BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



second; the fourth is more than one and a half times longer than the 

 second; the fifth is minute and terminates in a bunch of hairs. 



The first segment of the thorax is coalesced with the head to form 

 a carapace. The second or first free segment is a little shorter than 

 any of those following. The third 'and fourth or second and third 

 free segments are subequal ; the last three are subequal, and each is a 

 little longer than either of the two preceding segments. 



FIG. 4. PANCOLUS CALI- 

 FORNIENSIS. MANDIBLE. 

 x44. 



FIG. 5. PANCOLUS CAL- 

 IFORNIENSIS. MAX- 

 ILLIPED. X 44. 



FIG. 6. PANCO- 

 LUS CALIFORNI- 

 ENSIS. EPIG- 

 NATH OF MAX- 

 ILLIPED. X 44. 



FIG. 7. PANCOLUS CAL- 

 IFORNIENSIS. POSTE- 

 RIOR LIP. x 44. 



The abdomen is composed of three segments, two short ones followed 

 by the terminal segment, which is rounded posteriorly. The uropoda 

 are single branched. The peduncle is short. The branch consists of 

 a single article, tipped with long hairs. There are but two pairs of 

 well-dev 7 eloped pleopoda. 



FIG. 8. PANCO- 

 LUS CALIFORNI- 



ENSIS. FIRST 

 MAXILLA. X44. 



FIG. 9. PANCOLUS CAL- 

 IFORNIENSIS. FIRST 

 PLEOPOD. X 44. 



FIG. 10. PANCOLUS CAL- 

 IFORNIENSIS. SECOND 

 PLEOPOD. X 44. 



The first pair of legs or gnathopods are chelate. The second pair 

 of legs are long and feeble, and similar to those following, which are 

 ambulatory, but more robust. The dactyli in the last three pairs are 

 curved. 



Six specimens of this species were collected by Mr. Harold Heath 

 at Monterey Bay, California. 



The types are in the U. S. National Museum. Cat. No. 30614, 

 U.S.N.M. 



