82 POTERIOCBINID.a;— POTEKIOCEmuS. 



8. Species. Poteriocrinus conicus. (Phillips.) 

 PI. \0,fig. 3rt, 3 6,3 c. 



Definition. — Body conical, approaching in form to the P. rostratus, but the plates 

 are rather more tumid, and the first series are not quite so much elongated ; the articu- 

 lations for the rays extend across the whole width of the plates. Nothing is known of 

 the number and structure of its rays. 



Synonymes and References. 



Poteriocrinus conicus. — Phill. Geol. York. 2. t, ^.fig. 3. 

 Port. Geol. Rep. t. 16./. 12. 

 L. de Kon. Des. des. anim.foss. PI. F.f. 3. p. 47. 

 Mil. Edw. ap. Lamk. p. 664. 



Formation and Localities. 



Mountain Limestone. — BoUand, Yorkshire ; Black Rock, Avon Side, Bristol ; Ireland 

 and Tournay. 



The P. Conicus was first discovered in the mountain hraestone of Yorkshire, by Mr. 

 Gilbertson, since which we have obtained a well preserved specimen from the Black 

 Rock, Bristol; but unfortunately the specimens obtained from both localities have 

 neither the rays or column attached. 



9. Species. Poteriocrinus latifrons. (Austin.) 

 PL 10. fig. 4. 



Definition. — Body conical; rays articulating by the whole breadth of the ray bearing 

 plates; primary rays five, secondary ten, final subdivisions twenty ; column slender. 



