24 EISEN, PRELIM. REPORT ON GEN. AND SPEC. OF TUBIFICIDA. 
The segmental organs in front of the cingulum are all fur- 
nished with globular cells, but those in the segments behind 
the cingulum are void of the same. No glandular cells round 
their interior opening. 
The colour of the body is yellowish red, with a light or 
not coloured band between every segment giving to the 
worm somewhat the appearance of a string of coralls. The 
last posterior segment is five or six times larger than the 
segments preceding it. The length of the body is variable, 
the general size being 25 to 30 m.m., but sometimes it rea- 
ches 60 to 70 millimeters with a width of 1 to 1,5 m.m. 
'The integument is tough, giving some tenacity to the body. 
Habitat: California, Fresno Co, in ponds, or even in run- 
ning waters, Kingsriver, Big Dry Creek, always near the 
level of the prairie. 
C. californicus n. sp. 
Fig. 6. 
The cephalic ganglion is nearly square, but well rounded 
behind, with a shallow emargination. The copulative organs 
are strongly built, and the lower end of the penis-sheath is 
suddenly increased in size, but its extremity is not plate-like. 
The oviduct is single, surrounds the penis-sheath perfectly, 
its lower end is however sack-like, resembling the same or- 
gan of C. corallinus. The spiral muscles are heavier than 
in any other species of the genus. The segmental organs 
are not furnished with globular cells. "The body is of about 
the same size, colour and tenacity as that of C. igneus. The 
tail is distinetly segmented. 
Habitat: San Francisco and surrounding places, such as 
Oakland, Lagunitos, Russian river, in ponds or stagnant water, 
only seldom in the streams. 
The species of this genus being difficult to distinguish 
from each other, the following summary of their princi- 
pal characteristics may prove useful. 
C. spiralis has a double oviduct, its penis-sheath re- 
sembles that of C. igneus, but is comparatively shorter. 'The 
copulative organs have also some resemblance with those of 
L. alpestris, but this species has no spiral muscles. C. igneus 
has a single oviduct, but the penis-sheath is gradually in- 
creasing in size from the middle towards the lower or exterior 
