268 OREGONIA LONGIMANA. 



rostrum, which is slender, and twice the length 

 of the interorbital space. Pleon in the male 

 narrow, 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. 



