300 F. Chapman: Victorian Fossils, Part XIV. 



Explanation of Plates. 



Plate LXI. 



Fig. 1. — Ampyx parvulus, Forbes, var. jikaensis, var. nov. 

 Holotype. Silurian (Melbournian). Moonee Ponds 

 Creek, Yict. x 2. Coll. and pres. by J. S. Green. 



Fig. 2. — A. parvulus, Forbes, var. jihaensis, var, nov. Paratype, 

 Cephalon with proximal part of frontal spine, 

 Silurian (melbournian). Moone© Ponds Creek, x 2. 

 (Spry coll.). 



Fig. 3. — A. yarraensis, sp. nov. Holotype. Silurian (mel- 

 bournian). South Yarra. x 2. Coll. F. P. Spry. 



Fig. 4. — lUaenus jutsoni, sp. nov. Holotype. Silurian (mel- 

 bournian). Near Heidelberg, Yict. Coll. and pres. 

 by J. T. Jutson. Nat. size. 



Fig. 5. — /. jutsoni, sp. nov. Profile of carajDace of foregoing 

 specimen. Nat. size. 



Plate LXH. 



Fig. 1. — Encrinurus sjjryi, sp. nov. Holotype. Silurian (mel- 

 bournian). South Yarra. Coll. and pres. by F. P. 

 Spry. Slightly larger than nat. size. 



Fig. 2. — Homalonotus vomer, sp. nov. Cephalon of holotype, 

 Silurian. Wandong, Yict. Slightly larger than nat. 

 size. 



Fig. 3. — H. vomer, sp. nov. Holotype. Silurian. Wandong,, 

 Yict. Coll. and pres. by J. T. Jutson. Nat. size 



Plate LXHI. 



Fig. 1. — Homalonotus vomer, sp. nov. Plesiotype. Head of 



immature specimen. Silurian. Wandong, Yict. 



Coll. and pres. by F. P. Spry. Slightly larger than 



nat. size. 

 Fig. 2. — H. vomer, sp. nov. Paratype. Thorax and pygidium. 



Silurian. Wandong, Yict. Coll. and pres. by G.. 



Sweet, F.G.S. Slightly less than nat. size. 



