BIDANG TILL K. SV. VET.-AKAD. HANDL. BAND. 9. N:O 16. 19 
Habitat: California, Sierra Nevada, at Seven Springs 
Meadow, on the east side of the north fork of Kingsriver at 
an altitude 8 to 9000 feet. 
L. alpestris n. sp. 
The cephalic ganglion is broadest behind, and in old 
specimens sometimes three-lobed. 'Phe ganglionic swellings 
of the ventral ganglion are almost circular. "Of the copula- 
tive organs proper the penis and oviduct are comparatively 
longer than in any other species of the genus. The lower 
end of the penis is pointed. Both the interior and exterior 
openings of the penis-sheath are funnel-shaped, the exterior 
one being the widest. "The interior oviduct is of the same 
shape as the penis-sheath, but somewhat longer. The exterior 
end of the exterior oviduct is sack-like, the interior or upper 
end of the same organ is very narrow and closely surrounding 
the lower end of the atrium. 'Ihe receptacle is enlarged at 
both extremities, the upper one being bent and helix-like. 
The segmental organs are comparatively short but surrounded 
by a thick mass of granulated matter. 
The body is about 25 m.m. long by '/> m.m. wide. The 
integument is very tender, causing the worm to be easily 
broken. 
Habitat: Sierra Nevada, California, in the mud of running 
springs at an altitude of 7000 feet. 
L. Silvani n. sp. 
Fig. 4. 
The cephalie ganglion; 1n the larger form, is nearly 
twice as broad as long and sometimes three-lobed, but in the 
smaller form the ganglion is much longer than broad and never 
three-lobed. The lower end of the penis proper is rounded 
and somewhat swelled. The penis is only half as long as 
its chitinous sheath, and only slightly thicker than the lower 
end of the atrium. 'The penis-sheath is, seen from the side, 
gradually tapering towards its exterior apex, with the ex- 
ception of an abrupt enlargement on the midle, just at the 
end of the penis proper. Seen from the front, however, it 
presents a very different appearance: It resembles in this 
aspect an arrow-head with a short round handle. The ovi- 
