BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND. 5. N:O 16. 23 
Habitat: California, Sierra Nevada, in stagnant water in 
meadows, never in the running streams. 
C. igneus n. sp. 
The cephalic ganglion is broadest in front, and its po- 
sterior margin is deeply emarginated. 'The two anterior pro- 
cesses are covered with several globular swellings. 
The penis-sheath is long and extremely narrow, its lower 
or exterior end is suddenly expanded and plate-like. From 
above this plate-like end the penis-sheath gradually increases 
in thickness towards the upper or inner end of the sheath. 
The oviduet is single and sack-like, especially so its lower 
end, in which cell-nuclei are plainly visible. The spiral 
museles surrounding the copulative organs are very strong 
and distinct, unlike those of the preceeding species C. spi- 
ralis. The receptacele is bent and sack-like, no spermatopho- 
res are found. The segmental organs are in all the segments 
furnished with a coating of perfectly globular cells, with 
plain nuclei close to the tube of the organ. The perigastric 
cavity contains free and floating perigastric cells. 
The integument of the body is extremely tender. Colour 
fiery red, under the microscope yellowish. Size of the body 
about 30 m.m. long by 0,75 m.m. wide. 
Habitat: California, Oakland, San Francisco, Santa Clara, 
in ponds. Adult in March. 
This species is especially remarkable for its fery red 
colour, which gives to the boarders of the pond, in which 
the animl lives, a very vivid appearance. Ihe shape of the 
cephalic ganglion and the plate-like extremity of the penis- 
sheath, are distinct characteristics of the species. 
C. corallinus n. sp. 
The cephalic ganglion is nearly square and its posterior 
emargination rectangular. 'The penis-sheath is gradually in- 
ereasing in width at its exterior extremity, which is some- 
what bent. The oviduct encloses the penis-sheath tightly, 
except its lower end, which is sack-like. The ovaries are 
short and bent at a right angle, in which the most developed 
ova are found. The receptacle is short, bent and sack-like. 
