I2 xrillBRANCHIATE GASTEROPODA. 



was lighter, yellowish. After being separated from the tongue it measured with its continuation 28 mm 

 in length , and when spread out $2™™ in breadth. On the radula was found 35 rows of teeth (mea- 

 sured along the outer margin), and farther back 24 rows, about six of which were not yet fully deve- 

 loped; thus the total number was 59. About the twenty foremost rows were more or less incomplete, 

 and the tooth-plates often injured. In the rows were found up to 116 tooth-plates on each side of the 

 median tooth 1 ). The length of the median tooth was about o-5 min by a breadth of o-22 mm ; the lateral 

 teeth measured along the backside up to o-95 mm ; the lengths of the 6 outermost teeth were: 0-40 — 043 

 — 0-45 — 0-48 — 0-5 — o-6 mm . The median tooth is flat, rather thin, somewhat lengthened (fig. 7a, 8) with 

 an excavated fore end, and a straight hinder margin over which projects a little truncate, median 

 cone; the fore part rises obliquely in a short rounded hook (and the hooks on all the median teeth 

 were of the some form). The lateral teeth (fig. 9 — 13) are longer, and have a much more powerful 

 base, from which the tapering hook rises obliquely and rather slantingly; the margins of the hook, 

 especially the inner one, project freely anteriorly; otherwise the length and breadth of the hook is 

 somewhat varying. Towards the margin of the rasp the lateral teeth decreased (fig. 12 — 14) consider- 

 ablv in strength and were narrower. In the 6—8 outer ones, especially the very outermost, the hook 

 was considerably reduced (fig. 12 a). Double teeth, so frequent in the nudibranchiata , were not want- 

 ing (fig. 15). 



The salivary glands are strongly developed, and cover (pi. II, fig. 1 cc) the sides and partly 

 the lower side of the stomach, where they join almost in the median line. They are somewhat flat- 

 tened especially above, of a thickness of 1 — 9 mm , yellowish white, somewhat lobed in the margin, 

 especially the left one; this latter was larger than the right one, its length was 22 mm by a breadth of 

 also 22"'" 1 ; the rigth one was 32 mm long and 14™'" broad. At the fore margin of the gland the salivary 

 duct was seen widening at its fore end into a little ampulla (fig. 1; 4c); the length of the duct with 

 the ampulla was almost io mm . 



The oesophagus (pi. II, fig. 1) was of a dark bluish-gray, about n rara long with a diameter of 

 9"""; the longitudinal folds shone through indistinctly. The oesophagus passes by degrees into a first 

 stomach, also dark bluish-gray, bag-shaped, of a length of 3'5 cm with a diameter of I7 cm . This 

 stomach appears rather thickwalled on account of the not very numerous (ca. 12), but thick and pro- 

 jecting, wrinkled longitudinal folds, which were slightly to be seen from without, and which partly 

 continue anteriorly into the folds of the sesophagus, become lower posteriorly, but for the greater 

 part continue into the folds of the second stomach. The inside of this first stomach is quite dark 

 blue. Through a slight constriction also indicated exteriorly (pi. II, fig. 1) this stomach passes into 

 tin- second stomach, situated to the left, $-6"" long with a diameter of i'4 cm , and exteriorlv of a 

 yellowish white colour. It is also rather thickwalled, its yellowish inside that is finelv dotted with 

 bearing a small number (ca. 12) of highly undulated folds stopping short at the aperture of the 

 biliary duct. Here the yellowish white intestine begins which all the way from the pylorus is rather 

 thinwalled. It (pi. II, fig. idddd) stretches backward along the left margin of the liver, bends behind 

 the middle of the length of the liver over the upper side of it, and runs to the right and forward 



') In the before examined form the number of rows on the tongue was 55, and the total number 75; the number 

 of the lateral teeth was iw on each side. 



