258 
H. L. jr. riXELL. 
of R large specimen just below the lopliopliore is rather less 
than 1 mm., while the ampulla measures 1’2 mm. iu diameter. 
The animals are colourless and transparent except for a 
g’reater or smaller number of irregularly arranged opaque 
white spots. These spots are quite conspicuous in the living 
Text-fig. 1. 
Part of a colony of Phoronis vancou verensis from a photo- 
graph. ( X 2.) 
animals, and are caused by masses of minute granules on 
the surface of the epidermis, occuiring chietly on the 
tentacles and distal region of the bod}'. They can be 
scraped off the surface of the animal, and in cutting- sections 
the granules become liberated, and obscure to a considerable 
extent the cell details in the animals, in Avhich they are 
numerous. The masses are white and opaque when viewed 
with reflected light, but the individual granules are more or 
less transparent and refringent with transmitted light. The 
