NUDIBRANCHIATE GASTEROPODA. 13 



to the middle of the right margin of the first stomach, forms here a knee, and stretches backward 

 along the right margin of the liver continuing' over its hinder end up to the anal papilla (pi. I, fig. 1). 

 The whole length of the intestine is 25 cm by a diameter varying between 10 — 15™'". The inside of the 

 intestine shows on the middle of the under side particularly fine transverse folds while the rest of the 

 wall chiefly has very fine uetforming folds; through the middle of the above mentioned finely trans- 

 versely-folded part a prominent longitudinal fold stretched for a great part of the hindmost part of 

 the intestine. The wall of the hindmost part of the intestine was more smooth. — The alimentary 

 canal showed through almost its whole length from the cardia to the rectum abundant, as it were, 

 clayey, dark yellowish gray contents, partly quite loose and incoherent, partly forming soft lumps 

 of a length of almost up to 2 cm and a diameter of i cm . These contents consisted of the above men- 

 tioned clayey mass with grains of sand, mingled with half disorganized animal substance, with Poly- 

 thalamia, Diatoms, and pointed silicious spicules; also a piece of a wormlike animal, full 2 cm long, 

 and almost disorganized, was found. 



The very large, dirtily dark brownish gray liver was 7-2 cm long by a breadth of up to ^-2 cm 

 and a height (behind) of 37 cm ; its contour was roundish, the fore end a little more pointed than the 

 rounded hinder end (pi. II, fig. 1). On the upper side of the fore end was found an impression of the 

 first and especially of the second stomach, along the greater part of the left margin was seen a furrow 

 for the intestine, which at the beginning of the hindmost third part of the liver bent inward over its 

 upper side, and on its way forward was situated in a broad and deep furrow continuing in a more 

 superficial one along the right margin of the liver. The surface of the liver was smooth, with only 

 superficial furrows, partly from vessels. Below on the left margin was found the short and thick 

 biliary duct of a light dirty yellowish colour (g mm long by a diameter of 6 mm ); it opened at the 

 pylorus of the second stomach, and led into a not very great cavity, on the walls of which 3 — 4 large 

 openings were seen. The biliary duct and the cavity of the liver were filled with masses like those 

 in the alimentary canal. No gall-bladder was found. 



The large pericardium, 37°'" long, and 4 cm broad, covered the middle of the liver; folds 

 before on its under side (the pericardial gill) were very distinct. The yellowish ventricle of the 

 heart was 23 mm long by a hindmost breadth of io ,nm . - The large, whitish, flaccid blood gland 

 was resting on the pharynx, partly attached to the salivary glands, of a length of 2-3"" by a breadth 

 of (before) i cm , (behind) i'5 cm ; before it was rounded, behind straightly curtailed; its thickness was 5 mm ; 

 it appeared to contain a cavitv with folds on the thin walls, but was torn on the under side by the 

 preparing out of the central nervous system; a strong artery ran to the lower side of the organ. 



The fine, large, brown-yellow kidney (pi. II, fig. 1) covered the whole hermaphrodite gland 

 and large part of the upper right side of the liver; with its branches it stretched partly under, partly 

 here and there over the intestine; it was rather firmly attached to its underlayer. It was composed 

 of very stronglv branched principal stems, some foremost and more hindmost; the stems as well as 

 their branches were in a most varying manner set with leaves, folds, and ampullse often forming, as 

 it were, greater and smaller grapes. All these growths on stems and branches were as usual composed 

 of closely crowded small cells. About the middle of the kidney (fig. 1) the stems appeared to lead 

 into a urinal chamber continuing in an ureter running backward along the inner margin of the 



