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narrow, sublinear, with all the segments well defined. Eyes wanting. Superior
antennae (in female) distinctly 4-articulate. Mandibles well developed, and resem-
bling in structure those in the genus Typhlotanais, the molar expansion being
rather strong, cylindric, and armed at the tip with dentiform tubercles. Cheli-
peds comparatively small, with the hand scarcely dilated. The first 3 pairs of
pereiopoda of similar structure, and more slender than the 3 posterior. Pleopoda
(in female) imperfectly developed, forming simple oval lamellae,
without a trace
of seta). Uropoda rather slender, biramous, rami unequal, Inarticulate. Incuba-
tory pouch normal.
Remarks. The most prominent character of this genus is the simple
structure of the pleopoda in the female, and it is indeed from this character,
that the generic name has been derived. In outward appearance, as also in the
structure of the several appendages, it exhibits a close resemblance to the genus
Leptognathia ; but the structure of the mandibles is very different, and agrees
much more closely with that found in the genus Typhlotanais. The genus con-
tains as yet but a single species.
Haplocope angusta,
(PI. XV. fig. 2).
G. 0. Sars.
Haplocope anyusta, G. 0. Sars. 1. c. p. 51.
Specific Characters. 9- Body extremely slender and narrow, being
fully 10 times as long as it is broad. Cephalosome rather small, slightly nar-
rowed anteriorly, front truncated. 1st free segment of mesosome but little smaller
than the next succeeding ones and somewhat dilated in front, last segment
the smallest. Metasome about the length of the last 2 segments of mesosome
combined, and nearly of uniform breadth throughout, terminal segment of medium
size, and angularly produced in the middle. Superior antenna) somewhat shorter
than the cephalosome, basal joint only attaining the length of the 2 succeeding
joints combined, last joint narrow, conic. Chelipeds
rather small, hand about the
length of -the carpus, fingers shorter than the palm. 1st pair of pereiopoda
scarcely longer than the 2 succeeding pairs; the 3 posterior pairs a little stronger,
and having the outer joints spinotis. Uropoda about half the length
of the me-
tasome, inner ramus rather elongated, outer scarcely more than half as long and
much narrower. Length 1.70 mm.
Remark*. As stated above, this is the only species as yet known of
the genus, and may easily be recognized by its slender, narrow body, and the
simple, lamelliform pleopoda,