Ee M.B.C: MEMOIRS. 
Now XX. 
POOH ALT LARVAE OF PORT ERIN. 
BY 
KF. HH. GRAVELY, MSc., 
Junior Demonstrator of Zoology in the Victoria University of Manchester. 
i gy yo 
INTRODUCTION. 
Previous Work upon PotycHart LARVAE OF THE 
L.M.B.C. District. 
There appear to be only two papers which touch 
upon this subject. Mr. Chadwick (1899) has recorded 
the tubicolous post-larval stage of Pectinarza and also 
the larvae of several other Polychaets; some of the latter 
are figured, but none identified. Mr. Hornell’s account 
of the L.M.B.C. Polychaeta (1891) includes a “ Note on 
the Embryology of Avrenzcola and Scoloplos.” It would 
appear, however, from the foot-note to p. 314 of Vol. II. 
of the Cambridge Natural History that the egg-capsules 
and larvae here referred to as those of Arenzcola are now 
known to belong to a Phyllodocid—Phyllodoce maculata 
according to Hornell himself; Hulalza viridis according 
to some others. Hornell’s oases of these larvae strongly 
suggest that the tuft of apical cilia that he describes 
represents in reality the “hook” of cilia characteristic 
of Phyllodocid larvae; and they closely resemble 
MelIntosh’s figures of the larvae of ae maculata 
. (McIntosh: 1869). 
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