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the round joined part ventrally-proximally on the rostrum which is reproduced in the figure
just mentioned. At the postero-dorsal corner of the shell there is a rather weakly developed
hinge-socket and hinge-tooth, of about the same types as in pl. II, fig. 1 (of C. magna, Ç),
C. Claus, 1891 a.
First antenna: — The b-, d- and e-bristles are in most cases subequal, about
a quarter or a fifth longer than the joints of this antenna. The e-bristle had the following
e-bristles of the antenna are broken, <$: 400 X. 5. Equipment of the e-bristle of this antenna; the fourth to the
seventh spines counting from the point of the bristle, 1267 X- 6. The proximal tooth-list of the right mandible
seen from inside, $; 1200 X. 7. Distal part of the penis seen from outside; 567 X. 8. Copulatory appendage of the
penis; 567 X. 9. Distal part of the rod-shaped organ, $; 567 X. (Kigs. 1, 2, 4, 7, 8 from specimens from station
33; fig. 3 from a specimen from station 19; fig. 5 from a specimen from station 53 and figs. 6 and 9 from
a specimen from station 45.)
armature in the specimens investigated by me (cf. for other details pp. 702—706below): Somewhat
distally of the middle this bristle has two rows of proximally pointing spines along about
a quarter of its length. The distal spines in eacli of these rows are situated close together;
these spines are situated in pairs in the two rows. From the eighth or the tenth pair, counting
distally-proximally, the two rows approach each other and the spines push alternately in between
each other, so that a single, though not a quite straight, row is formed; at the same time the
distance between the spines increases, some of these being often even rather sparsely situated
(about the same as in pi. 6, fig. 5, G, W. MÜLLER, 1894). In profile 1 saw about 20—25 spines
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