REPORT OF COMMISSIONERS OF INLAND FISHERIES. 77 



When are the eggs laid, and how long after copulation? 

 How long does the female carry the eggs? 

 Extent of hatching season: 



Liblnia emarginata Leach. " Spider Crab." 



Plate VI. Figure 26. 

 L. canaliculata Say. Verrill and Smith, 1874. 



L i b i n i a e m a r g i n .h t a , which is the more common of the 

 two species, has nine median spines. 

 Habitat: muddy shores and flats. 

 Distribution: Atlantic coast to the Gulf of Mexico. 

 Economic value: 

 Season in Rhode Island: 



When are the eggs laid, and how long after copulation? 

 How long does the female carry the eggs? 

 Extent of hatching season: 



(Tribe) OXYSTOMATA. 



Occasionally a species from the femily Calappidaeis found in 

 Narragansett Bay, but as it is typically a southern group only a brief 

 description will be given. A good description of this tribe will be 

 found in "The Brachyura and Macrura of Porto Rico," by M. J. 

 Rathbun, 1901. 



Calappa flammea Herbst. "Box Crab." "Shamefaced Crab." 



Plate VI. Figure 27. 



The carapace is strongly convex, rounded in front, much broadened 

 behind by a pair of shield-shaped expansions. The front is small and 

 somewhat triangular. The cheliped are large, with cockscomb-like 

 crests on the upper margins of the hands. 



