268 OREGONIA LONGIMANA. 
rostrum, which is slender, and twice the length 
ot the interorbital space. Pleon in the male 
_ harrow, concave upon each side, corresponding 
with the fourth, fifth, and sixth segments. Tel- 
son rather broader than the preceding segment, 
and emarginate at the terminal extremity. The 
first pair of pereiopoda are very long, being 
twice the length of the carapace, and much longer 
than in either of the species described by Dana 
and Stimpson. The meros reaches quite to the 
extremity of the rostrum, and is furnished with 
two or more longitudinal rows of small granulated 
tubercles; the propodos is rather longer than 
the meros, and its breadth is equal to about one- 
third of its length; the dactylos is about one- 
third the length of the propodos, slightly curved, 
and minutely serrated on the inner margin, which 
impinges throughout its entire length upon the 
produced extremity of the propodos. The three 
succeeding pairs of pereiopoda are imperfect in 
the only specimens procured, but the last pair 
are long, cylindrical, slender, and terminated in 
a powerful dactylos. 
This crab was obtained in Esquimalt Harbour, 
and in its habits and general distribution are 
very similar to the preceding. 
