174 



TRILOBITES OF GIRVAN. 



varieties, Ave can enumerate the following thirty-six species as peculiar to the 

 Girvan area out of a total of 110 determinable or comparable species: 



Agnostus girvanensis, 

 Trin ucle us subra diatus, 

 Ampyx drum mucJcensis, 

 hornet, 



„ macallumi, 



„ incurvus, 

 Dionide lapworthi, 



„ richardsoni, 

 Rem opleurides barrandei, 



„ (Teratorhynchns) bicortus, 



„ correctus, 



Shumardia scotica, 

 Salteria primmva, 

 Asaph us instabilis, 

 Illsenus balclatchiensis, 



„ extensus, 



„ shallochensis, 



,, macallumi, 



IUsenus memorabilis, 

 Proetus gii-vanensis, 



„ procerus, 

 Bronteus andersoni, 



„ craigensis, 

 grayi, 

 Bro nteops is ardm ilia nensis, 



„ scotica, 



Lichas (Corydocephalus~) geikiei, 

 Acidaspis callipareos, 



„ grayte, 



„ hystrix, 



„ lalage, 



Dindymene cordai, 

 Cheirurus (NieszJeowskia) unicus, 



„ (Sphperocoryphe) thomsoni, 



,, (Young ia) trispinosus, 

 Phacops (ChasmojJs) bisseti. 



If we were to include the forms which are at present too imperfectly known to 

 be specifically designated, the number would be still larger. 



British Species. — The second principal element of the Girvan trilobitic fauna 

 consists of the species occurring elsewhere in the British Isles, and it includes the 

 following- : 



Agnostus agnosti/ormis, 



Harpes flanagani, 



Trinucleus bucJclandi, 



Hem opleurides colbii, 



„ dorsospinifer, 



„ longicostatus, 



„ salteri, 



Asaph us gigas, 



Stygina latifrons, 



* 111 a ;< us semulus, 



* „ barriensis, 

 ? „ bowmani, 



? „ davisi, 



„ lotus, 

 ? „ murchisoni, 



* „ nexilis. 



IUsenus portlocki, 



* „ thomsoni, 

 *Proetus latifrons, 



* „ pseudolatifrons, 



* „ stolcesi, 



* Cyphasjns megalops, 



Ph illipsineJla parabola, 

 *Lichas anglicus, 



* ,, scuta/is, 

 * ! ,, grayi, 



„ bulbiccps, 

 „ hibernicus, 



* Acidaspis barrandei, 



* „ coronata, 



* ,, dejiexa, 



*En cr in u rus punctatus, 



„ multisegmentatus, 

 ? Cybelc verrucosa, 

 *Calymene blumenbachi, 

 „ cambrensis, 

 „ planimarginata, 

 Cheirurus bimucronatus, 

 gelasinosus, 

 „ octolobatus, 

 *Deiphon forbesi, 

 Sph a rexochus mirus, 

 Staurocephalus globiceps, 

 Phacops brongniarti, 

 *? „ downingise, 

 * „ elegans. 



(N.B. — The Silurian species are marked *.) 



Thus forty-six species (or omitting the six doubt fid ones, only forty species) 

 are common to the Scottish and other Ib'itisli areas. This is only a few 



