Enter Radial without three rows ol puncta i 

 29.— Area large, occupying greater portion of dis< 1 p . 



30. — Area small, occupying only central portion ol di 



31.— A circlet 



32. — No circlet | | 



33. — [nter- Radial with three marginal bea Is. Circlet formed by 

 short lines. Rays very fine, about 40 in number. 



C. tabulates, A. S. 



34. — Inter-R without beads. Rays about 100 in numbei ; circlet 

 formed by large beads in which the Rays terminate. 



( '. adorn atus y A.. S. 



35. — Inter-Radials with one or two marginal beads 

 — Xo inter-Radial beads (39). 



— Marginal beads bifid internally at apex. C. dentatus, Deby. 

 — Marginal beads not bifid. C. \ driaticus, Grun. 



— Area circular, or nearly so (41). 



— Area elliptic, acute top and bottom (53). 



37 



33 



39 



40 



41 



42 



43 

 44 

 45 

 46 



47 

 48 



— Inter-Radials very finely striate longitudinally. 



(, '. BalticuS) ( 'leve. 

 — Inter-Radials not striate (43). 



— Rays formed of one row of dots. ( ' /aponicus i Castr. 



— Rays not punctate (55). 



— Rays from 40 to 50 (47 }. 



— Rays 24 or less in numbei | i<n. 



— Rays bearing apiculi. C. Waliichianus, Grev. 



— Rays smooth. C. Browneanus, G 



