Victorian Fossils, Part X. 107 



apex curved. Central fold stronger than in the median or tri- 

 angular plates. In the median area of each lateral half, u 

 minor and broader fold occurs. Imbricating lamellae closely- 

 set, sinuous, and somewhat unequally spaced at different parts 

 of the same plate ; this, however, may be due to a slight dis- 

 tortion of the surface. The lamellae crossing the plates nearly 

 at right angles and when within the last third towards the 

 margin, turn up sharply towards the apex. 



Dimensions. — Length of entire group, 9.5 mm.; breadth, 

 7 mm. Length of a lateral plate, 7 mm. ; breadth at base, cir. 

 3 mm. Length of median plate, cir. 3.66 mm. ; breadth at base, 

 cir. 2.33 mm. 



Occurrence. — Silurian (Yeringian) ; coll. by Geol. Surv. Vict., 

 B16, about IJ miles below Simmons' Bridge Hut on the Yarra 

 (Upper Yarra Distr.). At another Yeringian locality, B23, 

 G.S.V., at the junction of the Woori Yallock and Yarra, some 

 separate plates of a Turrilepas occur. They are not very 

 well preserved, but show a strong median fold like that in the 

 above species. 



Remarks. — This form differs from Etheridge's T. mitchelli^ in 

 the greater proportionate length of the plate, in the exceptional 

 width of the median fold seen on the exterior of the plate, and 

 in the sharply upturned outer edges of the lamellae. In out- 

 line, our species bears a marked resemblance to T. scotica, Eth. 

 fil.,2 but the plates in that species are wider at the base, and 

 more extended and pointed at the apex. 



Order — Phyllocarida (Pod-shrimps). 



Genus — Ceratiocaris, McCoy. 



Cepatiocapis pinguls, sp. nov. 



(PI. XXVIIL Figs. 3-5). 



Description of Holotype. — Carapace subovate, sides very 

 tumid. Anterior margin straight, sloping downwards and back- 



1 Op. supra cit. , p. 338. 



2 Mon. Sil. Foss. Giivaii, 1S80, pi. xiv. fi-. 



