276 Journal of the Asiatic Society of Bengal. {July, 1906. 
specimen, and I think there can be no doubt that they should 
be referred to Baird’s species, S. dichotomus, as it has 
described by Prof. Sars (1900). I cannot detect any important 
di ome rather dil- 
tocephalus dichotomus. They do, however, differ rather markedly 
from the type, and I think it is perhaps advisable to consider them 
as constituting a variety to which the name Streptocephalus dicho- 
tomus, var, simplex may be given. The variety differs from the 
type in the following respects. In the second antenna of the male 
Ss. 
The female I have not seen. 
CLADOCERA. 
8. DAPHNIA FUSCA, n. sp. 
Description of female— 
_. Shell elongated oval in shape, bluntly pointed behind in the 
middle line, but without a spine in the adult condition (Fig. 12). 
The young are provided with a long toothed spine, sometimes 
amounting to one-third of the total length, but the spine appears to 
shorten and disappear with age. The edges of the valves are quite 
smooth, but. their surface is marked with oblique lines intersecting 
to form rhombic areas. The dorsal part of the head is reticulated 
in the same way, but over the eyes the cuticle is finely striated. 
The head is comparatively small, about one-fifth of the total length, 
without any crest, and is separated from the body by a very slight 
depression. The front is nearly straight; the rostrum long, deflexed 
«nd obtusely pointed. The fornix is rather prominent and continued 
over the eye. It is also prolonged slightly over the anterior part 
of the valves as an incipient secondary fornix. The eye is large, 
hi the crystalline cones almost embedded in pigment. The first 
not reach to the posterior end of the body, The postabdomen has 
erin 
! (I have inserted the locality, of which Mr, Gurney was unaware, 
-from records in the Museum.--N. Annandale, } 
