698 PROCHEDINGS OF THE NATIONAL MUSEUM. VoL. XXXIV. 
= 
The main nerve cord lies in the same frontal plane as the excretory 
canals, as is also the case in C. marmote. From:a plexus in the pos- 
terior part of each proglottid a conspicuous branch passes toward the 
margin of the segment, a smaller branch passing inward. Above and 
below the main cord are a dorsal and ventral cord, respectively, the 
former being also dorsal of the genital canals. In the posterior part 
of each proglottid, commissures connect the three nerve cords on each 
side, as stated for C’. pectinata by Lyman (1902). 
The longitudinal muscles run in two general series made up of 
separate bundles. These muscle sheets lie external of the reproduc- 
tive, excretory, and nervous systems. The inner bundle extends just 
past the proximal end of the cirrus pouch, the outer continuing nearly 
to the margin of the segment. The same appears to be true of 
Lyman’s specimens of C. pectinata, though he states that the two 
muscle sheets finally meet near the lateral margins. Inside of the 
inner longitudinal plate, the transverse muscles form a sheet of vary- 
ing thickness. Here again I am unable to confirm Lyman’s state- 
ment that there are two such sheets in C. pectinata, his specimens 
presenting the same appearance in this respect as those of C. mosaica, 
_ Where the inner sheet of longitudinal muscles recurves the transverse 
sheet passes on through them to the outer layer. External to the 
outer longitudinal sheet 1s a set of fine muscle fibers, running ina 
general antero-posterior direction but tangential to The longitudinal 
fibers (fig. 4). Narrow sagittal fibers traverse the proglottid dorso- 
ventrally. 
Types of this species have been deposited in the U. S. National 
Museum, Helminthological Collection, No. 7147 (type) and 7148 
(paratype). 
A hasty comparison of specimens of the European and American 
C’. pectinata shows certain differences that should be determined as 
accidental or shown to be of specific or subspecific importance, and 
the writer hopes to publish a note on this in the near future as soon as 
additional material can be obtained. 
BIBLIOGRAPHY. 
1891. BLANCHARD, RAPHAEL. Sur les Moniezia des rongeurs, (Notices helmin- 
thologiques, deuxiéme série. No. 8), Mém. Soe. zool. de France, IV 
(Nos. 8-4), pp. 450-466. 
1892. CurTICE, Cooper. Parasites, being a list of those infesting the domesti- 
cated animals and man in the United States, J. Comp. M. & Vet. Arch., 
N. Y., XIII (No. 4), Apr., pp. 225-236. 
1900. ‘““D. K.” Sheep are infected by rabbits, Amer. Sheep Breeder, Chicago, 
XX (No. 9), n. s. XVII (No. 9), Dec., p. 488. 
1906. von LINSTow, OTTo FRIEDRICH BERNHARD. Helminthes from the collec- 
tion of the Colombo Museum, Spolia Zeylanica, Colombo, Pt. 11, ITI, 
Jan., pp. 163-188, pls. 1-111, figs. 1—55. 
