Plate 109. 



Fig. 1. Ntirdod frbniti: ;ili;ict iiinl surface, p. 3S,''). 



2. Nariloa tiiiinilosd : ahactiiuil surface (»f t.vi)e, p. 3S6. 



3. PatirirUa c.rifiiKt : ahactinal surface of a speciuion from I'aiihutan Bay, 



p. 410. 



4. Sauie; actinal surface of same .speciuien, eularged. 

 G5G 



