1032 ON THE PLANKTON OF THE FAEROE CHANNEL. [Dec. 13. 



It is the ooly Trachynema which approaches T. funer curium Hkl. 

 in size ; but its proportions, and the position of the generative 

 organs, are against its being a young form of this species. In 

 most recognizable points it lies between T. octonarium Hkl. and 

 T. eurygaster Hkl. ; but it agrees exactly with neither. The eight 

 radial canals and manubrium were of a strong brick-red. 



It occurred in deep or doubtful hauls only. 



EXPLANATION OF PLATE LXVI. 



Fig. 1. Siphonospkeera tizardi, sp. n., p. 1025. A single individual is repre- 

 sented by half the shell and by half a section of the central capsule : 

 outside the latter are zooxaiithellse. Cam. Inc. 



Fig. 2. Aulographis moorensis, sp. n., p. 1026. Termination of a radial tube. 

 Cam. luc. 



Fig. 3. Aulacantha Icsvissima Haeckel, p. 1026. Termination of a radial tube 

 in optical section, showing the denticulations. Cam. luc. 



Fig. 4. Aulographis moorensis, sp. n., p. 1026. A single terminal branch of a 

 radial tube, showing the denticulations and spathilla. Cam. luc. 



Fig. 5. Aulocoryne zetesios, gen. et sp. n., p. 1027. Termination of a radial tube, 

 showing the club covered with zigzag spines. This beautiful drawing 

 is due to the skill of Miss Mabel Green. 



Fig. 6. Aulocoryne zetesios, gen. et sp. n., p. 1027. A single zigzag spine. 

 Cam. luc. 



