MEMOIUS or TIIK NATIONAL ACAlUvMV OF SOIKNCKS. 331 



XXXIII. I'r.iin !i uiicrophotoKraiili of ii liorizoiitiil section tliroiiuli the briiiii of a yoiinR Limiilus, involvinj; 



part of the u<siipliaKi>ul ring ami K'xiKlia of the four autoriur u|iiii'D<la);cH. (Soction 32.) 



XXXIV. Tlif Naiu«, involviuK tlio six ganglia i>n one side of tlic <i>Ko]ilnig<iil ring and (In- f>rigin of lh«i connmliveH 



of tho aluloniinal ]>ortion of tlin nprvon.-i curd. (Section 40.) 



XXXV. Th« «anu> (srction 4«) unido Iiixvi»r down, Bhowing tho same ganglia, with their largo ganglion lells, and 



origin of the nerves to the six eephalothoraeic appendages. 

 XX XVI. .Sagittal section through the lirain of a young Liniulus, showing the dark masses of chromatic gangliiui 

 cells contrasting with the tibruus and punctured sultstance; con., cemnective passing to the 

 u'sophageal ring. (Section 39.) All the microphotograiihs were taken by Dr. W. M. (iray, 11. S. A. 



