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the two inner ones, all pect inated distally; on the middle bristle, which is somewhat more powerfnl
than the others, the pectination is rather coarse. In addition these bristles have at the middle
on e or two wreaths of long, sti ff secondary bristles; the latter vary somewhat, sometimes
occurring on all the five bristles, sometimes only on the two inner ones. The third enclite
(fig. 17) has seven distal bristles, similarly rather powerful and of moderate length; the ones
situated most distally are somewhat shorter than the others. They are all weakly or moderately
strongly pectinated, and the three distal ones are usually furnished at the middle with one or
two wreaths of long, sti ff secondary bristles, which do not occur on the others. The proximal
bristle on the outside of this process is bare and about as long as the outside of the process. The
bristle dorso-distally of the coxale is relatively long, rather considerably longer than the outer
distal bristle of the third endite, being about half the length of the palp. Of the three
bristles on the boundary between the basale and the first endopodite joint the one that is
situated near the exopodite is rather long, being almost as long as the first endopodite joint,
the one on the anterior edge of the palp is about as long as the outer-distal bristles on the third
endite, the one at the middle of the inside of the palp being somewhat shorter; all three have
short, fine hairs or are almost bare. Exopodite: The three bristles of the exopodite
have fine, long hairs at the middle and short hairs distally ; the two distal of these bristles are
sub-ecjual, somewhat shorter than this branch, the proximal one is about half the length of these two.
Endopodite: (fig. 18) The chitinized postero-distal edge of the first joint projects slightly
and is only weakly lobed. Somewhat dorsally of this edge we find on the outside of this joint
two or three short, smooth bristles or processes of somewhat different lengths, of a strange hyaline
structure and directed upwards (shown in the figure by dotted lines). Distally on the anterior
edge of this joint there are two moderately long, subequal and rather weak brist les with short
hairs. Distally on the posterior edge there are three bristles, the posterior one of these being
moderately long but rather powerful, the anterior one, the shortest and weakest, only about
half the length of the former, all of them rather strongly pectinated distally. The end joint
is rather strongly chitinized and has thirteen bristles: Four a-bristles of moderate length, rather
strongly pectinated; three b-bristles of moderate length, of which the anterior one is of about
the same type as the a-bristles, the two posterior ones, on the other hand, being extremely powerful
and almost conical, with or without a few very powerful secondary teeth; three c-bristles of
moderate length, the posterior one being the longest and the- anterior one shortest; these too
are of about the same type as the a-bristles; three d-bristles somewhat longer than the b-bristles
but in other respects of the same types as these bristles; the posterior d-bristle is like the anterior
b-bristle, the two anterior d-bristles are like the two posterior b-bristles. Pilosity: The
first-endopodite joint has transverse rows of short, fine hairs.
Fifth limb: This is un usually elongated, the endites are comparatively widely
separated from each other in about the same way as is shown in C. Claus’s reproduction of
Cypridina messinensis, 1865, pi. X, fig. 4. Protopodite: The first endite (fig. 19) lias six
bristles, arrangée! in two groups separated by a rather large space, an anterior group of four
bristles and a posterior group of two. Of the former group one bristle is quite short and rather
weak, with short hairs, and is situated somewhat inside the others. The three others are rather
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