PLATE LVII. 

 Leptoclinum maculosum M. Edw. (p. 44) 



FIG. 



1. A colony from Garth Ferry: natural size. 2. The 

 same : x about 3. 3. Calcareous granules, composed 



of crystals, from the same : considerably magnified. 4. 



Distinct crystals from the same: highly magnified. 5. 

 -A colony on a root of Laminaria: natural size (M. 

 Edwards, pi. viii, f. 2). 6. Crystals from the same: 

 variously magnified. 7.- -A variety from Parella Bay, 

 Guernsey : x 3. 8. Calcareous crystals from the same : 

 highly magnified. 



The calcareous crystals immersed in the common 

 tissue appear when slightly magnified to be spherical 

 concretions, but when highly magnified are seen to 

 be pyramidal star-shaped crystals with smaller ones 

 superposed. 



