150 PROCEEDINGS OF THE ACADEMY OF [1884. 



EXPLANATION OF PLATES. 

 Plate II. 



1. Spirophpton archimedes (n. sp.) 



Two -whorls of a large specimen, natural size, 

 1 a. Lower side of a pait of a smaller fiond, showing more plainly the 

 suhspiral undulat'ons. 



2. Stictopora obliqua (n. sp.) 



Natuial size. 

 3 a. A small portion of it enlarged, showing the oblique downward curve 

 of the transverse rows ; three diameters. 



Plate IIL 



1. Triacrinus pyriformis (n. gen. et sp.) ; natural size. 



a. Poster or side ; enlarged three diameters. 

 h. Anterior side ; enlarged thiee diameters. 



c. Basal view ; enlarged three diameters. 



d. Upper side ; enlarged three diameters. 



e. Diagram of plates. 



2. Triacrinus globosus (n. sp.) 



The lettering of the figures same as last. 



3. Fungispongia irregularis (n. gen. et sp.) 



a. Section ; enlarged three diameters. 



4. Stictopora graminifolia (n. sp. ) 



a. Portion ; enlarged three diameters. 



5. Eucalyptocrinus inconspectus (n. sp.) 



6. Cornulites contractus (n. sp.) 



a. A group of three individuals growing together. 

 6. Surface of 6 ; enlarged three diameters. 



7. Cornulites nodosus (n. sp.) 



a. Same individual ; enlarged three diameters. 



8. lAngula hicarinata (n. sp. ) 



Interior of valve. 



