LlUle-knoivn Victorian Fossils. 113- 



Yarra Rivers. Collected by the Geo). Surv. Vict. B. 23f. 

 [444]. Silurian. 



Order PHYLLOC ARIDA, Packard. 



Sub-Order Ceratiocarina. 



Family Caryocaridce, nov. 



Genus Caryocarh, Salter, 1863. 



Caryocarls angusta, sp. nov. (PL XVIir., Fig. 10). 



Description. — Carapace bivalved, narrow, oblong, widest at the- 

 postero-ventral region; dorsal border straight, ventral gently 

 convex, and well-rounded posteriorly^: usually three and a-half 

 times as long as high, but variable in its proportionate length;, 

 smooth, with a faint creasing or folding parallel with the ventral 

 margin. Length of figured specimen, 25 mm.; height, 7 mm. 



Observation. — C. angusta approaches some varieties of 0. 

 wrightii, Salter,"- from the Skiddaw Slates, especially those with 

 narrow valves, but it difi'ers from them in the less sharply trun- 

 cate extremities. C. oblongus, Gurley,'^ from the calciferous 

 shales of Canada, also closely approaches the Victorian speci- 

 mens, but is not quite so long in proportion to its height. The 

 above form was referred by Gurley to the graptolities. 



Localities and Horizon. — Collected by the Geological Survey of 

 Victoria, Ba 90 [193-4] and Ba 92 [195] near Guildford; also 

 from the Parish of Coole Bai'ghurk, W.L.S.2. From Castlemaine,. 

 associated with Didymograptus caduceiis (T. S. Hall collection). 

 Lower Ordovician. 



Genus Saccocaris, Salter, 1868. 

 Saccocaris tetragona, sp. nov. (PI. XVIIl., Fig. 11). 

 Description. — Valves sub-rectangular, oblong,. Length, a little 



1 Bj' the evidence of the position of the caudal appendages derived from the type of 

 the genus lihinnjjferocaris presently to be described, it seems necessary to reverse the 

 relative position of the valves from that in which it was regarded by Salter, Jones, and 

 Woodward for this particular group, and to take the narrow end as the anterior. By this 

 reading also the valves correspond in position with Hi/inciiocaris, which was, however, not 

 so distinctly bivalved. 



2 C. iwigTirir, Salter, Jones, and Woodward, 1892, Mon. Brit. Pal. Phyllopoda (Pal. 

 Soc), p. 89, pi. xiv., figs. 11-15. 



3 Journal of Geology, vol. iv., No. 1, 1896, p. 87, pi. iv., fig. 2. 



