PLATE XLII. 



Fig. 1. — Megalatractus aruanus, Linn. Digestive sj'^stem. 



Fig. 2. — M. aruanus, Linn. Proboscis lying coiled in the probos 

 cis-sac. 



Fig. 3. — M. aruanus, Linn. Dentition. 



For explanation of letters, see p. 450. 



