 



X 















Dionide 







X X 



x 















Triarthrus . 





X 



















Apatokephalus 





X 



















Remopleurides 



x 



X X X X X 





X X 















— (Teratorhynchus) . 





X 



















Shumardia . 







X 

















Salteria 





X 



















Telephus 







X 

















Asaphus 



X 



y x 



















Stygina 







X 

















Cyclnpyge 







XXX 

















Bohemilla 







X 

















Illxnus. 



X X X X X X 



XXX 



X 



XXX 



XXX 



X X X X 



XXX 



X X X X 







Proetus. 









X X 



X X X X 



XXX 



X X 



X 







Cyphaspis 









x 



X 













Arethusina . 





X 



















PhiUipsinella 









X 















Menocephalus (Tornqui- 























stia) . 





x 



















Bronteus 



X X X X 











X 



X 



X 







Bronteopsis . 



X 



X X 



















Lichas{ Corydocephalus 





X 





X 



X 



X 









X 



— (Platylichas) . 





X 





X 



X 



X 



X 









— (Metopolichas) 









X 





X 











— (Amphilichas) 



X 



X X 



















— (Conolichas) . 









X 















Lichapyge ? . 







X 

















Acidaspis 





XXX 



X 





XXX 



X X 



X 



X 







Encrinurus . 



X 



X 



X 



X 



X 



X 



x 



X 



X 



X 



Cybele . 



X X 



X X X X 





X 















Dindymene . 





X ? 



X 



X 















Calymene 



x 



XXX 





X 



X 



X 





X 







Cheirurus 



X 



X 





X 





X 



X 









— (Cyrtometopus) 









X 















— (Nieszkowskia) 





X 



















— (Sphxrocoryphe) 





X 



X 



X 















— (Youngia) 

















X 







Deiphon 











X 













Sphsereeochus 



x 



X 



















Staurocephalus 





X ? 





X 















Pliomera 



X 





















Phacops (Pterygometo 























pus) . 



X 



X 





X 















— (Phacopidella) 











X 



X X 



X 



X 





X 



— (Chasmops) 









x 















In the Stinchar Limestone Group we notice 16 genera and sub-genera present, 

 containing 26 species. The genera Illxnus and Bronteus comprise more than one 

 third of the number of species, and Illxnus appears also to be the richest in 

 individuals. 



In the Balclatchie Group 26 or possibly 28 genera occur with 46 (or 48) 

 species. Remopleurides, Acidaspis, and Ampyx take the lead. 



In the Wliiteliouse Group there are 16 genera recorded and 26 species (or 



