PLATE XCIV. 



Fig. 



1. Posterior end of Stylarioides flabellata, Sars, from Norway. Enlarged. 



2. Young Arenicola marina, L., about half an inch in length. gl. oesophageal glands. 



X about 40 diam. 



3. Cephalic region and barred tentacle of a young Spionid with a simple conical snout, 



from St. Andrews, 1863. X about 40 diam. 



4. Early egg of Nerine cirratulus, Delle Chiaje. x 80 diam. 



5. More advanced egg, February 16th, 1891. X 60 diam. 



6. Larva of the foregoing, February 26th, 1889. X 116 diam. 



7. Egg of Nerine ?, March 4th, 1892. X 116 diam. 



8. Spionid larva, from tow-net July 6th, 1890, viewed from the under surface. St. 



Andrews. Magni/ied. 

 10. Older stage, probably of Sabellarian, St. Andrews, oJuly 19th, 1888. Magnified. 

 11 and 4iU£ Somewhat oblique view of young Sabellarians, the former with developing 



palpi and tentacles, for comparison with Spionids. July 18th, 1888. St. Andrews. 



Magnified. 



12. Larva of Nerine cirratulus ?. St. Andrews, February 24th, 1891. The centre is 



opaque. Magnified. 



13. Ovum of Scolecolepis vulgaris* Johnston. May 11th, 1898, St. Andrews. X oc. 2, 



obj. D. 



14. Early larva of Spionid (pelagic). St. Andrews. Magnified. 



15. Young PdBcilochmtus of thirty segments. St. Andrews, October 27th, 1888. 



According to Claparede, six short feet occur in front, not seven. x ocC 3, obj. A. 

 Drawn by Mr. Pentland Smith, M.A., B.Sc. 

 15a. Young form of the same or an allied species? July, 1893. Drawn by Rev. J. M. 

 Anderson, M.A., B.Sc. x similarly. 



16. Young Spionid {Spiophanes ?) . July 25th, 1888, St. Andrews. Drawn by Mr. 



Pentland Smith, M.A., B.Sc. Magnified. 



17. Young Magelona papillieornis, F. Miiller. St. Andrews, May 25th, 1900. Magnified. 



18. Twentieth foot of Cirratulus Ghiajii, Mel. . X 360. 



