

ROPODA 



ich other, almost globular; the cerebral ones win- a little 



.1 ganglia proceeding downward and inward from the mass ol 



•mm, a little larger than the cerebral ones, conne< 



liich was shortei than the diametei ol the ganglia. The buccal and gastro- 



the t\ pi< al species 



Tli, diametei with a black pigment, and dark yellow lens of a diameter 



bulbus pharyngeus was 6 mm long, by a breadth of .s'.s 1 "'". and a height before "i i 



its form was as in tin.- typical species. On each side "i ad labial disk was seen 



rregular, dirtily yellow stripe, which was formed of straight 01 irregularlj bent, 



iff. unequal!) Ion;;, unequally thick, colourless or slightly dirtily yellowish staves (fij 



length of at least a breadth of o-oo7 mn "i. The mandibles were about as long and 



tin.- bulbus pharyngeus, lemon-coloured, <>nly in the hinge-part of a black-brown colour. The 



m in front and above together with its prolongation as in the typical species; the 



masticat short with a not large number (at most ra.50) of denticles which only reached to 



a height of and were rather worn and blunt The secondar) (supplementary) oral cavities 



.t, and their opening not narrow. The tongue as usual short, powerful, and keelshaped, 



with a long foremost, and short upper edge (fig. 28). In the radula, which on account of the median 



ow, were counted on the fore edge of the tongue 11 s t ii(.-> of tooth-plates, and marks 



aftej several that had fallen off, and on the short Upper edge three series; the continuation of the 



radula in its sheath in the greatest length light red, and containing [6 series of tooth-plates, of which 



the two hindmost ones were not \et developed; the total number of series was thus 30. The fo 



were very incomplete, and most of the teeth on the tongue were much worn. The breadth 



■ median teeth was o-i8""", in the hinder part of the tongue it rose to 0-22""", and upon 



the whi The strongly coloured median tooth-plates had a strongly projecting 



:i this and to both sides of it was found a not very large number (most frequently about 25) 



of n ong denticles (fig. 4). The number of the almost colourless lateral tooth-plates varied 



from 13 to [5; the innermost plate was a little smaller than the following one, they decreased in size 



d the two outermost ..iks, especially the ven outermost one, were small; none of them 



. ii the whoU- length of the radula) any trace of denticulation (fig.5) 2 ). 



The salivary glands were as in the typical species. 



Tin- oesophagus in the first (3 mn long) part is rather narrow, then widening and with 



nun mgitudinal folds that shine through on the exterior, running on and between the two 



altogether about i| long. The thinwalled stomach, which is also provided with 



nun mgitudinal folds, is almost globular, of a diameter of 5 mm , and situated before the principal 



that I have examined earlier, 11.. traces •■! such .i prehensile rinj; were 

 mined individuals of D.arbot peciinen of /'. thi prehensile ring was 



tin- lateral teeth a ilmost quite without denticulation; <>n the 



ilighl .mil irregular denticulation. Tin- denticulation "f tin- lateral 

 ■ whole always much varying. 



