studies oil Miarine Oslraeods 



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Fig. L\ II. — v. (Cypndina) seirala (O. W. Mlllkii) var. ajfinnans n. var. — 1 Shell, Seen from tiie side, o; 53 X. 

 2. Sliell, seen from the side, ?; 43 X. 3. .\nterior part of the right valve, seen from inside, ?; 166 X. '•. Riy;hl 

 first antenna, seen from inside, the c-, f- and g-bristles are broken; (J; 173 X- 5- -^ledian eye and roil-shaped 



organ, <J: 275 X. 



