454 



MR. C. F. JENKIN ON 



[May 12, 



oscule I mm. diameter flush with the surface ; there is no collar 

 or fringe. 



The spicules agree very well with Haeckel's description of 

 Leucaltis floridiana. The apical rays of the large quadriradiates. 

 in the dermis point inwards, the species must therefore be placed 

 in the genus Leucilla. The small quadriradiates line the excurrent 

 canals, with their apical rays projecting into them. 



Leucilla wasinensis, sp. n. (Text-fig. 104.) 



One specimen of this new species was dredged in 6-8 fathoms 

 atWasin. It is ovoid in form, 16 mm. long x 7 mm. diameter, 

 with a fringed oscule, 2 mm. in diameter. It is white, as pre- 

 served in spirit. The body-walls are about 2 mm. thick, leaving 

 a gastral cavity 3 mm. diameter in the centre. Externally it is 

 rough with the stumps of large projecting oxea. The oscule is 

 protected by a dense fringe of thin oxea, surrounded by a few 

 thick ones like those projecting from the dermis. 



Text-fig. 104 A. 



Leticilla wasinensis, spicules. X 40. 

 (For explanation of the letters see text p. 455.) 



Canal-system. — There are large subdermal chambers from which 

 branch the incurrent canals. The excurrent canals are also 

 branched. The canal-system is similar to that most usual in the 

 genus Lencandra. 



