14 SIDNEY F. HARMER. 



10. Tiiiiik(^ster, E. R. ; Article 'Polyzoa'; Eiicycl. Britamiica, 9tli 



Ed., A'ol. XIX, 1885, p. 440. 



11. Nitsclie, H. ; Beitviige zur Kenntniss d. Bryozoen — I. Beobacli- 



tungen iiber die Etitwicklixngsges. ein. cliilostomen Bryo- 

 zoen ; Zeits. f. wiss. Zool., Bd. xx, 1870, p. 1. 



12. O.-troumoff, A.; Note sur la metamorph. du Cyplionautes; Zool. 



Anzeiger, viii. Jalirg., 1885, p. 219. 



1 3. Zur Entwicklungsges. d. cyclostomen Seebryozoen ; Mitt. 



a. d. zool. Stat, zii Neapel ; Bd. vii, 1887, p. 177. 



14. Eepiachoff, W.; Ueb. d. eisten einbryonalen Entwicklungsvor- 



giinge bei Teiulra Zostericola ; Zeits. f. wiss. Zool., BJ. 

 XXX Suppl., 1878, p. 411. 



15. On the Morphology of the Polyzoa (Russian); Proc. New- 

 Russian See. Naturalists, Vol. vi, Odessa, 1880. 



1 G. Vigelius, W. J. ; Zur Ontogenie d. marinen Bryozoen ; Mitt. a. 

 d. zool. Stat, zu Neapel, Bd. vi, 188G, p. 499. 



EXPLANATION OF THE PLATES. 



(Figs. 1 — 3 were drawn with yV oil immersion of Zeiss, 1 oc. — Fig. 

 4 was more highly magnified.) 



General reference letters. 



hr. brain ; 



r.r. ciliated ring ; 



'//(. mouth ; 



m.c. mantle-cavity ; 



7iv. nerve ; 



cp.s. oesophagus ; 



jy.o. pyriform organ ; 



s. internal sac or sucker ; 



• St. stomach. 



In all the figures the yolk-spheres ai'e lightly shaded. 



