116 Proceedings of the Royal Society of Victoria. 



•tuted by Etlieridge, for Salter's name had already been attached 

 "to a species of Lingulocaris — L. salteriana. 



R. R. Gurley has found certain fossil remains in the calciferous 

 series of Summit, Nevada, and Point Levis, Canada, which may 

 be referred to the above genus. They are associated in the 

 North American strata, as in the Victorian, with graptolites 

 of the Lower Ordovician types, and Gurley interprets their 

 •structure as representing the polypaiy of a graptolite, with "the 

 proximal portion possibly thecaphorous." There appears to be no 

 ■direct evidence, however, which points to that conclusion, and, 

 moreover, the characters of Caryocaris, to which genus Gurley 

 crefers them, have been well defined by Messrs. Salter, Jones, and 

 Woodward as a genus of bivalved Crustacea of the phyllocarid 

 group. 



During my examination of an extensive series of phyllocarid 

 ■remains in the collection of the National Museum, and in private 

 collections, I was struck with the different appearances shown by 

 the carapaces of these fossils when preserved in a crumpled rock, 

 ;and when found in a fine-textured shale. For the better preser- 

 vation of the carapace we naturally turn to specimens preserved 

 in a fine-grained rock, or one which has been subjected to a 

 minimum of deformation. In the fine-textured shales from the 

 north of Lancefield the carapaces are found to be practically 

 smooth in the central area, excepting where roughened second- 

 arily by chemical action between the folia of the rock. The 

 dorsal and ventral borders of the valves are deeply sulcate or 

 folded and traversed obliquely by shorter folds, or sometimes by 

 fine, long, hair-like grooves. In those examples which are found 

 in the crumpled slates or phyllites the valve has been corres- 

 pondingly crumpled and distorted, often, however, in a most 

 .regular manner, and at first suggestive of a primary wrinkling in 

 the carapace itself. 



The generic differences which separate this form from other 

 previously described genera of the Phyllocarida is made apparent 

 by the discovery of the exceptionally perfect specimen now 

 figured, and which was collected by the Geological Survey of 

 Victoria at the camp north of Lancefield Ba 27 [174]. This 

 specimen, which is in the collection at the National Museum, shows 

 that the animal possessed a short stylet, like that suggested by Salter 



