Plate IV. 



20. — Campylodiscus tabulatus^ A § 



53, ( ', JaponicuSi ( 'as:' 

 ,, 26. — C. radiosuSy Ehr. 

 ,, 3<Dtf. — C. iatus, Shadb. 



^3. — C. obsolttus, Cleve. 



Fig. 20 is from A. S., Atlas, x OOo. 

 „ 23 is from Castracane, x 440. 

 ,, 26 is from Ehrenberg, x 300. 

 ,, 30^ is from Shadbold, x 400. 

 „ t,^ is from Cleve, * 280. 



