EXPERIMENTAL HYBRIDISATION. 
335 
the ventral surface, p. ped} Knob-like outgrowth probable rudiment 
of postei'ioi’ j^edicellaria.. 
Figs. 5-6. --Hybrid plutei of E. esculentus ? X E. iniliaris (^, 
viewed, the first from the ventral, the second from the right side. 
Figs. 7-8. — Hybrid plutei of E. miliaris $ X E. acutus (^ , 
viewed, the first from the ventral, the second from the right side. 
Figs. 9-10. — Hybrid plutei of E. acutus $ X E. miliaris J', 
viewed, the first from the venti-al, the second from the right side. 
