PLATE LIX. 



FIGS. 



1-6. A new species intended to have been desci-ibed as 

 Leptocliimm griseum. 1. Colonies incrusting a 

 stein of Laminaria, from Parella Bay, Guernsey : 

 natural size. 2. A colony attached to a stone, 

 from Saint's Point, Guernsey : natural size. 3. 

 The same : x 2i. 4. Part of the same : x about 

 20. 5 and 6. Calcareous crystals from the same : 

 highly magnified. 



7. Lcptoclinum gelatinosum M. Edw. (p. 48) A colony 

 attached to a root of Laminaria: natural size (M. 

 Edwards, pi. viii, f. 1). 



8-13. Leptoclinum punctatum Forbes. (p. 49) 8. A 

 colony : natural size. 9. Part of the same : x 

 about 5. 10 and 11. Young individuals from 

 Cullercoats : magnified. 12. A single mature 

 individual with the branchial aperture expanded: 

 x about 20. 13. Apex of the same with the 

 branchial aperture contracted : similarly magni- 

 fied. 



