PLATE 7. 
Mnemiopsis leidyi. Agassiz Laboratory, Newport, Rhode Island, 
Fic. 40. 
Fic. 
Fic. 
Fic. 
Fic. 
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41. 
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summer of 1892. 
Young M. leidyi, 10 mm. long with developing oral lobes 
and auricles. The embryo is now in the Bolinopsis- 
stage. 
Sense-organ of the ctenophore shown in figure 4o. 
View of broad side of a mature M. leidyi. Natural size. 
View of auricular side of a mature M. leidyi. Natural size. 
Lobes not expanded. 
Half-grown M. leidyi; side view, natural size. 
View looking down upon mouth of M. leidyi. Natural size. 
Showing expanded lobes and auricles. 
Drawn from life, by the author. 
