212 54 



set with several (up to about 12) close-standing (quincuncial) series of cones, which had 

 a height of up to 0'012 mm , and were somewhat indented at the mouth-edge. The second- 

 ary mouth cavities were rather wide, and their back wall was lined with a strong yellow 

 cuticle. The tongue had a long lower edge and a short upper one; on the former was 

 found in the larger specimen 10 series of tooth-plates, on the latter 3 such series; in 

 the smaller respectively 12 and 2 series were found. In the long radula-sheath was found 

 in the former specimen 20 fully developed series and two undeveloped ones, in the latter 

 specimen 17 and 2 series. Thus the total number of series of tooth-plates was 35 and 

 33. The median tooth-plates were light yellow, the lateral ones almost colourless. The 

 breadth of the median plates was 006 mm , their height - 035 mm ; the length of the lateral 

 ones was mostly - 10 mm . The median plates (flg. Ha) were rather low, the cutting edge 

 had 6 — 7 pointed denticles, the basal plate was anteriorly deeply notched. The lateral 

 plates (flg. 1 1 b) were much flattened, thin, highly notched in the fore edge, and the outer 

 leg of the basal plate was longer than the inner one; the tapering hook showed on the 

 inner edge 8 ( — 10) short, pointed denticles. 



Besides common salivary glands {Gl. salivales) also secondary salivary glands 

 [Gl. ptyalinae) seemed to be present. 



The oesophagus was short. Into the roundish stomach opened on either side 

 a biliary duct, and posteriorly the larger duct of the principal liver. The intestine was 

 rather short. 



The hepatic lobes of the dorsal papillae were long, sometimes somewhat bent in 

 a serpent-like way, with even surface. The yellow liver-branches issuing from the base of 

 these lobes united at the base of the series, and branches of 2 — 3 series formed larger 

 stems shining very distinctly through the clear dorsal brim. At the end of the dorsal 

 papillae the cnido-bag was found as usual, it was pyriform, of a length of up to - 7 mm , 

 by a diameter below of up to - 30 mm ; besides smaller elements it contained larger ones 

 of a length of 0'037— - 045 mm (fig. 12). (In the buccal cavity of both specimens a count- 

 less number of these large cnidæ was found.) 



The yellow hermaphrodite gland was of the same breadth as the back proper, 

 and ran to the end of the body; in its close-pressed roundish lobules developed sexual 

 elements were found. — The anterior genital mass was roundish, of a diameter of 

 2 - 25 mm , yellowish and whitish. The bag of the penis showed the unarmed glans. 



