197 
and spring from swollen bases 2 mm. apart, their ocular bulbs are 
rounded and symmetrical. The rest of the body is covered with 
irregular polygonal tubercles which usually are partially sub- 
divided into minor tubercles, those on the tail are round, small 
and entire. At the origin of the left facial groove, two small 
lobes spring from the mantle, they measure together 2x4 mm., 
these are undoubtedly the homologues of the lobes which attain 
so great a development in the Naninidce. I have observed them 
in other Hadrce , but am not aware whether these rudimentary 
lobes are common to other divisions of the helices. 
Jaw arched, crossed asymetricallv by nine stout flat-topped ribs 
of various widths, the central the narrowest, denticulating both 
margins, ends smooth, angled. 
Radula strap shaped, three times as long as broad, rows flattened 
bracket ( — * — ) shaped, formula 180 rows of 39:18:1:18:39; 
rachidian reflection unicuspidate, linguiform extending along two- 
thirds of a base which is longer than wide and slightly expanded 
posteriorly ; the immediate laterals are also unicuspidate and 
linguiform, twice as large as the rachidian, the reflection cusp 
falling short of the margin of the base whose alate angle is curved 
and acuminate, the distant laterals are more slender and inclined 
projecting past the basal margin ; the marginals acquire proximal 
and distal accessory cusps which increase in size proportionaly as 
the ranks retreat. 
In the genitalia the penis sac is expanded into a wide reniform 
dilatation and bears at its apex a slender flagellum 15 mm. in 
length, the ovoid spermatheca is seated at the termination of a 
long duct. 
