NOTE ON THE EARLY LARVAE OF NEPHTHYS AND GLYCERA. 



169 



Fig. 8. — Larva of Glycera. 3 days. 

 From the ventral aspect, ap. c. — Apical cilia, gr. p. — Green pigment. 



more numerous on the lower hemisphere, and especially below the 

 trochal ring. The apical cilia have assumed the form of a ring round 

 the upper hemisphere. This band is situated in a slight depression of 

 the surface and is incomplete dorsally (Fig. 9). There is a patch 



Fig. 9. — Larva of Glycera. 4 days. 

 From the dorsal aspect, an. — Anus. g. — gut. 



of cilia extending from the lower lip to the anus (Fig. 10). The mouth 

 is diamond shaped and is situated mid-ventrally on the lower 

 hemisphere. The gut is large and sac-like, without any definite 

 division into stomach and intestine. 



NEW SERIES.— VOL. IX. NO. 2. OCTOBEI;, 1911. 



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