170 12 



or oval, with a largest diameter of 1*25 — l - 5 mm , and showed the pupil whitish, framed 

 inwardly by a brownish yellow ring, and outwardly by a somewhat broader, light ring. 

 The tufts of the back were whitish , only at the hinder part of the back brown at their 

 base. The nether lip of the marginal furrow of the fore end of the foot had fine trans- 

 versal furrows perpendicular on the margin ; in about the first third part of the foot-brim 

 were found whitish small tubercles, in the other part whitish, narrow transversal furrows; 

 the sole of the foot had numerous confluent grayish points and spots. 



The intestines were nowhere to he seen from the outside, only the eyes might be 

 seen indistinctly before and outside of the rhinophorium. 



The form was the common one. The nether lip of the furrow of the tentacle 

 projected somewhat lobately at the base; on the tentacles were seen several villi of the 

 common kind , among which one was almost as long as the tentacle itself. Between the 

 tentacles, at the fore end of the head, some small villi were found. On the rhinophores 

 (fig. 33) these villi were feebler as on the tentacles ; above on the forepart of the body 

 they were almost wanting, while below towards the foot 1 — 2 series of such villi were 

 seen. The seminal furrow was very conspicuous, yellowish white, almost flat. On the 

 hinder part of the body (with the rudimentary foot-lobes (gill-covers)) were seen 4 — 5 

 irregular series of villi (with 7 — 8 villi in each series). These villi had a height of up to 

 1.5mm. they were simple, of a tapering conical form (fig. 31), mostly a little compressed, 

 sometimes, especially the hinder ones, dividing into several ends, or compound (fig. 32). 

 The gill-slit was narrow, wider at the fore end, the gill-cover rather thin. The foot of 

 the common form, the foot-lobes very small; the convex anterior margin with projecting 

 corners, the brim not quite narrow, at the margin smaller villi were seen, especially at 

 the end of the mentioned transverse furrows ; the tail had an only little conspicuous 

 dorsal crest, also provided with villi. The wide gill- cavity (fig. 1) had a length of 

 1 l mm by a breadth of 8 mm . On account of the wanting of a shell no mantle-plate was 

 found in this cavity, but the organs were uncovered. Anteriorly the papilla of the vulva 

 (fig. 10 f) was seen; it had a length of l-b mm , was black dotted, curved, freely projecting, 

 and slit in the right side. Behind this papilla the pericardium and the kidney were found ; 

 the former had a somewhat oblique position , and the right part of its upper surface was 

 black spotted. To the right of the kidney the strong gill curved backwards; it was black 

 spotted at the base of the upper surface, otherwise with transverse, dotted stripes; it had 

 a length of 9 mm , by a height of up to 4 mm , and a thickness of up to 3 mm ; the lower side 

 was yellow; half of it was not attached. To the left at the base of the gill the distinct 

 reno-branchial opening was found. Behind the base of the gill and turned towards it the 

 rectum was seen; it had a length of 3 mm , was black dotted, and somewhat bent to the 

 left; the end of the rectum projected as a free anal papilla (fig. 1 a). At the floor of the 



