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(it is to be noted tb at the distal double row is here counted singly). C. Claus makes no direct
statement as to the shape of these spines; he only denotes the distal ones as „Häkchen“, the
proximal ones as „Hakenspitzen“. G. \Y. MÜLLER denotes the distal ones as „kräftig, solid“,
the proximal ones as „borstenförmig“. As far as I could see (with Reicheut’s ocular 4. LEITZ’s
immersion yiS!) the distal spines are of about the type reproduced in the accompanving figure 5,
i. e. they are furnished along the side that is turned towards the point of the bristle with a
wing-like appendage and with a more or less narrowly oval plate distally; the more proximallv these
„spines“ are situated on the bristle, the smaller the wing-like appendage and the distal plate
become; on about the eighth to the tenth pair of spines these appendages are scarcelv perceptible;
the proximal spines are narrow and pointed. Distally of these rows of spines this bristle is
quite bare.. (More or less distally pointing spines such as are found in several species of this
genus, e. g. C. oblonga, are thus quite absent.) Just distally of these rows of spines this bristle
is bent at a rather decided angle; the part of the bristle distally of this knee is not widened.
On the anterior side this bristle is almost quite bare. The b- and d-bristles are in most cases
bent at a rather distinet angle at about the corresponding place as the e-bristle and are not
widened distally; at about the corresponding place as the rows of spines on the e-bristle they
are furnished rather sparsely with short, exceedingly fine, distally pointing spines. None of
these three bristles has pad-like formations. The a-bristle is relatively long (see the accompanying
fig. 4); when it points backwards, it reaches in most cases to about the middle of the first joint
of this limb, sometimes it is rather slightly shorter or longer; it has no accessory saccule. The
c-bristle is quite short, about as long as or rather slightly longer than the distal height of the
second joint. This bristle is more or less straight; the a-bristle too is most frequently rather
straight, at any rate it is not strongly rolied up. All the joints are quite bare.
Second antenna: — Protop o dite: In specimens with shells about 1 mm.
long this part attained a length of about 0,5—0,55 mm. The distal-medial verruca varies
in shape, being in most cases somewhat irregularly lobate. Exopodite: The proportion
between the length of this branch and that of the protopodite is about 1 : 2. The proportion
between the length of the first joint and the total length of the eight foUowing joints is about 2 : 1.
The proportion between the length of the longest natatory bristles and that of the exopodite
is about 7 : 5. The first joint is in most cases quite bare, at least as far as I could decide with
Reichert’s ocular 4, Leitz’s immersion y12; sometimes, however, it is furnished
proximo-dorsally with more or less abundant weak spines. E ndopodite: First joint: 1 he processus
mammillaris has no distal verruca. The a-bristle has short, fine hairs, the b-bristle, which also
has short, fine hairs along the greater part of its length, was in all the specimens investigated
by me furnished with two rather long hairs somewhat proximallv of the middle; in a number
of specimens there were from about two to four moderately long hairs close to the two long
ones. Seepp. 703—706 below with regard to this character. Second joint: The c- and d-bristles are
in most cases somewhat shorter than this joint and have short, fine hairs, almost bare. The
e-bristle is extremely short (sometimes absent?). The g-bristle is about as long as or rather
slightly shorter than the protopodite; it grows gradually narrower distally and is furnished
with sparse short hairs. The f-bristle is of about the same type as the g-bristle, but is about
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