368 REPORT OF NEW JERSEY STATE MUSEUM. 



greatest width half its length. Abdominal segments greatly con- 

 stricted to fourth, which narrowest. Color sandy-whitish, yel- 

 lowish below, and lavender tints on carapace. Length about 

 30 mm. 



Remarks. — The sand bug, as it is known in some localities, 

 ranges from Cape Cod to Florida. It is an abundant and familiar 

 crustacean along the entire coast of New Jersey, the sandy shores 

 here afforded being its favorite haunts. It burrows in the sand 

 head first, and makes rapid progress. Often along the beach at 

 Ocean City and Cape May I have seen hundreds, all congregated 

 in some favorite place, where they move about the shifting sands 

 like a great army. It is a good swimmer, moving quickly through 

 the water, and sometimes is left in little pools and drains along 

 the beaches at low water. In such places their quaint and agile 

 movements, as they burrow about in the water-soaked sand, fre- 

 quently attract the attention and afford amusement to the sum- 

 mer visitors to the seashore. Frequently in hauling small seines 

 along the beach great numbers of sand bugs may be obtained, 

 along with OvaUpes ocellatiis, various isopods, medusae, small 

 fishes, etc. Its chief value lies in affording food to various fishes, 

 though in places it is used sometime as bait, and thus known as 

 "bait bug." 



I have examined multitudes of examples from Point Pleasant, 

 Manascjuan Inlet, Seaside Park, Barnegat, Spray Beach on Long 

 Island, Absecon, Atlantic City, Longport, Ocean City, Corson's 

 Inlet, Sea Isle City, Townsend's Inlet, Stone Harbor, Avalon, 

 Anglesea, Wildwood, Cape May and Cape May Point. I also 

 found it abundant at Rehoboth Beach on the cosat of Delaware. 

 Mr. W. T. Davis found it on South Beach, Staten Island, N. Y. 



Super-Family PAGURIDEA. 



The Hennit Crabs. 



Carapace almost always elongate and subcylindrical, much less 

 well calcified behind cervical groove than in front of it. Thoracic 

 sternum narrow or linear. Abdomen elongate, usually soft. 



