49 207 



papillae were sessile, below somewhat narrower, above broader with the edge more or less 

 indented; their inner side was flat and almost smooth, while the outer side was somewhat 

 arched and covered with rounded papulae, as were also the edges. The anal aperture 

 was before the second papilla (of the right side). The somewhat arched sides of the 

 body were covered with white, mostly somewhat conical papulue; between these papulae 

 similar ones were found sparingly scattered, most of which were retracted towards their 

 base, brownish, of a diameter of about 0'75 mm . Before (on the right side) the contracted 

 genital aperture was found surrounded by papulae. The narrow foot projected a little 

 anteriorly, its rounded fore end was provided with a marginal furrow, the foot-brim was 

 relatively broad ; the sole of the foot was of almost the same breadth through its whole 

 length ; the tail was a little tapering. 



The intestines were nowhere to be seen from without, which was, however, the 

 case with thin muscular strings running along the whole length of the sides of the body. 

 The walls of the body were rather closely connected with the intestines by a loose connec- 

 tive tissue. The cavity of the body did not reach to the last of the dorsal papillae. 



The central nervous system which was only with difficulty to be prepared off 

 from the closely attached covering of connective tissue, was about like that of M. papulosa 

 (comp. I.e. 1884. p. 148. Taf. Ill, Fig. 5, 14d); its surface was rather uneven; the nerve 

 cells had a diameter up to 02 mm . — The quite ^short-stalked eyes had a diameter of 

 016 mm . The oto cysts had a diameter of - 12 mm , with rather numerous otoconia. The 

 skin showed everywhere the common large number of glandular cells. 



The outer mouth (below at the bottom of the cowl) is set with quite small white 

 cones; also the inside of the buccal lube is covered with such cones more close-standing; 

 this latter is separated from the bulbus pharyngeus outwardly and inwardly by a furrow. 

 Both the buccal tube and the pharyngeal bulb are wrapped with a closely adhering con- 

 nective tissue; the length of both together is 5 mm by a diameter of 3 - 5 mm ; the long retrac- 

 tors of the pharyngeal bulb are as those of M. papulosa. The inside of the small pha- 

 ryngeal bulb shows slight longitudinal folds set with very small papillae. The mandibles 

 joining above, are of a form about like that of other Melibes (Gg. 7), somewhat curved 

 longitudinally, of a length of 2 - 25 mm , divided by a longitudinal ridge into an inner yellowish 

 part and an outer (whitish-) colourless part; the masticatory edge is finely dentate in the 

 upper part, in the lower pari provided with coarser, rounded teeth. 



The salivary glands were as usual, small (l mm long), uneven, whitish. 



The oesophagus had a length of 4 mm by a diameter of 2 mm ; the fine folds of its 

 inside cease abruptly by the transition to the stomach. The stomach bad a length of 

 6 mm , by a diameter of 4 mm , its form was oval ; the belt of the stomach plaies shines through 

 in about the first half of it, and immediately before the belt the foremost liver branch is 



