Little-knoivn Victorian Fossils. 121 



Plate XVI I. 



Helicocrinns pluniosus^ sp. nov. From the Upper Silurian of 

 Brunswick, near Melbourne. Slightly under 

 natural size. [384J. 



Plate XVIII. 



Pig. 1. — Helicocrifius piiuiiosus, sp. nov. Calyx showing the 

 arrangement of the plates in the dorsal cup and 

 tegmen. Pinnules not shown, x 2. From a wax 

 squeeze. 



Fig. 2. — H. pli/tnosiis, sp. nov. Part of stem near distal end, 

 with live columnals. x 4. From a wax squeeze. 



Fig. 3. — H. plumosus, sp. nov. Transverse section of stem. 

 X 4. 



Fig. 4. — H. plufiiosjis, sp. nov. Coiled proximal, end of stem, 

 nearly cylindrical, and with prominent ridges. 

 Taken from a wax squeeze. x 2. [385. J 



Fig. 5. — II. plumosus, sp. nov. Anterior extremity of a 

 branch, showing the mode of attachment of the 

 pinnules to the .secundibrachs. x 2. [384.] 



Fig. 6. — Botryocri)ms longibrachiatits^ sp. nov. The stem, 

 dorsal cup, traces of the tegmen, and ventral 

 aspect of brachials. From a wax squeeze. X 2. 

 [390.] 



Fig. 7. — B. longibrachiatus, sp. nov. Section of stem, with 

 pentagonal canal. X 4. [392.] 



Fig. 8. — B. longihrachiatus., sp. nov. Two slender armlets, one 

 exposing the furrow for the axial cord. From a 

 wax squeeze. X 3. [391.] 



Fig. ^.—Rhinopterocaris titaaoyi, ¥A\\., iil., sp. An exception- 

 ally perfect specimen, showing the masticatory 

 apparatus. Left valve. X 2. [174.] 



Fig. 10. — Caryocaris angusta, sp. nov. Left valve. Natural 

 size. [195.] 



Fig. 11. — Saccocaris ietragona, sp. nov. Right valve. X 2. 

 [196.] 



3a 



