312 Proceedings of the Royal Society of Victoria. 



Family Cypridinidae. 



Genus Cyprosina, Jones. 



Cypmsina, sp. (PL XVI., Fig. 4; PI. XVII., Fig. 1). 



Observations. — Tliis somewhat fragmentary specimen seems 

 to agree most nearly with the genus Cyprosina, and is ap- 

 parently a left valve. It differs from C. whidbornei^ of the 

 Devonian of England in having more compressed ends and a 

 gi'eater breadth at the posterior extremity. This specimen was 

 collected by the Rev. A. W. Cresswell, M.A. 



Locality and Horizon. — Cave Hill, Lilydale. Silurian (Yerin- 

 gian). 



Phyllocarida. 



Family Ceratiocaridae. 

 Genus Ceratiocaris, McCoy. 



Ceratiocapis pritchardi, sp. nov. (PI. XVII., Figs. 2, 2a). 



Description. — Carapace pyriform, deep behind, narrower in 

 front and rather acute ; back gently curved ; ventral margin 

 forming a bold curve and meeting the posterior margin at a 

 sharp angle, whilst it curves more gently towards the anterior 

 region, where it is somewhat concave. Abdominal margin 

 deejoly concave. Surface gently rounded near the back and 

 anteriorly, more tumid along the ventral side and terminating 

 in a narrow and conspicuous flange. From about the middle 

 of the carapace to the flattened ventral margin the surface is 

 relieved by elongate tubercular ridges and incised striae run- 

 ning generally parallel with the ventral border. 



Segments and telson not known. 



Dimensions of Carapace. — Greatest length, 23 mm. ; greatest 

 width, 14 mm. 



Observations. — The carapace of C. pritchardi is quite distinct, 

 m its general shape, from any known species of Ceratiocaris, 

 the nearest approach to it being shown in C. halliana, Jones 



1 Geol. Mag-. Dec. ii., vol. viii., p. 3.38, pi. ix., fiy:s. 1-3, 5. 

 Ann. Nat. Hist., ser. 7, vol. i., 18i)S, p. 340, pi. xvii., fig. 8. 



