i)!-.irrs(^Hi'; tihfsehexphditiün 1898-99- Bd.ix. J.AiEisf-;\'ni-:iMER: iTi-:i«)iM)r)i:\' 



TAF.Wii 



Taf. XVIII. 



I. Pneumodertnopsis ciliata; 2, j, 9, /o, 14., r§, 24, 25. Pneumodertna mediterrancimt; 4, 5, 13. Clionopsis grandis; 



1^, iq. Pneiimoderma violaceum; 7, 21, 23. Clione limacina; S, rr, ij, /<?, 20, 26. Halopsychc Gaudickaiidi ; iz. Thliptodon 



diaphanum ; 16, 22. Spongiobranchaea australis. 



