Baily — On a Neiv Species of Pentremite, 8fc. 33 



EXPLANATION OF PLATE I. 



Fig- 1- — Orophocrinus (Pentremites) prcelongus, Baily. Lateral view, 

 natural size, from carboniferous limestone, 

 St. Doolagh's, Dublin. 



,, 1a. — Do. do. Section of ditto. 



,, 2. — Do. do. Natural size, carboniferous limestone, Baheny, 

 Dublin. 



,, 2a. — Do. do. Natural size, view of the summit. 



,, 2b. — Do. do. Portion of ambulacral area enlarged three dia- 

 meters. 



,, 3. — Cadaster trilobatus, M'Coy. Lateral view, natural size. 



>> 4. —Do. do. var. acutus, M'Coy. Lateral view, natural size. 



,, 4a. — Do. do. do. Ventral surface of same, showing pen- 



tagonal mouth and ovate anal aper- 

 ture, natural size. 



,, 4b. — Do. do. do. One of the ambulacral areas of same, 



showing perforated plates, and in- 

 termediate jointed ridges, enlarged 

 four diameters. 



,, 5. — Do. do. do. Small ovate specimen, natural size. 



,, 5a. — Do. do. do. Basal view of same, natural size, show- 



ing convex central disk perforated 

 for attachment of stem. 



Figs. 3, 4, and 5 from specimens obtained in shales of lower carboni- 

 ferous limestone, Lisdowney, near = Ballyragget, county Kil- 

 kenny. 



SCIEN. PROC. VOL. V. FT. I. 



