NUDIBRANCHIATE GASTEROPODA. 29 



liver, between and on the two anterior livers; near the pylorus it receives in front and below two 

 short and wide biliary duets from the anterior livers, and behind a similar duct from the principal 

 liver. To the right and upward the stomach opens into the intestine; this was in the first part 

 much distended (wider than the stomach), passes over the hindmost part of the right anterior liver, 

 bends downward along, and is attached to, the anterior genital mass, forms a large curve on the right 

 side of the principal liver, and then rises to the anal papilla; the whole length of the intestine was 

 275™ by a diameter generally of 075 — 1-5™; the inside of the intestine showed numerous longitudinal 

 folds, of which one was higher than the other. - The stomach and the foremost (distended) portion 

 of the intestine was filled with abundant, white and gray, black-dotted contents consisting of animal 

 substance, the greater part of wich could not be determined, mingled with pieces of Copepoda, bristles 

 of Annelida, cnidse, and grains of sand. 



Two anterior livers and a principal liver were found as usual, but separated from each 

 other to a smaller degree than is otherwise the case in the Deudronotidae. They were all of a dirty 

 yellow colour, very strongly lobed, and the lobes loosely connected; I did not succeed in substantiating 

 the existence of liver-branches going into the interior of the branchial tufts. The two anterior 

 livers were somewhat depressed, joining each other on the lower side of the stomach; from as well 

 the right as the left one a conical continuation, 4 — 5 mm long, runs up towards the base of the first 

 branchial tuft. The principal liver, together with the hermaphrodite gland which rested on and 

 was loosely attached to it, formed a conical mass, i8 mm long, and, in front, 9 mm broad, the fore end of 

 which showed deep impressions of the stomach and the anterior genital mass. It is possible that the 

 fore end of the liver passed directly into the two anterior livers. 



The large, flaccid ventricle of the heart was 4'5 mm long. The whitish pericardio-renal 

 organ 2 mm long, of the usual structure 1 ). 



The large, yellowish white hermaphrodite gland rises with its fore end a little over the 

 liver, along which it runs to its hinder end; it is composed of small, mostly roundish finely gritty 

 lobes, and in the lobules (the grits) there are ripe oogene cells and spermatozoids. The anterior 

 genital mass was large, a little compressed, 8 mm long, by a height of 8 mm , and a thickness of 4 mm ; 

 on the upper edge was seen in front a bundle formed by the windings of the spermatic duct; partly- 

 covered by this on the right side of the mass was the smaller bundle of the windings of the prostate 

 gland, and the spermatic vesicle; and behind those the closely set, corkscrew-like windings of the 

 ampulla 2 ) of the duct of the hermaphrodite gland. The male branch of this passes directly into the 

 prostate gland fornfed by the numerous windings of the spermatic duct; it was a little compressed- 

 globular, of a diameter of 2 mm . The freely projecting spermatic duct forms a larger bundle of loosely 

 connected windings measuring, when stretched out, about 4 cm . The retracted, thinwalled praeputium 

 had a length of 6"""; the strongly contracted (glans) penis was \ mm long, conical (fig. 29). The pear- 

 shaped spermatotheca (2 mm long) and the long vaginal duct as in the typical species. The greater 

 part of the anterior genital mass is formed by the powerful, limewhite and white mucous gland, on 

 its right side of a more gray portion (the albuminous gland). 



!) Comp. R. Bergh, Nudibranch des Willem Barents. 1885. Taf. II, Fig. 24 b. 



2 ) Comp. 1. c. 1885. Taf. II, Fig. 26. 



