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bristles have about the same length in relation to the antenna as m the type species. The
distal c-, f- and g-bristles have considerably fewer lilaments and the sensory bristle of the fifth
joint has also somewhat fewer filaments, as is shown in the following table. (The lengths
triven are the averages of right and left first antennae; often, however, the right and left bristles
were quite equal in length; the difference was never great.)
Seasori il bristle of the 5th. joint. b-bristle. c-bristle. f-bristle. g-bristle.
N umber Length. Number of Length. N umber of Length. Number of Length. Number of Length.
filaments mm. filaments mm. filaments mm. filaments mm. filaments mm.
[ Right. 13 1,8 5 0.8 12 2.7 13 2.8 15 3.5
a-specimen { Left. 13 5 12 13 15
b-specimen r Right. 13 2.3 5 1.2 12 3.2 14 3.3 15 4,0
1 Left. 13 5 13 14 15
In other respects this limb is like that of the type species.
Second antenna: — This is very like that of the type species. In specimen a
the end bristle on the endopodite was about the same length as the endopodite, in the other
specimen it was relatively somewhat longer (endopodite : end bristle = about 25 : 30).
M a n d i b 1 e : — P r o t o p o d i t e : Basale : In specimen a the longest c-bristle had
a few long secondary bristles in the middle, in the other specimen this bristle had only short
hairs, as in the type species. Exopodite: The distal bristle is of about the same length
as the exopodite or slightly shorter. Endopodite: The first joint: In specimen b there were
on the right mandible — contrary to all the other forms of this family investigated by me —
five ventral bristles, the shortest one of the four that appear normally was duplicated (presumably
an abnormality). Second joint: The bristles on the anterior side are subject to rather great
variation ; on specimen a there are about ten to fourteen more or less long bristles of varying
length with sparse, short hairs and a relatively rather small number of cleaning bristles either
not arranged at all or arranged only in indistinct rows (about ten to twelve) : the cleaning bristles,
as in the type species, vary somewhat in length; they are all bare or have exceedingly fine
pecti-nation; the other specimen was, with regard to these bristles, considerably more like the type
species, their number being only slightly fewer than in the latter, and among the cleaning bristles
the same types could be distinguished. On the posterior side of this joint the former specimen
had, in addition to the two distal bristles situated near each other, two to four more bristles,
the latter specimen three more. In other respects they were like the type species.
Maxilla: — Protopodite: The first endite has twelve bristles, the right maxilla
of specimen a thirteen. The third endite has eight distal bristles, the right maxilla of specimen b
only seven; the equipment of these bristles is — as is the case with the rest of the endite
bristles of this limb — somewhat weaker than on the type species; bristles nos. 4—7 (4—6 when
there are only seven bristles), counting from outside, are quite smooth distally.
Exopodite: One of the two long distal bristles has only short hairs. Endopodite: First
joint: In specimen a this has three anterior and three posterior distal bristles, in specimen b the
right maxilla on this joint has four anterior and four posterior ones distally (as in the type
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