NOTES ON AMPHITRBTUS. 



89 



The ganglia corresponded in position with the suckers and, like these, 

 became smaller and more closely approximated together towards the 

 distal end of the arms. 



The moderately large eyes are very conspicuous on account of its 

 brilliant coloring. The bulbous inner end had a shining dark purplish 

 or bluish ground-color, dotted with madder-brown chromatophores. The 

 conical outer end was marked with rings of reddish, purplish and of a 

 light color. The eye-bulbs projected out from the inner opaque head- 

 mass, but were in reality not freely outstanding. Around them existed 

 the peripheral gelatinous layer in nearly undiminished thickness as 

 elsewhere in the neighborhood, and they reached the external surface only 

 with the pupilla! end. 



The comparatively large siphon, as it lay obliquely anteriorly 

 directed, was similarly covered up by the peripheral gelatinous layer, so 

 that it nowhere projected outwards on the real external surface, except 

 perhaps at the edge of its external opening. But this opening, as also 

 those of the mantle-cavity, remained unascertained in the fresh state 

 of the specimen. The way both the eyes and the siphon lie buried in 

 the gelatinous tissue may be said as exactly comparable with the con- 

 dition obtaining in Alloposus. 



Of the contents of the mantle-sac there were some that could be 

 oriented, though more or less indistinctly, from the outside. An ill- 

 defined patch of deep purplish or bluish tint behind each eye probably 

 had some relation to the liver. A median brownish tract, between the 

 patches just mentioned indicated the stomach. On either side of the 

 body the gills showed themselves as oblong whitish masses. Two pale 

 yellowish spots behind and inside the gills were in all probability refer- 

 able to the branchial hearts. 



So far, the appearance of the specimen in the fresh state. Our 

 further study was done after the preservation. 



Description of Ihe specimen in the preserved state. 



For the preservation Flemming's fluid and alcohol were employed. 



