ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 



273 



each with an intermediate ganglionic region. There is no hint of 

 sensory or glandular function. In the adult, as in the embryo, the 





s 





^^5ii^\ 







■ m M-^ si'_^ 





^•/J 



.^^iV 



>r«' 



1^ 







'T- 



'e^' 



Section of a ventral cerebral organ in Opisthopatus cinctipes. 



C, the brain ; c, peripheral layer of fusiform cells with hyperchro- 

 matic nucleus ; g, intermediate ganglion ; n, group of young 

 nerve-cells with hyperchromatic nucleus. 



ventral organ produces nerve-cells or neuroglial cells, which are perhaps 

 contributed to the brain above. J. A. T. 



y, Arachnida. 



New Australian Pycnog-onids. — T. Thomson Flynn (Papers a?id 

 Proc. R. Sor. Tasmania, 1919, 91-100, 2 pis.). Descriptions of Pycno- 

 gonum auriUneatum sp. n. from S.E. Tasmania, somewhat closely allied 

 to P. gaini from the Antarctic, and of the very minute Ammothea 

 austral iens is sp. n. from Shark Island, New South Wales, referable to 

 the group containing A. striata and A. glarialis. Its over-all length is 



