220 



RADULA OF THE RACHIGLOSSA 



CHAP. 



(6) The Rachiglossa comprise the 12 families Olividae, Harpi- 

 dae, Marginellidae, Volutidae, Mitridae, Fasciolariidae, Turbi- 

 nellidae, Buccinidae, Nassidae, Columbellidae, Muricidae, and 



Fig. 117. — Portion of the radula of Melongena 

 vespertilio Lam., Ceylon, x 30. 



Fig. 116. — a tooth 

 from the radula 

 of Conus imperi- 

 alis L., S. Pacific, 

 X 50, showing 

 barb and poison 

 duct. 



Fig. 118. — Portion of the radula of Eburnajaponica 

 Sowb., China, x 30. 



Fig. 119. — Portion of the 

 radula of Murex regius 

 Lam., Panama, x GO. 



im- II 



Coralliophilidae. Certainly most and probably all of these fam- 

 ilies are or have been carnivorous, the Coralliophilidae being a 

 degraded group which have become parasitic on corals, and 

 have lost their teeth in consequence. The characteristics of 



'1 



