H. D. SRIVASTAVA                                 329

In its systematic relationship the new species, B. belonea, stands nearest to
B. karvei. It resembles the latter in the shape of the body and the excretory
bladder, in the large size of the anterior sucker, relative positions of gonads,
pharynx, excretory and genital pores and the position and the extent of
vitellaria. B. belonea, however, differs from B. karvei in being twice the size
of the latter and with most of its internal structures four times or more the
size of those of the latter ; apart from marked differences in the anterior extent
of the cirrus sac which stops at the posterior level of the anterior testis.

[NLS note: a graphic appears here - see image of page]

                                        Fig. 6.
                     Buccphalopsis garuai, Excretory system.

Specimens from
P. garua.

Specimens from
S. gangetica.

Length of body . . . .

5.73—6.2

3.0—5.96

Maximum breadth . . .

1.38—1.9

1.26—2.8

Anterior sucker . . . .

0.56— 0.69×
0.59—0.69

0.5—0.72×
0.48—0.72

                        BUCEPHALOPSIS GARUAI Verma, 1936.

Host— Silundia gangetica Cuv. and Val.
Habitat—Intestine.
Locality—Allahabad.