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Sixth limb: — The second exopodite joint is rather short, somewhat rounded and
furnished witli rather numerous bristles. Its posterior distal bristles are not strikingly larger
than the others.
Seventh limb: — This is furnished with rather numerous cleaning bristles, a
large number of which are placed very close together distally, the rest being scattered irregularly
along the distal part of the limb. With regard to the situation of these latter bristles it is to be
noted that more than one bristle is exceedingly seldom or perhaps never found on the same side
of the same joint. The end comb consists of a moderate number of moderately strong teeth, firstly
some rather long distal teeth more or less pointed distally, smootli except that they are furnished
at the middle on botli sides with a small secondary spine, and decreasing somewhat in length
the more proximally they are situated, secondly somewhat shorter and broader proximal teeth,
transversally cut off distally. Dorsally close to the end comb the wall of the limb is somewhat
thickened and is furnished with a few wart-like chitinous processes. In addition it is slightly
concave here; the dorsal and ventral walls of the cavity are not moveably joined to each other,
but can, all the same, be pressed against each other 1 ike a jaw to some extent; when this happens,
the distal teeth of the end comb are pressed in towards the dorsal wall of the cavity. The
compression is carried out by a short, powerful, paired muscle, issuing proximally somewhat
proximo-dorsally of the point of the limb and fixed distally to the bottom of the cavity.
Furca: — The lamellae are rather short. The number of claws is about nine, without
any clear division into main claws and secondary claws.
Upper lip: - - This has only one large, rounded and quite undivided glandular
held, directed forwards (corresponding to the uupaired dorsal glandular field in closely-related
forms?). Ventrally of this there are on both sides some low pegs with glandular openings
(corresponding to the two paired lower-posterior glandular fields in closely-related forms?). The
ventral side is quite without glandular openings.
The rod-shaped organ is comparatively small.
The lateral eyes are well developecî.
Remark: — It is certain that not more than one species of this sub-genus lias been
de-scribed in the literature, namelv the one dealt with below, which is tlius to be eharacterized as
the type-species.
C. (Macrocypridina) caslanca G. S. Brady.
Cypridina castanea, G. S. BRADY, 1897, p. 88; pl. XVI, figs. 1—4.
„ ., G. W. Müller, 1906a, p. 130; pl. V, figs. 1, 2; pi. XXXI11,
figs. 11—10; pl. XXXIV, fig. 10—13.
„ ,, ,, ,, ,, 1906b, p. 13.
?„ obesa, V. VAYRA, 1906, p. 07; pl. VII, figs. 132b—112.
castanea, G. H. FOWLER, 1909, pp. 279. 296; pl. 20, figs. 279—281.
„ „ G. W. Müller, 1912, p. u.
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