BY R. ETHERIDGE, .TU??R., AND JOHN MITCHELL. 499 



Genus Bronteus Goldfuss, 1839. 



(Nova Acta Phys. Med. Acad. Csesareye Carol. Nat. Curios., 



xix., Pt.l, 1839, p.360). 



History. — The tirst recognition of Bronteus in Australia was 

 another of Mr. Salter's determinations.* Nothing further seeins 

 to liave eventuated until De Koninck investigated the Clarke 

 Collection. He described a new form as B. goniopdtis, and 

 referred a second to B. partschi Barr., from " Boree Cavern."' 

 Jenkins reported the discovery of a large individual in his 

 Hume beds in 1878. and subsequently described and figured it 

 in the same year. He did not apply a name, but the figures are 

 good, and, with the assistance of specimens, enabled us to de- 

 scribe it in 1890 as B. jenkinsi. In the meantime, J. Mitchell 

 had described a small Bowning form as B. longispinifex.\ In 

 1890, the description of a very large but ill-preserved pygidium 

 by R. Etheridge appeared,! found by Mr. G. Sweet at Delatite, 

 Victoria; this was named Ba']) enormis. A record of two species 

 from the Lilydale Limestone by Mr. F. Chapman, one allied to 

 B. oblongus Barr., and the other to B.formosus Barr.,§ described 

 in 1915^ under the name of Goldius greeiiii and G. cresswelli 

 from Ruddock's Quarry, near Lilydale, and Cooper's Creek, 

 Victoria, respectively, || concludes the history of Bronteus in 

 Australia. 



Corda divided this family into three sections.^ The reasons 

 advanced for these divisions have been considered by us, and we 

 have elected to follow the example of Barrande, and reject them. 

 We are, however, inclined to the opinion that Brontei might be 

 divided into sections, with some advantage to Science, but it is 

 questionable whether slight pygidial variations alone are suffi- 

 cient grounds on which to form subgenera. 



* Clarke, .Southern Gold Fields N. S. Wales, 1860, p. 286. 

 t For etymological reasons, we suggest a slight alteration in the specific 

 name of this well-marked Bronteus, viz., B. /oii!/ispinosii'<. 



: Etheridge, Proc. Roy. Soc. Vict., v. (N.S.), 1893, p. 189, PI. xi. 

 >; Chapman, Report Austr. Assoc. Adv. 8ci., xiv., 1913, p. 228. 

 II Chapman, Proc. Roy. 8oc. Vict., xxviii. (N.S. ), 1915, pp. 159 and 160, 

 PL xiv., figs. 1, 2, 3, and Plate xvi., fig. 17. 



*f Corda, Prod. Mon. Bohmischen Trilobiten, 1847, pp.57, 58. 



