14 SIDNEY F. HARMER. 



10. Lankester, E. R. ; Article 'Polyzoa'; Encycl. Britannica, 9th 



Ed, Vol. XIX, 1885, p. 440. 



11. Nitsche, H. ; Beitrage zur Kenntniss d. Bryozoen — I. Beobacli- 



tungen iiber die Entwioklungsges. ein. chilostomen Bryo- 

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



12. 0^troumoff, A.; Note sur la metamorph. du Cyphonautes; ZooL 



Anzeiger, viii. Jahrg., 1885, p. 219. 



13. Zur Entwioklungsges. d. cyclostomen Seebryozoen ; Mitt. 



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



14. Repiachoff, W. ; Ueb. d. ersten embryonalen Entwicklungsvor- 



gange bei Tendra Zostericola ; Zeits. f. wiss. ZooL, Bd. 

 XXX SuppL, 1878, p. 411. 



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



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



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

 d. zool. Stat, zu Neapel, Bd. vi, 1886, p. 499. 



EXPLANATION OF THE PLATES. 



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

 4 was more highly magnified.) 



General reference letters. 



br. brain ; 

 c.r. ciliated ring ; 

 m. mouth ; 

 m.c. mantle-cavity ; 

 nv. nerve ; 

 OPS. cesophagus ; 

 p.o. pyriform organ ; 

 B. internal sac or sucker ; 

 St. stomach. 

 .In all the figures the yolk-spheres are lightly shaded. 



