112 On Polyzoa from Iceland and Labrador. 



13. Cellepora ovata^ Smitt. 



The specimens of this form from Labrador and Iceland are 

 identical in character. 



Cyclostomata. 



14. Crisia eburnea^ Linn. 

 [Mediterranean; Madeira; Australia.] 



15. TuhuUpora flabellaris^ Johnst. 



16. Discoporella verrucaria^ Fabr. 



Of the foregoing species eight, or half the number, are not 

 included in Packard's list of the Polyzoa of South Labrador. 

 Fourteen are common to the American coast and the Arctic 

 seas. Ten are British. Two are Mediterranean forms, both 

 of them having a very wide range, 



EXPLANATION OF THE PLATES. 



Plate X. 



Fig. 1. Lepralia x>orifera, Smitt. 



Fig. 2. The same, showing- the ovicell. 



Fig. 3. Lepralia reticulato-jmnctata, Hincks. 



Fig. 4. The same, more highly magnified. 



Fig. 5. Lepralia propinqua, Smitt. 



Fig. G. The same, more highly mag-nified. 



Fig. 7. Large avicularium of Lepralia propinqua. 



Fig. 8. Ditto of Eschara Landsborovii, Johnston. 



Figs. 9-14. Lepralia radiatula, Hincks. 



Plate XL 



Fig. 1. Lepralia trispinosa, Johnston, var. 



Fig. 2. Lepralia (Discopora) shicera, Smitt. 



Fig. 3. Celleqmra plicafa, Smitt. 



Fig. 4. The same. 



Fig. 5. Cellepora ovata, Smitt. 



Fig. 6. Cellep)ora bilaminata, a, Hincks. 



Fig. 7. The same, h. 



Fig. 8. Lepralia tubulosa, Norman. 



Fig. 9. Hetejjora Wallichiana, Busk, MS. 



Fig. 10. The same ; a portion of the dorsal surface. 



Fig. 11. The same, a fragment of about the natural size, showing the 



shape of the fenestrae. 

 Fig. 12. The same, a single cell and ovicell. 

 Fig. 13. The same,.,avicularium in profile, showing the strongly developed 



beak. 



