536 



CRUSTACEA. 



Subfam. 4. OPLOPHORIN^.— Pedes lmi sive didactyli sive vergi- 

 formes ; 2di chelati, crassiores. Squama antennarum externarum 

 acuminata, extus spinis armata. 



Gr. 1. Oplophorus, Edwards. — Rostrum longum, dentatum. Antennae internse 

 flagellis duobus confectae. Pedes toti palpigeri, 4 antici chelati. [Abdominis 

 dorsum processubus spiniformibus uno vel pluribus armatum.] 



Gr. 2. Regulus, Dana. — Rostrum longum, dentatum. Antennae internse flagellis 

 duobus confectae. Pedes nulli palpigeri ; 2 antici non chelati, 2di crasse chelati. 

 Mandibularum palpus 3-articulatus. [Abdominis segmentum Stium dorso 

 postico instar spinas longae productum.] 



Fam. IV. PASIPK2EID2E. 



Gr. 1. Pasiphjea, Savigny. — Rostrum obsolescens. Antennae internae flagellis 

 duobus confectae. Pedes 4 antici subaequi, manubus gracilibus.* 



Family CRANGONID^E. 

 Subfamily CRANGONINiE. 

 CrAngon vulgaris, Fabr. 

 Bay of San Francisco, California, and Puget's Sound, Oregon. 



This species was first reported from the California coast by Owen, 

 in the Voyage of the Blossom, Crust., p. 87. 



Crangon munitus. 

 Rostrum brevissimum, rotundatum. Carapax partim 7 -ear hiatus, ca- 



* Brief descriptions of the following new species of Macroura are published by the 

 author in the Proc. Acad. Nat. Sci. Philad., for January, 1852. 



