Fig. CO.~Astavuti ¿altucus, v. W-S. (Xo, 23.)
the outer antennæ are 130 mrn. in lengtli. Tlie inner
antennæ originate on a line with tlie outer. The
funiculus is shorter, and the flagella, which are equal
in length, are much shorter than those of the outer
antennæ.
The parts of the mouth are normal. The three
first pairs of ambulatory legs are terminated by
chelæ, the fourth pair hear recurved claws, and the
fifth abortive stump-like claws. The chelæ of the
first pair of legs are strangely developed, particularly
the right chela, Avhich is double the length of the
left, and Avith its formidable ranges of long spines
along the inner border of each claAV reproduces on a
small scale tlie jaws of the Gangetic gavial. The last
segment of the pereion is not covered hy the carapace,
but is in movable connection Avith it. The
first segment of the abdomen is very small, and the
segments gradually increase up to the fourth, Avhich
the fifth and sixth equal in size. The abdominal
segments are flattened from above doAvnwards. The
telson is quadrate, and combines with the tAvo pairs
of caudal appendages, which are widely expanded
laterally to form the caudal fin. The dorsal surfaces
of the second, third, and fourth abdominal segments,
and the margins of the tail, are thickly covered Avith
Avoolly hair. The individual heing a male, the first
pair of swimmerets consist of long, slender appendages,
and the four succeeding pairs have one strong,
round, basal joint, to Avhich are attached tAVO palpi
fringed Avith hair. As has heen already mentioned,
there is some resemblance hetAveen this form and
Calianassa ; hut in that genus the lamellar appendage
to the outer antenna is absent, tliere are four pairs
•Ate ■ :1
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