REPORT ON THE NTJDIBR AN CHI ATA . 
131 
a loop of the intestine and traversed by the continuation of its right hand portion (ee) ; 
along the intestine on the left side is the sac-like ampulla of the glandula hastatoria (h). 
Behind the loop of the intestine and the anterior liver, is the dirty yellow-coloured 
masticatory stomach, of which the larger part of the left half is visible, with a whitish 
tendinous patch, and behind this the large dark greenish -grey hinder liver ( g ) ; on the 
right side of the liver and stomach lies the large whitish pericardium ( k ), fused with the 
wall of the body ; on its inner side and covered by it is the large anterior genital mass 
(fig. 26, b), extending as far as the right hinder portion of the liver, and lapping the 
yellowish-white hermaphrodite gland, wdiich fills (fig. 26, a) the hinder end of the body 
cavity. The hindermost end of the body is taken up by the black lung (fig. 27, i). Below 
the right salivary gland are visible the winding coils of the vas deferens, and further 
forward another portion of the same with the penis. Along the left side in a space are 
seen the coiled windings of the glandula hastatoria as a prolongation of its ampulla. — 
On the underside the situation of the viscera was as follows. Quite in front were the 
buccal tube and bulbus, then on the right the lower portion of the left salivary gland, 
and on its inner side the lower portion of the central nervous system ; then follows on 
the right the ampulla of the glandula hastatoria and its coiled prolongation ; on the inside 
of and behind this the radially striated third stomach ; on the left side of which, and 
behind, is the under portion of the anterior liver. Further back, along its right margin, 
lies the hinder liver ; on the inside of this, in front, is the transversely-placed anterior 
genital mass, behind which on the right, is the dirty-yellow vesicula seminalis, and on 
the left the yellowish hermaphrodite gland. The hinder end of the body finally is taken 
up by the black lung. 
The centred nervous system, which elsewhere in the genus Onchidium generally lies 
uncovered upon the upper side of the bulbus pharyngeus and the salivary glands, was in 
this specimen retracted, and surrounded the hinder part of the oesophagus, and was there- 
fore (PL V. fig. 27) quite covered by the anterior liver. It did not quite agree with 
v. Jhering’s 1 description of Onchidium verruculatum, Cuvier. It lay within a loose, but 
still adherent connective tissue capsule, which was prolonged some way along the roots 
of the nerves, and which could be only with difficulty separated from the ganglia. The 
ganglia themselves showed a greyish-brown colour. The central nervous system was, as 
usual, constructed of an upper and lower portion, both of which were considerably 
flattened. The upper portions — the cerebral ganglia — were of a rounded contour, and 
united by a strong commissure, about as broad as the diameter of the ganglion ; each 
ganglion gave off the following nerves : the strong nervus tentacularis supplying the 
tentacle, and giving off the delicate nervus opticus ; the nervus velaris, which divided 
into two branches ; at least two nervi orales, two labiales, and several nervi bulbi 
pharyngei ; finally a nervus genitalis externus to the penis, and the eerebro-buccal 
1 H. v. Jhering, Vergl. Anat. d. Nervensyst. d. Moll., 1877, pp. 230-232, Taf. iv. fig. 16. 
