APPENDIX. 



PrelwiiiKiri/ Notes on a Collection of Trilobite Remains 

 from the Dolodrook River, N. Gippsland. 



By FREDERICK CHAPMAN, A.L.S., Ac. 



(National Museuiu.) 



Tlie following notes are based on some fragmentary fossils, 

 all trilobitic, which Mr. E. 0. Thiele, B.Sc, late of the Vic- 

 torian Geological Survey, and now on the staff of the Imperial 

 Institute, London, discovered in a bed of dark bluish iimeitone 

 associated with Upper Ordovician slates at the Dolodrook River, 

 Mt. Wellington District, N. Gippsland. Mr. Thiele has kindly 

 placed the material in my hands for description, and, although 

 the fossils are far from perfect, it seems advisable to publish, 

 the following brief notes upon them, with a view to affording 

 some information as to the age of this limestone, which comes 

 from a district of which the geology is still far from being fully 

 kno^\^^. 



The limestone in which the fossils are found is hard and sub- 

 crystalline, and the method of its fracture does not entirely 

 favour the extraction of the fossils. Moreover, the trilobites 

 themselves have become disjointed, especially in the thoracic 

 resrion, in most cases before being covered with sediment, since 

 no examples of the pleura were seen, except the merest frag- 

 ments. 



The generic forms present belong to Ai^iiosius and ?P?-flefus, 

 whilst a doubtful type, perhaps referable to Cheirunis, is repre- 

 sented by two imperfect tail-shields. 



Agnosias sp. nov. Of this f(u-ni both head and tail-shields are 

 present. It is a member of the group Longifrnntes, the distin- 

 guishing characters of the prominent glabella and the impressed 

 line separating the anterior part of the cheeks and the lateral 

 lobes of the tail behind the axis, being well marked. In general 



