536 CRUSTACEA. 



SUBFAM. 4. OPLOPHORIN^E. Pedes Imi sive didactyli sive vergi- 

 formes ; 2di chelati, crassiores. Squama antennarum externarum 

 acuminata, extus spinis armata. 



G. 1. OPLOPHORUS, Edwards. Kostrum longum, dentatum. Antennae internse 

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

 dorsum processubus spiniformibus uno vel pluribus armatum.] 



Gr. 2. REGULUS, Dana. Rostrum longum, dentatum. Antenna internse flagellis 

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

 Mandibularum palpus 3-articulatus. [Abdominis segmentum Stium dorso 

 postico instar spin* longae productuni.] 



FAM. IV. PASIPH^ID^J. 



G.I. PASIPH^EA, Savigny. Rostrum obsolescens. Antennas internse flagellis 

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



FAMILY CRANGONID^E. 

 SUBFAMILY CRANGONIN^E. 

 CRANGON VTILGARIS, 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 1-carinatus, 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. 



